Inheritance of resistance to soybean cyst nematode races 3 and 14 in soybean RIL and F2 populations

Pesquisa Agropecuária Brasileira

Marcia Flores Da Silva²  Ivan Schuster¹  Gerardo Domingo Lucio Cervigni²  João Flávio Veloso Da Silva¹  Waldir Pereira Dias¹  Adésio Ferreira²  Everaldo Gonçalves De Barros²  Maurílio Alves Moreira² 

[1] ,Universidade Federal de Viçosa Instituto de Biotecnologia Aplicada à Agropecuária Viçosa MG ,Brazil

关键词: Glycine max;    Heterodera glycines;    improvement;    recombinant inbred lines;    soybean cyst nematode;    Glycine max;    Heterodera glycines;    melhoramento;    linhagem endogâmica recombinante;    nematóide do cisto da soja;   

DOI  :  10.1590/S0100-204X2007001200010

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the soybean inheritance of resistance to cyst nematode races 3 and 14. The following populations where evaluated: one population of recombinant inbred lines (RILs) [Hartwig (resistant) x Y23 (susceptible line)] for races 3, 14 and 9; one population of families F2:3 [M-SOY 8001 (resistant) x MB/BR 46 - Conquista (susceptible)] for race 3; and one population of families F2:3 [(S5995 (resistant) x BRSMG Renascença (susceptible)] for race 14. In RIL populations, four epistatic genes were identified which conditioned resistance to race 14, and three epistatic ones for resistance to races 3 and 9. The lack of one gene provided moderate resistance under all situations. The highest number of genes for resistance to race 14 points out that genes responsible for lower effects might be involved. In population F2:3 from M-SOY 8001 x MB/BR 46 - Conquista, one recessive gene for moderate resistance and two recessive genes complete resistance to race 3 were identified. Two recessive genes conditioning moderate resistance to race 14 were identified in population F2:3 from the crossing S5995 x BRSMG Renascença. These results will be useful in designing crossings, involving these parentals, with higher possibility to accumulating genes that provide resistance to several SCN races.

【 授权许可】

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