大豆抗SMV_1、SCN_3基因聚合选择方法的研究

A discussion on program for selection methods of anti-SCN_3 and anti-SMV_1 gene polymerized of soybean

采用抗大豆孢囊线虫 3号生理小种SCN3 和大豆花叶病毒 1号株系SMV1的大豆品种互交 ,F1F5用 5种不同选择方法 ,产量LSD 0 .0 5测定处理间表现为A、B、C三个等级 ;不同选择方法的 6个产量性状变异系数差距大。SCN3 和SMV1双抗性基因RSVRSN互作对产量具有累加增产效应达 8% 35 .9% ,品系产量和品系抗性基因聚合数量呈极显著正相关 (r=0 .972 )。不同选择方法F5RSVRSN出现率 0 % 10 0 %。双接种法或交叉接种法F5RSVRSN出现率 10 0 % ,株系间变异大 ,结合异季南繁加代 。

Using SCN 3×SMV 1 intercrossing, five treatments for F 1 to F 5 were adopted under different selection pressures. The yield determination (LSD0.05) among these treatments showed three classes A, B and C. The coefficient of variation of yield character with each selection method was significantly different. The resistant gene interaction of SCN 3 and SMV 1 had the additive effect for increased production, RSVRSN was 23.6% ~35.9%. The yield and quantity of resistant gene polymerized of strains were positively correlated, r=0.901 ** . F 5 RSVRSN apparent rate was 0%~100% under different selection methods.F 5 RSVRSN of double inoculation or cross inoculation was 100%, its variability among plants of each strain was great. It was a better selection method that can be combined with breeding and reproducing in southern areas of China and using an additional generation in another season.