Grassroots Conservation of Biological Diversity in the United States

Total Page:16

File Type:pdf, Size:1020Kb

Grassroots Conservation of Biological Diversity in the United States Chapter 2 Chapter 2 Representative Groups In the United States, there is a very large pies. This report is not intended to rank these number of groups and individuals preserving groups above others but to display the range biological diversity at the grassroots level, The of activities and contributions of such groups following showcase examples were selected and individuals to the maintenance of biologi- with the realization that numerous groups ex- cal diversity, ist which would provide equally suitable exam- Synopsis of Groups Highlighted in This Background Paper ——— Page Grassroots group: Major activities number Abundant Life Seed Foundation: Regional seed exchange in the Pacific Northwest . ., . ,.. 38 American Cream Draft Horse Association: Registering, [certifying, and promoting a single breed of livestock . ., , . ., . 44 American Minor Breeds Conservancy: Coordinating conservation activities for rare domestic breeds of livestock . ... , . ,., 44 Center for Plant Conservation: Coordinating preservation activities of 18 U.S. botanical gardens and arboreta . , . , . , . 27 Desert Botanical Gardens: Maintaining, researching, and displaying common and rare desert plants . 26 Desert Fishes Council: Preserving species and habitats of fishes in arid regions of the Southwest . .,. 16 Desert Tortoise Preserve Committee: Conserving the Desert Tortoise through establishment of a 38-acre tortoise preserve . , . 12 Florida Audubon Society: Regional society engaged in a broad range of ecosystem and species conservation activities . , . , . 22 Greater Yellowstone Coalition: Advocacy group and coordinating body for groups concerned with preserving the Greater Yellowstone ecosystem . 18 Individuals, agricultural animals: Maintaining and breeding one to several minor breeds of livestock . 42 Individuals, American Federation of Aviculture: Organization serving individuals engaged in the keeping and breeding of nonnative birds . ., . 31 Land Trust Exchange: Providing legal and technical support to land preservation groups ... 13 Living Historical Farms: Recreating and interpreting historic agricultural settings . 39 Native Seeds/SEARCH: Collecting, preserving, and disseminating native crops and their wild relatives of the Southwest . 39 North American Fruit Explorers: Exploring, maintaining, and exchanging informaion on fro it and nut varieties . 37 Prairie Preservation Society of Ogle County: Preserving an 1 l-acre tall grass prairie site in Illinois . 10 Rhododendron Species Foundation: Collecting, preserving, and propagating wild species of Rhododendron . 24 Seed Savers Exchange: Preserving heirloom and endangered commercial varieties of garden vegetables . 3 5 Southeast Alaska Conservation Council: Advocacy group and coordinating body for groups concerned with management of the Tongass National Forest . 20 Texas game ranchers: Maintaining and breeding large, nonnative mammal species . 32 Wildlife Education Program for a Living Future: Environmental education with emphasis on human/predator interactions . ... , ., . , . 15 9 10 SPECIES AND ECOSYSTEMS--ON-SITE Maintaining biological diversity of wild spe- The actions taken by these organizations cies on-site offers unique advantages over liv- range from relatively passive (e. g., comment- ing collections maintained off-site. On-site pres- ing on agency proposals) to confrontational (e.g., ervation permits efficient maintenance of far stopping construction of a dam). Indeed, a few greater species diversity than is possible through groups consider civil disobedience a valuable off-site methods. With on-site methods, entire tool. In most cases, however, lawsuits in State communities of species and their diverse or Federal courts are the intervention method habitats can be preserved with the result that of choice. Few of these groups explicitly pro- natural selection and evolutionary processes mote the maintenance of biological diversity, continue. In addition, both the known and cur- yet many of the programs and actions they en- rently valued as well as unknown and poten- courage have direct bearing on it, Environ- tially valuable species are maintained. Both on- mental advocacy groups often focus, refine, and site and