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水稻性状遗传力的位次,在不同估算方法(广义法、迴归及相关法、变量分析法)间,除一穗粒数、粒重有出入外,其它几个性状都有一致的趋势,即抽穗日数最高,株高、穗长次之,空壳率、穗数及穗重最低。性状间的相关程度因组合而异,遗传相关一般高于表现型相关,两者的正负方向大体相同。性状遗传进度的大小决定于遗传力及遗传变异幅度,在5%选择强度下,性状的遗传进度,组合间有显著的差异。性状遗传进度间的相关表明,向矮稈选择时,后代会引起早熟、一穗粒数减少等现象。选择指数的效果因其构成而不同,应用具有较高效率的选择指数,分别算出各系统的综合评价点数,以判断系统的丰产价值。
The order of heritability of rice traits was consistent among different estimation methods (generalized method, regression and correlation method, and variable analysis method) except for the number of grain per spike and grain weight, The highest number of heading days, plant height, spike length, shell percentage, spike number and ear weight minimum. The correlation between the traits varies with the combination, the genetic correlation is generally higher than the phenotype related, the two positive and negative directions are generally the same. The size of the trait of genetic traits depends on the heritability and the range of genetic variation. Under the 5% selective intensity, the genetic progress of traits and the combinations have significant differences. The correlation between the genetic progress of the traits shows that the progeny will cause the phenomenon of prematurity and the reduction of grain number per spike to dwarf selection. The effect of selection index is different due to its composition, and the selection index with higher efficiency is applied to calculate the comprehensive evaluation points of each system separately to determine the system’s high yield value.