小麦叶倾角遗传的初步研究

A Primary Study on the Inheritances of Wheat Leaf Inclination Angle

选用叶片形态差异悬殊的 1 0个小麦品种 (系 ) ,研究了上三叶倾角的遗传参数及与其它性状的遗传相关。结果表明 :小麦旗叶倾角的遗传变异系数、广义遗传力和相对遗传进度较高 ,选择效果较好 ;旗叶基角与倒二叶、倒三叶基角的表型和遗传相关均达极显著水平 ,倒二叶披垂度与倒三叶披垂度也表现为极显著的正相关 ,讨论了高产品种应具备的叶片形态。

Ten winter wheat cultivars with different leaf types were used to study genetic parameters of the top three leaf inclination angles and genetic correlations between the top three leaf inclination angles and other characters. The genetic variance coefficients, broad sense-heritability and relative genetic advances of flag leaf inclination angles were high, and their selective effect was better. There were highly significant positive correlations between flag leaf basic angle and basic angle of top second leaf, between flag leaf basic angle and basic angle of top third leaf, between droop angle of top second leaf and that of top third leaf. The leaf shape that high-yield-varieties should possessed was discussed.