off-site techniques are important com- articulate public needs by providing leadership, ponents in an integrated program for preser- information, or organization. They can be sen- vation of all segments of biological diversity (42). sitive and highly responsive to conditions or sit- uations overlooked by government agencies be- About 40 percent of all lands in the United cause they are diverse, local, and adaptable States are publicly owned. Within this Federal (43,45), They can, in addition, provide an ave- land system, a network of natural areas with nue for public comment on particular govern- various degrees of protection (e. g., national ment proposals, which may effect biological parks, wildlife refuges, marine sanctuaries, wild diversity. and scenic rivers, national forests, and wilder- ness areas) maintains components of biologi- The methods of on-site preservation vary and cal diversity. These Federal efforts are rein- include acquiring land, providing assistance forced by a number of private groups working to private landowners or local conservation actively to preserve land and the natural diver- groups, facilitating communication or con- sit y it supports. Some of these groups play a key certed action by mediating between large and political role in supporting legislative safe- sometimes competing interests, and environ- guards protecting natural areas. Others watch mental advocacy, The following descriptions over and care for specific areas that might other- illustrate the variety of activities and approaches wise suffer from neglect, inattention, or short- taken by on-site preservation groups. age of funding. Both the government and the private sector hold land, but private groups do Prairie Preservation Society so largely to fill in gaps where the government will not, cannot, or should not (43). of Ogle County Interested citizens and groups commonly pro- Prairielands are one of the most threatened vide information that aids in the administration ecosystems in North America. In Illinois, for of government programs. The efforts of con- example, studies indicate that less than 1 per- cerned citizens and organizations have precipi- cent of the original tallgrass prairie remains in tated government actions at the Federal, State, its native form (30). Prairies have been converted and local level. Individuals and groups have mainly into agricultural production and now worked to initiate, modify, or cancel govern- support the Wheat Belt and Corn Belt of the Na- ment policies and actions that affect the envi- tion’s Midwestern States. Many of the remain- ronment (43), They promote environmental ing vestiges of native prairie appear in old grave- quality in legislative, legal, and administrative yards, along railroad right-of-ways, and as arenas and, like the government, function at lo- private landholdings. Because these remnants cal, State, interstate, national, and international are scattered, Federal consolidation and pro- levels (43). tection is difficult, and local grassroots organ i- . — 11 —. v Photo credit: Praire Preservafion Society of Ogle County Members of the Prairie Preservation Society of Ogle County, Illinois conducting a controlled burning of Bicentennial Prairie as part of their regular management activities for this preserve zations are attempting to fill this void in Fed- tion . .,” particularly relating to local prairie eral ecosystem protection. habitats (54). The organization obtained funds from the State Bicentennial Commission with One of these organizations is the Prairie Pres- a matching grant from the County for purchase ervation Society of Ogle County, Inc., a land of a local prairie remnant. The organization be- trust of individuals concerned with native came fee-title owners of an 11½-acre parcel of prairielands in I11inois. The organization grew native prairie previously held by a private indi- from the collaboration of a Soil Conservation vidual in 1980. It was appropriately named Bi- Service soil scientist with a local “prairie en- centennial Prairie. thusiast” who also was a prairie nursery owner and prairieland restorer. Their idea was to pur- Most of the society’s 360 members are from chase a remnant prairie parcel to bring recog- Ogle County, Illinois, The governing body, of- nition to the native prairies in Illinois during the Nation’s 1976 Bicentennial Celebration. ficers, and consultants