摘要
选用５个耐湿和３个不耐湿的小麦品种分别配制耐湿×耐湿、耐湿×不耐湿和不耐湿×不耐湿组合的６个群体，以过湿条件下主茎绿叶的枯衰程度为指标，研究杂交组合后代群体耐湿性的遗传特性及耐湿材料之间的遗传关系。结果表明，耐湿亲本对湿害的抗性受单个显性基因控制；耐湿品种之间杂种后代出现双亲具等位基因和非等位基因两种分离方式；不耐湿品种间杂交后代全部为不耐湿个体，双亲在耐湿性上无遗传差异。
Experiments were conducted to study inheritance of waterlogging tolerance in com on wheat by testing the tolerance in six populations of each of three types of cross combinations among highly tolerant and very susceptible genotypes,using the number of green leaves on the main stem as the screening criterion after overwetting treatment at the booting stage.All the F1 plsllts equalled the tolerant parents in Waterlogging to tolerance, and the F2 hybrids of tolerant/sus ceptible combinations segregated as the 3∶1 theoretical ratio, indicating that waterlogging toler ance was controlled by one dominant gene. The F2 hybrids of tolerant/tolerant combinations seg regating in mono- or poly-peak curves were allelic or non-allelic, respectively. The F2 hybrids of susceptible/susceptible combinations segregated in mono-peak curves, similar to their parents, in dicating there was no genetic difference in waterlogging tolerance in susceptible parents. These re sults were confirmed by backcrossing.
出处
《江苏农业学报》
CSCD
1995年第2期11-15,共5页
Jiangsu Journal of Agricultural Sciences
基金
国家"八五"攻关85-02-02-03项目
江苏省应用基础研究课题
关键词
小麦
耐湿性
遗传
wheat
waterlogging tolerance
inheritance
