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Proposed System of Nomenclature for Biotypes of Hessian Fly (Diptera: Cecidomyiidae) in North America F

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Proposed System of Nomenclature for Biotypes of Hessian Fly (Diptera: Cecidomyiidae) in North America F University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications: Department of Entomology Entomology, Department of 1992 Proposed System of Nomenclature for Biotypes of Hessian Fly (Diptera: Cecidomyiidae) in North America F. L. Patterson Purdue University John E. Foster University of Nebraska-Lincoln, [email protected] H. W. Ohm Purdue University J. H. Hatchett Kansas State University P. L. Taylor Purdue University Follow this and additional works at: http://digitalcommons.unl.edu/entomologyfacpub Part of the Entomology Commons Patterson, F. L.; Foster, John E.; Ohm, H. W.; Hatchett, J. H.; and Taylor, P. L., "Proposed System of Nomenclature for Biotypes of Hessian Fly (Diptera: Cecidomyiidae) in North America" (1992). Faculty Publications: Department of Entomology. 541. http://digitalcommons.unl.edu/entomologyfacpub/541 This Article is brought to you for free and open access by the Entomology, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications: Department of Entomology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. FORUM Proposed System of Nomenclature for Biotypes of Hessian Fly (Diptera: Cecidomyiidae) in North America F. L. PATTERSON, J. E. FOSTER,l H. W. OHM,2 J. H. HATCHETT,3 ANDP. L. TAYLOR4 Department of Agronomy, Purdue University, West Lafayette, Indiana 47907 J. Econ.Entomol.85(2): 307-311 (1992) ABSTRACT Twenty genes in wheat, Triticum spp., for resistance to Hessian fly, May- etiola destructor (Say),have been previously designated HI to H20. The location on wheat chromosomes of some of the genes is known, but several have not yet been assigned to specific chromosomes. Four wheat differential cultivars have been used to identify 16 possible biotypes of Hessian fly; biotypes were designated GP and A-O. If an additional differential host genotype were added, it is apparent that there are not enough letters in the alphabet to designate all of the biotypes. Therefore, a new system of biotype designation is proposed. Three differential cultivars or lines are assigned to a set. Sets are designated A, B, C, and so on. There are eight combinations of resistant and susceptible reactions within a set. These are coded 1 to 8 for each set. Three sets are proposed to begin biotype designation. A biotype avirulent to all differentials in three sets is coded 111. If set C were not used, a zero (untested) replaces the digit. In the above case, the biotype is designated 110.The biotype designation system provides flexibility for the addition ofnew sets as new genes are identified and for the deletion of sets no longer deemed useful. KEY WORDS Insecta, Mayetiola destructor, host plant resistance, wheat DAMAGETO WHEAT by the Hessian fly, Mayeti- Genes for Resistance. Twenty genes in wheat ola destructor (Say), may be controlled by breed- that condition resistance to Hessian fly have pre- ing resistant cultivars. The Hessian fly popula- viously been designated Hl to H20 (Table 1). All tion has been able to overcome single genes that show dominance or partial dominance for resis- condition resistance in wheat in =8-10 yr in tance except for one, which is recessive for resis- Indiana (Patterson et at. 1990). Current strategies tance and is designated h4. Four genes have are to monitor and predict Hessian fly biotype been assigned to linkage blocks on wheat chro- changes, to develop and maintain pure biotypes mosomes by cytogenetic methods. Using mono- for research, to locate new genes for resistance somic analyses, H6 was assigned to chromosome from common wheat, Triticum aestivum L.; du- 5A (Gallun & Patterson 1977), and H5 was as- rum wheat, T. durum Desfontaines; wild wheats, signed to chromosome lA (Roberts & Gallun Triticum spp.; and other grass species, and to 1984). H13 was assigned to chromosome 6DL, 35 deploy effective genes for resistance in new cul- ± 8 recombination units from the centromere, tivars. using telosomic analysis by Gill et at. (1987). The four purposes of this article are (1) to sum- H20 was assigned to chromosome 2B by aneu- marize the current status of Hessian fly biotypes ploid analysis using 'Langdon' durum wheat and known wheat genes for resistance, (2) to pro- D-genome disomic substitution lines (Amri et at. pose a new system of naming biotypes, (3) to 1990). select three sets of wheat differentials for identi- Most known genes for resistance to Hessian fly fying biotypes in North America, and (4) to com- are believed to be located on the A or B genomes pare the proposed and previous designations for based on durum wheat source or durum wheat current biotypes. parentage. Some genes have been assigned to linkage blocks on chromosomes by genetic link- age tests. H3 is linked to H6 at 9 recombination 1 Formerly Department of Entomologyand USDA-ARS, units (Patterson & Gallun 1977) and H3 with H9 PurdueUniversity.Currentaddress:Departmentof Entomol- at 15.5 ± 4.8 recombination units (Stebbins et al. ogy,Universityof Nebraska,Lincoln,Nebr.68583. 