are all volunteers. Like many nonprofit groups, a core of about 20 indi- The society organized in 1975 as a not-for- viduals does most of the work of the organiza- profit organization whose purpose was to tion, including restoration work on Bicenten- " . engage in or promote charitable, scientific, nial Prairie. Work crews conduct controlled and educational activities in the fields of natu- burning operations on the site during the spring ral history and environmental quality protec- to restore the Prairie to pristine condition. They 12 also cut brush and wood to maintain the prai- Desert Tortoise Preserve Committee rie habitat. The prairie site is available for scien- tific and educational projects, and a checklist Less than 25 years ago, it was not uncommon of plant species on the site has been developed. for people living in southern California to take Many grade-school groups and college classes, trips through the local desert and return
Recommended publications
  • Dairy Crossbreeding—Deal Or No Deal? by Larry F
    Dairy Crossbreeding—Deal or No Deal? by Larry F. Tranel, ISU Extension Dairy Field Specialist, NE and SE Iowa ISU Extension’s “Millionaire Model Farms” are practicing crossbreeding. Is the crossbreeding deal a good deal for your dairy? The answer “depends” on many variables. Do you want to maximize milk production per cow? Then the answer is “no deal” to dairy crossbreeding as straight Holsteins produce around 7-10% more milk per cow than their crossbred counterparts. Do you want to maximize combined fat and protein per cow? Then the answer is probably also “no deal” at this time as straight Holsteins produce an estimated 3-5% more fat plus protein in recent research data. On the surface, it sounds like crossbreeding is a no deal situation as a conscious decision must be made to sacrifice milk and component production per cow. However, there are many other variables to account for in the decision. For example, recognize an estimated 6% reduction in dry matter intake in the crossbreds with equal feed efficiency compared to a pure holstein. This 6% dry matter intake reduction (Holstein-Jersey cross) may equate to about three pounds of dry matter per cow per day or .5 ton of dry matter per cow per year. The cost per cow of feed savings is only about $75 which can compensate for 625 pounds of $12/cwt milk or 3% of the milk lost versus pure Holsteins. Thus, some of the lost milk is recovered in feed cost savings. Economic values also need to be put on other traits that become a part of the equation.
    [Show full text]
  • Crossbreeding Systems for Small Beef Herds
    ~DMSION OF AGRICULTURE U~l_}J RESEARCH &: EXTENSION Agriculture and Natural Resources University of Arkansas System FSA3055 Crossbreeding Systems for Small Beef Herds Bryan Kutz For most livestock species, Hybrid Vigor Instructor/Youth crossbreeding is an important aspect of production. Intelligent crossbreed- Generating hybrid vigor is one of Extension Specialist - the most important, if not the most ing generates hybrid vigor and breed Animal Science important, reasons for crossbreeding. complementarity, which are very important to production efficiency. Any worthwhile crossbreeding sys- Cattle breeders can obtain hybrid tem should provide adequate levels vigor and complementarity simply by of hybrid vigor. The highest level of crossing appropriate breeds. However, hybrid vigor is obtained from F1s, sustaining acceptable levels of hybrid the first cross of unrelated popula- vigor and breed complementarity in tions. To sustain F1 vigor in a herd, a a manageable way over the long term producer must avoid backcrossing – requires a well-planned crossbreed- not always an easy or a practical thing ing system. Given this, finding a way to do. Most crossbreeding systems do to evaluate different crossbreeding not achieve 100 percent hybrid vigor, systems is important. The following is but they do maintain acceptable levels a list of seven useful criteria for evalu- of hybrid vigor by limiting backcross- ating different crossbreeding systems: ing in a way that is manageable and economical. Table 1 (inside) lists 1. Merit of component breeds expected levels of hybrid vigor or het- erosis for several crossbreeding sys- 2. Hybrid vigor tems. 3. Breed complementarity 4. Consistency of performance Definitions 5. Replacement considerations hybrid vigor – an increase in 6.
