两种土壤生境对不同小麦杂交组合F_2表现的影响

INFULENCE OF TWO SOIL ECOLOGICAL CONDITIONS ON THE PERFORMANCE OF DIFFERENT CROSSES IN COMMON WHEAT

在灌溉田和旱田２种生境下比较４个小麦杂交组合Ｆ２的抽穗期、开花期、株高、每株穗数、粒数和粒重６个农艺性状的变化差异。６个农艺性状旱田平均数均明显小于灌溉田；旱田小麦抽穗期、开花期一般提早约２～４ｄ，株高降低１３ｃｍ左右。灌溉条件下小麦抽穗、开花和株高遗传力旱田远比灌溉田为高。相关分析表明，在２种选择环境下，抽穗与开花，每株穗数、粒数和粒重之间相关几乎均达显著或极显著水平，但旱田小麦的这些性状相关似乎更密切。

Under the irrigated and non-irrigated and dry conditions in Laiyang Agric. College, acomparative study was carried out of the F2 plants from four crosses for various charactersThe results demonstrated that under non-irrigated and dry soil conditions the averagesfor each character were apparently smaller; Individal plants started earing and floweringabout two to four days earlier, and their heights decreased by around 13cm. On the irrigated land the crosses tended to have higher heritabilities for earing and flowering date andplant height, but lower ones for spike number, kernel number and kernel weight per plant.Correlation analysis indicated that almost all the characters studied appeared to possess astronger relationship on the dry conditions with nearly significant or close correlations between earing and flowering date, and among spike and kernel number and kernel weightper plant.