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(12) Patent Application Publication (10) Pub. No.: US 2014/0223611 A1 LNDEMAN Et Al

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(12) Patent Application Publication (10) Pub. No.: US 2014/0223611 A1 LNDEMAN Et Al US 20140223611A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2014/0223611 A1 LNDEMAN et al. (43) Pub. Date: Aug. 7, 2014 (54) METHOD FORTRANSFERRING ONE OR Publication Classification MORE GENETIC TRAITS FROMA PLANT OF THE PURPLE-FLOWERED CAPSCUM (51) Int. Cl. SPECIES TO A PLANT OF THE AOIH 5/08 (2006.01) WHITE-FLOWERED CAPSCUMI SPECIES (52) U.S. Cl. CPC ........................................ A0IH 5/08 (2013.01) (71) Applicant: Enza Zaden Beheer B.V., Enkhuizen USPC ....................................................... 8OO/317.1 (NL) (57) ABSTRACT (72) Inventors: Wouter LINDEMAN, Enkhuizen (NL); Iris Alke HEIDMANN, Enkhuizen (NL) The present invention relates to a white-flowered Capsicum annuum plant, comprising a gene encoding the bacterial spot (73) Assignee: Enza Zaden Beheer B.V., Enkhuizen disease resistance protein 4 (BS4), wherein the gene is derived (NL) from a purple-flowered Capsicum species plant and the gene conveys resistance to a bacterial spot pathogen disease caused (21) Appl. No.: 14/091,275 by Xanthomanas campestris pv. vesicatoria. The invention also relates to a white-flowered Capsicum annuum plant, (22) Filed: Nov. 26, 2013 comprising a gene encoding the bacterial spot disease resis tance protein 4 (BS4), wherein the plant is resistant to bacte Related U.S. Application Data rial spot pathogen disease caused by Xanthomanas campes (60) Continuation of application No. 13/232,466, filed on tris pv. vesicatoria race I, II, III, IV, and VI. The invention Sep. 14, 2011, now Pat. No. 8,618,370, which is a further relates to a seed that produces a white-flowered Cap division of application No. 11/992,503, filed on May sicum annuum plant, comprising a gene encoding BS4, and 19, 2008, now Pat. No. 8,022,278, filed as application pepper fruit produced by a white-flowered Capsicum annuum No. PCT/EP2005/054759 on Sep. 22, 2005. plant, comprising a gene encoding BS4. Product of self pollinated C. pub, C. ex, C. frut plant combined with C. chin and C. ann. hybrid Patent Application Publication Aug. 7, 2014 Sheet 1 of 6 US 2014/0223611 A1 Patent Application Publication Aug. 7, 2014 Sheet 2 of 6 US 2014/0223611 A1 C. pubescens plants with desired resistance FG. 2B Patent Application Publication Aug. 7, 2014 Sheet 3 of 6 US 2014/0223611 A1 frutescens F.G. 3B Product of step FG. 3A Patent Application Publication Aug. 7, 2014 Sheet 4 of 6 US 2014/0223611 A1 h eSe Product of C pub, ... exi and C. fruit FG. 4A Patent Application Publication Aug. 7, 2014 Sheet 5 of 6 US 2014/0223611 A1 Product of self poll inated C pub, C. ex, C. frut plant comb ine d Wi th C. chin and C hybri FG 5 Patent Application Publication Aug. 7, 2014 Sheet 6 of 6 US 2014/0223611 A1 FG 6A FG . 6B FG Ll CD CO O US 2014/0223611 A1 Aug. 7, 2014 METHOD FORTRANSFERRING ONE OR wild or other domesticated species of Capsicum, Such as for MORE GENETIC TRAITS FROMA PLANT example in C. pubescens which carries unique and specific OF THE PURPLE-FLOWERED CAPSCUM traits, such as the resistance against certain races of the bac SPECIES TO A PLANT OF THE terium Xanthomonas vesicatoria, that are not present in the WHITE-FLOWERED CAPSCUMI SPECIES white flowering species. It thus may be advantageous to trans fer Such favourable genetic traits, such as any resistance gene, RELATED APPLICATIONS from the distinctly related purple-flowered C. pubescens to 0001. This application is a continuation of U.S. applica the commonly used white-flowered species such as C. tion Ser. No. 13/232,466, filed Sep. 14, 2011, which is a annuum and/or C. frutescens. divisional of U.S. application Ser. No. 11/992,503, filed May 0008. It is well known, however, that strong crossing bar 19, 2008 (now U.S. Pat. No. 8,022.278), which is a U.S. riers of varying degree exist between the different species of National Phase Application of PCT/EP2005/054759, filed the Capsicum genus. Some crosses have even been proven Sep. 22, 2005. impossible, and other crosses are only possible with the help of in vitro culture techniques, such as embryo rescue. In FIELD OF THE INVENTION addition, in most cases the products derived from said crosses are completely or partially sterile which makes them not 0002 The present invention relates to a method for trans accessible for any further breeding purposes. ferring one or more genetic traits from a plant of the purple 0009. A need therefore exists for a method by which desir flowered Capsicum species comprising said genetic trait, to a able genetic traits can be transferred between the different plant of the white-flowered Capsicum species. The invention purple and white flowered Capsicum species. further relates to the plants perse, as well as to the