    [Show full text]
  • Curriculum.Pdf
    Teaching Curriculum for the North American International Livestock Exposition (NAILE) by Stephanie Darst The North American International Livestock Exposition is the world’s largest purebred, all-breed livestock show. It is held, annually in November, at the Kentucky Exposition Center in Louisville, Kentucky. This publication was produced by the Kentucky State Fair Board, a state agency in the Commerce Cabinet, and presenter of the North American International Livestock Exposition. Copyright © 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Kentucky State Fair Board NORTH AMERICAN INTERNATIONAL LIVESTOCK EXPOSITION Dear Educator: The North American International Livestock Exposition (NAILE) would like to thank you for participating in the NAILE Educational Program. Please use this publication, Teaching Curriculum for the North American International Livestock Exposition. The curriculum is just one part of the Educational Program. The other component of the Educational Program is the school tours held during the NAILE, these tours serve thousands of students each November. The Teaching Curriculum for the North American International Livestock Exposition is presently in a flexible and changing format. It is photocopied on loose-leaf pages to facilitate sharing and further photo-reproduction. (Although these materials are copyrighted, we fully intend for them to be duplicated for educational purposes. Please seek permission should you wish to alter or publish any of the enclosed materials.) We ask that all teachers receiving this publication become an important part of our evaluation process. Please return the completed evaluation form to us as soon as possible, so that we may improve this resource. When you share these materials with other teachers, please copy the form for them as well, encouraging them to evaluate what they use.
    [Show full text]
  • Review of the Current State of Genetic Testing - a Living Resource
    Review of the Current State of Genetic Testing - A Living Resource Prepared by Liza Gershony, DVM, PhD and Anita Oberbauer, PhD of the University of California, Davis Editorial input by Leigh Anne Clark, PhD of Clemson University July, 2020 Contents Introduction .................................................................................................................................................. 1 I. The Basics ......................................................................................................................................... 2 II. Modes of Inheritance ....................................................................................................................... 7 a. Mendelian Inheritance and Punnett Squares ................................................................................. 7 b. Non-Mendelian Inheritance ........................................................................................................... 10 III. Genetic Selection and Populations ................................................................................................ 13 IV. Dog Breeds as Populations ............................................................................................................. 15 V. Canine Genetic Tests ...................................................................................................................... 16 a. Direct and Indirect Tests ................................................................................................................ 17 b. Single
    [Show full text]
  • The Stallion's Mane the Next Generation of Horses in Mongolia
    The Stallion's Mane The Next Generation of Horses in Mongolia Amanda Hund World Learning- S.I.T. SA – Mongolia Fall Semester 2008 S. Ulziijargal Acknowledgments This paper would not have been possible without the help and enthusiasm of many people, a few of which I would like to thank personally here: I would like to acknowledge Ulziijargal, Ganbagana and Ariunzaya for all their patience, help, and advice, Ulziihishig for his excellent logistical work and well placed connections and Munkhzaya for being a wonderful translator and travel partner and for never getting sick of talking about horses. I would also like to thank the families of Naraa, Sumyabaatar, and Bar, who opened their homes to me and helped me in so many ways, Tungalag for being a helpful advisor, my parents for giving me the background knowledge I needed and for their endless support, as well as all those herders, veterinarians, and horse trainers who were willing to teach me what they know. This research would not have been possible without the open generosity and hospitality of the Mongolian people. 2 Table of Contents Abstract...................................4 Introduction.............................5 Methods...................................8 The Mongolian Horse.............11 Ancestors................................14 Genetic Purity........................15 Mares.....................................16 Reproduction..........................17 Stallions..................................22 Bloodlines...............................25 Passion on the Tradition.........27
    [Show full text]
  • 3Rd Period Allele: Alternate Forms of a Genetic Locus
    Glossary of Terms Commonly Encountered in Plant Breeding 1st Period - 3rd Period Allele: alternate forms of a genetic locus. For example, at a locus determining eye colour, an individual might have the allele for blue eyes, brown, etc. Breeding: the intentional development of new forms or varieties of plants or animals by crossing, hybridization, and selection of offspring for desirable characteristics Chromosome: the structure in the eukaryotic nucleus and in the prokaryotic cell that carries most of the DNA Cross-over: The point along the meiotic chromosome where the exchange of genetic material takes place. This structure can often be identified through a microscope Crossing-over: The reciprocal exchange of material between homologous chromosomes during meiosis, which is responsible for genetic recombination. The process involves the natural breaking of chromosomes, the exchange of chromosome pieces, and the reuniting of DNA molecules Domestication: the process by which plants are genetically modified by selection over time by humans for traits that are more desirable or advantageous for humans DNA: an abbreviation for “deoxyribose nucleic acid”, the carrier molecule of inherited genetic information Dwarfness: The genetically controlled reduction in plant height. For many crops, dwarfness, as long as it is not too extreme, is an advantage, because it means that less of the crop's energy is used for growing the stem. Instead, this energy is used for seed/fruit/tuber production. The Green Revolution wheat and rice varieties were based on dwarfing genes Emasculation: The removal of anthers from a flower before the pollen is shed. To produce F1 hybrid seed in a species bearing monoecious flowers, emasculation is necessary to remove any possibility of self-pollination Epigenetic: heritable variation caused by differences in the chemistry of either the DNA (methylation) or the proteins associated with the DNA (histone acetylation), rather than in the DNA sequence itself Gamete: The haploid cell produced by meiosis.