1980), with the probable gene order of H3 H6 H9 2 DepartmentofAgronomy,PurdueUniversity. on chromosome 5A (Stebbins et al. 1982). HlO 3 Departmentof Entomologyand USDA-ARS,KansasState University,Manhattan,Kans.66506. appeared to be on the same chromosome as H9, 4 FormerlyDepartmentof Entomology,PurdueUniversity. with 36 recombination units between the two, in 308 JOURNAL OF ECONOMIC ENTOMOLOGY Vol. 85, no. 2 Table 1. Wheat genes conditioning resistance to Hessian fly in the United States Gene Source Reference HI Dawson, CI 3342a Cartwright & Wiebe (1936) Noble & Suneson (1943) H2 Dawson, CI 3342a Cartwright & Wiebe (1936) Noble & Suneson (1943) H3 III, No.1, W-38 sel., Caldwell et a!. (1946) CI12061a h4 Java, CI 10051 a Suneson & Noble (1950) H5 Ribeiro, PI 56206-8a Shands & Cartwright (1953) H6 PI94587b Caldwell et a!. (1946) Allan et a!. (1959) H7 Seneca, CI 12529a Patterson & Gallun (1973) Cebert et al. (1988) H8 Seneca, CI 12529a Patterson & Gallun (1973) Cebert et a!. (1988) H9 Elva, CI 177I4b Carlson et a!. (1978) Stebbins et al. (1980) HIO Elva, CI 177I4b Carlson et a!. (1978) Stebbins et a!. (1980) Hll PI94587b Stebbins et a!. (1983) HI2 Luso, Port. 3478" Oellermann et a!. (1983) H13 Triticunl tauschii Hatchett et al. (1981) via HU 2076 Hatchett & Gill (1983) Gill et a!. (1987) Hl4 ELS 6404;,160, Maas et a!. (1989) CI 1764 HI5 ELS 6404-160, Maas et al. (1989) CI 17647b HI6 PI94587b Patterson et a!. (1988) Hl7 PI428435b Obanni et al. (1988) Hl8 Marquillo, CI 6887a Maas et a!. (1987) Obanni et a!. (1988) Hl9 PI422297b Obanni et a!. (1989) H20 Jorib Amri et a!. (1990 a Common wheat. b Durum wheat. an analysis following transfer of H9 H9 H10 H10 ship between resistance in the wheat plant and from the tetraploid to hexaploid wheat (Carlson avirulence in the Hessian fly has been described et al. 1978). H9 and HlO were found to be inde- (Hatchett & GaUun 1970). This allows biotypes pendently inherited in an analysis at the tetra- to be defined speCifically by their virulence or ploid level (Stebbins et al. 1982). H15 was found avirulence on wheat cultivars or lines with spe- to be closely associated with H9 (Maas et al. cifIc genes for resistance. GaUun (1977) noted 1989). Hll was reported to be linked with H5 on that using four differential cultivars, 16 biotypes 4 chromosome 1A with 4.4 ± 1.8% recombination (2 ) could be differentiated. Eleven of the bio- between the two genes (Stebbins et al. 1983). types have been identified in the field (Painter Obanni et al. (1988) reported that H17 may be 1930, Gallun et al. 1961, Hatchett 1969, Sosa located on chromosome 5A because H17 did not 1981, unpublished data). They designated the segregate independently from H9HlO of 'Elva'. biotypes GP and A-O. Twenty genes that condi- Linkages of H7, H8, H12, H14, H16, H18, or H19 tion resistance to Hessian fly have been identi- with genes in linkage blocks on chromosomes lA fied and named. The traditional use of alphabet- or 5A have not been reported, but all have not ical letters is inadequate to designate the been tested. None of the genes discussed above potential biotypes that may be identified as ad- has been reported as having been tested for link- ditional wheat genes for resistance are identi- age with H13 or H20 on chromosomes 6D and fied. 2B. Biotypes of Hessian Fly. Biotypes (formerly Materials and Methods caUed races) of Hessian fly in the United States that can arise from mutation or genetic recombi- Proposed Biotype Nomenclature. A system of nation in the Hessian fly (GaUun et al. 1961, using host plant sets composed of three differen- Gallun & Patterson 1981) have been designated tials is proposed with a digit to indicate the re- by capital letters based on their virulence or avir- actions of each host plant set. In concept, this is ulence on specific host wheat plants. The inter- similar to that proposed for identifying races of action between the insect and the host wheat Puccinia recondita f. sp. tritici Roberge ex. Des- plant is very specific. A gene-for-gene relation- mazieres (Long & Kolmer 1989). Eight host set April 1992 PATTERSON ET AL.: HESSIAN FLY BIOTYPE NOMENCLATURE 309 Table 2. Codes for host set reactions to Hessian fly There are some important reasons for continuing using three differential wheat hosts to use some historical cultivar as differentials based on previous biotype designation to relate Host differential" Host set the old and new systems of biotype designations. reaction code First Second Third The differential cultivars should represent the 1 R R R resistant wheat genes previously deployed, 2 R R S those genes currently deployed, those genes ex- 3 R S R 4 R S S pected to be deployed soon, and the additional 5 S R R genes recently identified.
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