Molecular analysis of Sorghum resistance to the greenbug (Homoptera: Aphididae)

被引:27
作者
Katsar, CS [1 ]
Paterson, AH
Teetes, GL
Peterson, GC
机构
[1] Pioneer HiBred Int Inc, Johnston, IA 50131 USA
[2] Univ Georgia, Dept Crop & Soil Sci, Athens, GA 30602 USA
[3] Texas A&M Univ, Dept Entomol, College Stn, TX 77843 USA
[4] Texas A&M Univ, Ctr Agr Res & Extens, Lubbock, TX 79401 USA
关键词
Schizaphis graminum; Sorghum bicolor; plant resistance; molecular genetics; restriction fragment-length polymorphism; biotype;
D O I
10.1603/0022-0493-95.2.448
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Chromosomal regions of sorghum, Sorghum bicolor (L.) Moench, conferring resistance to greenbug, S, hizaphis graminum (Rondani), biotypes C, E, I, and K from four resistance sources were evaluated by restriction fragment-length polymorphism (RFLP) analysis. At least nine loci, dispersed on eight linkage groups, were implicated in affecting sorghum resistance to greenbug. The nine loci were named according to the genus of the host plant (Sorghum) and greenbug (Schizaphis graminum). Most resistance loci were additive or incompletely dominant. Several digenic interactions were identified, and in each case, these nonadditive interactions accounted for a greater portion of the resistance phenotype than did independently acting loci. One locus in three of the four sorghum crosses appeared responsible for a large portion of resistance to greenbug biotypes C and E. None of the loci identified were effective against all biotypes studied. Correspondingly, the RFLP results indicated resistance from disparate sorghums may be a consequence of allelic variation at particular loci. To prove this, it will be necessary to fine map and clone genes for resistance to greenbug from various sorghum sources.
引用
收藏
页码:448 / 457
页数:10
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