    [Show full text]
  • Crossbreed Genetic Performance Study in the Eventing Horse Competition
    CSIRO PUBLISHING Animal Production Science http://dx.doi.org/10.1071/AN14677 Crossbreed genetic performance study in the eventing horse competition I. Cervantes A,D, E. BartoloméB, M. Valera B, J. P. Gutiérrez A and A. Molina C ADepartment of Animal Production, Veterinary Faculty, Complutense University of Madrid, Avda. Puerta del Hierro s/n, 28040 Madrid, Spain. BDepartment of Agro-Forestal Sciences, ETSIA, University of Sevilla, Ctra. Utrera km 1, 41013 Sevilla, Spain. CDepartment of Genetics, University of Córdoba, Ctra. Madrid-Cádiz, km 396a, 14071 Córdoba, Spain. DCorresponding author. Email: [email protected] Abstract. Eventing is an equestrian discipline combining dressage, show jumping and cross-country exercises. The Spanish Sport Horse (SSH) was used in this study as an example to develop a method to ascertain the influence of parental breeds on particular performances by linking their parental genetic contribution with the individual phenotype value computing the optimal breed contribution for each trait evaluated in eventing. Data included 1220 eventing records from 210 SSH animals. The genetic contribution of six main founder populations were computed for each SSH: the Spanish Purebreed (SPB), Arab Horse (A), Thoroughbred (TB), Selle Francais¸ (SF), German breeds (G) and North(-west) European (N) breeds. For this analysis we used BLUP (best linear unbiased predictor) animal models for five defined traits and for the total score. The genetic contribution as linear and quadratic adjustment and the interaction between genetic contributions were included as covariates in the genetic model to separate the possible combining ability from the breeding values. The optimal breed genetic contribution for each trait was maximised by using a simplex method.
    [Show full text]
  • The Science of Crossing and Crops How Modern Science Is Helping Produce More Food in a a Teaching Unit Changing Climate for Year 11 Science Students
    THE SCIENCE OF CROSSING AND CROPS HOW MODERN SCIENCE IS HELPING PRODUCE MORE FOOD IN A A TEACHING UNIT CHANGING CLIMATE FOR YEAR 11 SCIENCE STUDENTS THE SCIENCE OF CROSSING AND CROPS 1 About the GRDC The GRDC GRDC Values The Grains Research and Development Corporation is a • We are committed and passionate about the Australian statutory authority established to plan and invest in research, grains industry. development and extension (RD&E) for the Australian grains • We value creativity and innovation. industry. • We build strong relationships and partnerships based on Its primary objective is to drive the discovery, development mutual trust and respect. and delivery of world-class innovation to enhance the productivity, profitability and sustainability of Australian grain • We act ethically and with integrity. growers and benefit the industry and the wider community. • We are transparent and accountable to our stakeholders. Its primary business activity is the allocation and management of investment in grains RD&E. Contact TELEPHONE: 02 6166 4500 GRDC Vision FACSIMILE: 02 6166 4599 A profitable and sustainable Australian grains industry, valued EMAIL: [email protected] by the wider community. INTERNET: www.grdc.com.au GRDC Mission Create value by driving the discovery, development and delivery of world-class innovation in the Australian grains industry. Title: The science of crossing and crops – How modern science is helping produce more food in a changing climate Project Code: AGC00001 Authors: AgCommunicators JUNE 2016 ©Grains Research and Development Corporation 2016 All Rights Reserved This publication is copyright. Except as permitted under the Australian Copyright Act 1968 (Commonwealth) and subsequent amendments, no part of this publication may be reproduced, stored or transmitted in any form or by any means, electronic or otherwise, without the specific permission of the copyright owner.
