QTLs for resistance to soybean cyst nematode, races 3, 9, and 14 in cultivar Hartwig

Pesquisa Agropecuária Brasileira

Marcia Flores Da Silva Ferreira²  Gerardo Domingo Lucio Cervigni¹  Adésio Ferreira²  Ivan Schuster¹  Fernanda Abreu Santana¹  Waldir Dias Pereira¹  Everaldo Gonçalves De Barros¹  Maurilio Alves Moreira¹ 

[1] ,Universidade Federal do Espírito Santo Centro de Ciências Agrárias Departamento de Produção VegetalAlegre ES ,Brazil

关键词: Glycine max;    breeding;    marker-assisted selection;    molecular markers;    Glycine max;    melhoramento;    seleção assistida por marcadores;    marcadores moleculares;   

DOI  :  10.1590/S0100-204X2011000400012

来源: SciELO

【 摘 要 】

The objective of this work was to identify major and minor-effect quantitative trait loci (QTL) for resistance to races 3, 9, and 14 of soybean cyst nematode (SCN) in Hartwig cultivar; to map new resistance QTLs for these races; and to check for the existence of epistatic interactions between QTLs. Cultivar Hartwig is an important resistance source to SCN. Recombinant inbred lines (RIL) obtained from a cross between 'Hartwig' (resistant) and Y23 (susceptible) were evaluated regarding resistance to the three races. New genomic regions for resistance to SCN were identified by microsatellites. Four QTLs, which explained between 12 and 34% of phenotypic variance, were detected for resistance to race 3 in linkage groups (LG) A2, G, J, and M. The QTL in LG G is also important for resistance to race 9. Epistatic interactions were detected between loci, which indicate resistance to races 9 and 14. There are high and low-effect resistance QTLs to SCN.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License