fruits, seeds and other plant parts derived from said plants. SUMMARY OF THE INVENTION BACKGROUND OF THE INVENTION 0010. The object of the present invention is to provide a method for transferring one or more genetic traits, such as, but 0003. The genus Capsicum belongs to the large family of not limited to, resistance genes, from plants of the purple the Solanaceae. Several species of the Capsicum group are flowered Capsicum species to plants of the white-flowered valuable crops that are grown in open fields or underprotected Capsicum species. conditions in many countries all over the world. Capsicum species with pungent fruits are generally used as a spice, 0011. This is achieved by providing a method, comprising either fresh, dry or extracted. Species with non-pungent fruits the steps of: in a big variety of shapes and colours, commonly known as 0012 (a) preparing a first hybrid plant comprising said Sweet peppers, are widely used as Vegetable. genetic trait by crossing a first plant of the purple-flowered 0004. The genus Capsicum can be divided in two distinct Capsicum species comprising said genetic trait with a second groups based on the flower colour: the white-flowered group, plant of another purple-flowered Capsicum species, and comprising e.g. the closely related species C. annuum, C. selecting from the progeny thereof plants comprising said frutescens, C. baccatum, C. Chacoense, C. galapagoense, C. genetic trait; praetermissum and C. Chinense, and the purple-flowered 0013 (b) preparing a second hybrid plant by crossing said group, comprising e.g. C. to varii, C. pubescens, C. eximium first hybrid plant comprising said genetic trait, with a first and C. cardenasi. Of the white-flowered group Capsicum plant of the white-flowered Capsicum species: annuum, and its closely related species C. frutescens are the 0014 (c) crossing said second hybrid plant with said first best known domesticated species, which are mainly used for plant of the purple-flowered Capsicum species comprising the production of Sweet and hot peppers for processing and said genetic trait, and selecting from the progeny thereof consumption. plants comprising the genetic trait; 0005 Capsicum, like other plants, is attacked by many 00.15 (d) preparing a third hybrid plant by crossing the pests and diseases, including insects, nematodes, fungi, bac plants obtained step c) with a second plant of the white teria and viruses. One of such bacterial diseases is bacterial flowered Capsicum species, and selecting from the progeney leafspot, caused by the bacterium Xanthomonas campestris thereof plants comprising the genetic trait. pV. vesicatoria. Bacterial leafspot of Capsicum can be recog 0016. According to the present invention, for the first time nized by numerous angular spot on the leaves. Initially, the a genetic trait has been successfully transferred from a purple spots are water-soaked. Leaves infected at an early stage flowered Capsicum species to a white-flowered Capsicum become deformed. Often the margins of affected leaves are species. The method of the present invention is based on a rimmed with a narrow band of necrotic tissue. Infected Cap Suitable combination of several interspecific crosses, as well sicum leaves drop prematuraly, by which the fruit is exposed as crosses that serve as a kind of bridge to the next species to Sun which may result in Sun scald, secondary fruit rots and (FIG. 1). The desired genetic traits can for example be fol reduced yields. Capsicum fruits rarely show symptoms but lowed by molecular markers or bio-assay according to well may drop if infected early. known molecular biological techniques known to the skilled 0006 X. vesicatoria is widespread and damaging to Cap person. sicum in particular in field-grown crops in warm-temperate 0017. According to a preferred embodiment of the present and tropical countries, and thus has a large economic impact. invention, the method further comprises: Control of the disease relies principally on the production of 0018 (e) selecting plants obtained in step (d) not compris plants from healthy (treated) seeds and on preventive steps ing the genetic trait and crossing these plants with said first taken during the entire season. plant of the purple-flowered Capsicum species comprising 0007 Useful resistances to such diseases, as well as other said genetic trait, and selecting from the progeny thereof traits such as fruit quality characteristics etc., may exist in plants comprising the genetic trait; and US 2014/0223611 A1 Aug. 7, 2014 0019 (f) preparing a fourth hybrid plant by crossing the hybrids thereof, more preferably the second plant of the plants obtained step (e) with a second plant of the white white-flowered Capsicum species is C. Chinense, C. annuum flowered Capsicum species, and selecting from the prog and/or a hybrid thereof. eny thereof plants comprising the genetic trait. In this 0030.
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