    [Show full text]
  • Breeding for Health in Non Pedigree Dogs
    Breeding for health in non pedigree dogs Dog breeders today have a number of diff erent considerations to make when deciding whether to mate two dogs together. e emphasis that each breeder places on their choice of breeding dog will vary according to what they are trying to achieve, but all breeders should consider temperament, characteristics, health screening and genetic diversity. All dogs (like people too) are at risk of inheriting diseases. is quick guide is designed to provide some general information on health testing and schemes available for breeders of non pedigree dogs. Due to the wide variation found in a litter of crossbred puppies, breeders of these dogs have an extra challenge, as it is more diffi cult to predict the temperament and physical characteristics than in purebred dogs. If you are new to dog breeding then you should consider seeking out experienced breeders of your crossbred dog for advice on how to breed responsibly. With cross-bred and purbred dogs alike, the general health of a dog is paramount, especially prior to breeding e.g. ensuring no infections. is short guide however, can take you through the steps to gain a better understanding of how to choose appropriate healthy parents and how to breed healthy, happy puppies. Where to start? e Breed Information Centre, available on the Kennel Club website, provides health testing recommendations for each Kennel Club recognised breed. Breeders of crossbred dogs should look at the health information for each breed that makes up their dog. If you are thinking of breeding a cross between a Labrador Retriever and a Standard Poodle, for example, you should consider carrying out all of the tests for both breeds: BVA/KC Hip and Elbow Dysplasia Schemes, BVA/KC/ISDS Eye Scheme, DNA tests, and breed club recommendations.
    [Show full text]
  • Efficiency of Growing Crossbreed Bull-Calves of the Mountain Cattle with Russian Polled Breed
    E3S Web of Conferences 176, 02004 (2020) https://doi.org/10.1051/e3sconf /202017602004 IDSISA 2020 Efficiency of growing crossbreed bull-calves of the mountain cattle with Russian polled breed G.A. Simonov1, V.S. Zoteev2, M.M. Sadykov3, P.A. Aligazieva4, and M.P. Alikhanov3 1Vologda Scientific Center of the Russian Academy of Sciences, North-Western Research Institute of dairy and grassland farming, 160555, Lenin St., 14, Molochnyy rural settlement, Vologda, Russia 2Samara State Agrarian University, 446442, Uchebnyy St., 1, Ust'-Kinel'skiy, Samara region, Russia 3Federal Agrarian Scientific Center of the Republic of Dagestan, 367950, Makhachkala, Dagestan region, Russia 4Dagestan State Agrarian University, 367032, Magomed Gadzhiev St., 180, Makhachkala, Dagestan region, Russia Abstract. The article presents the results of cross-breeding of mountain cattle with Russian polled breed. The growth and development of the crossbreed and purebred bull-calves of these breeds in the mountainous province of Dagestan have been studied in a comparative aspect. Efficiency of highland pastures use by crossbreed animals in comparison with pure- bred mountain peers has been established. The young cattle was grown according to the technology of meat cattle breeding “cow — calf”. In ablactation, the crossbred bull-calves had a living weight of 191.3 kg versus 159.3 kg in peers of mountain cattle. This figure was higher by 32.0 kg or 20.1% compared to purebred bull-calves of mountain cattle. At 12 months of age, the crossbred animals were also superior in living weight in comparison of young mountain cattle by 40.1 kg or 18.4%. According to this indicator, the advantage in crossbred animals at 15 months of age remained.
    [Show full text]
  • Use of Polymorphisms in the Γ-Gliadin Gene of Spelt and Wheat
    Article pubs.acs.org/JAFC Use of Polymorphisms in the γ-Gliadin Gene of Spelt and Wheat as a Tool for Authenticity Control† Franz Mayer, Ilka Haase,* Annika Graubner, Friederike Heising, Angelika Paschke-Kratzin, and Markus Fischer Hamburg School of Food Science, Institute of Food Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany ABSTRACT: Partial sequencing of the γ-gliadin gene of 62 spelt and 14 soft wheat cultivars was performed. Fifty-six of the 62 spelt cultivars and 13 of the 14 soft wheat cultivars were shown to exhibit the typical spelt or soft wheat γ-gliadin sequence, respectively. Exceptions were ascribed to crossbreeding of soft wheat and spelt. Using the typical soft wheat γ-gliadin sequence, two alternative DNA-based analytical methods were developed for the detection and quantification of spelt flour “adulteration” with soft wheat. A simple and fast detection of soft wheat in spelt flours could be achieved by restriction fragment length (RFLP) analysis. In combination with lab-on-a-chip capillary gel electrophoresis (LOC-CE) the soft wheat proportion could be estimated. Heteroduplex formation served as additional confirmation for the presence of spelt besides soft wheat. Hence, RFLP-LOC-CE constitutes a perfect analysis tool for the quality control of cereal seeds and pure cultivars. A precise quantification of soft wheat “adulterations” in spelt flour down to 1% could be achieved by the developed real-time PCR method. The calibration parameters of the real-time PCR assay fulfilled the minimum performance requirements of the European Network of GMO (genetically modified organisms) Laboratories (ENGL). KEYWORDS: spelt “adulteration”, PCR-RFLP, lab-on-a-chip capillary gel electrophoresis, multitemplate PCR, heteroduplexes, real-time PCR ■ INTRODUCTION According to the market intervention rules of the European A century ago, the hexaploid spelt (Triticum aestivum ssp.
    [Show full text]
  • The Genetic Principles of Crossbreeding
    Beef Cattle Handbook BCH-1400 Product of Extension Beef Cattle Resource Committee The Genetic Principles of Crossbreeding David S. Buchanan, Oklahoma State University Sally L. Northcutt, Oklahoma State University Crossbreeding is the mating of two individuals with dif- Heterosis Defined ferent breed makeups. It is widely used in commercial Heterosis is a measure of the superior performance of beef production because of the benefits it has to offer the crossbred relative to the average of the purebreds cow-calf producers. Improvements in efficiency can be involved in the cross. The probable cause of most hetero- dramatic if appropriate breed combinations are used. sis is due to combining genes from different breeds, con- Crossbreeding does not eliminate the need for outstand- cealing the effects of inferior genes. Heterosis may result ing purebred cattle since efficient systems require well in the crossbred being better than either parental breed characterized, superior purebred cattle. Crossbreeding in or simply better than the average of the two. For exam- beef cattle did not receive widespread approval until the ple, an Angus x Hereford crossbred calf may generally last few decades; however, a large percentage of com- grow faster than either Angus or Hereford purebreds. mercial cattle today are crossbred. However, a Charolais x Angus crossbred calf may not Crossbreeding is one type of a larger class of mat- grow as fast as a purebred Charolais or have the ability ing systems called outbreeding. Outbreeding has the to marble similar to purebred Angus but will likely be opposite effect of inbreeding and is defined as the mat- better than the average of the purebreds for both traits.
    [Show full text]