用陆地棉四个杂交组合的亲本(P_1、P_2),F_1,F_2和回交后代(B_1、B_2)等群体估测了陆地棉纤维长度的广义(h~2b),狭义(h~2n)和广狭义(h~2bn)遗传力,并进行了置信区测定:又从其中一个组合的F_2群体中,按纤维长度选取了四群入选群分别繁殖后代(F_2),各入选群后代群体的平均绒长与F_2原始群体平均绒长的差数,即为各该入选群的实测遗传进度(△G),然后预测遗传进度:△G(2)=I·h~2,△G(b)=K·68√h~2;再用△G分别和△G(a)~s,△G(b)比较,获得差数,并进行卡方(X~2)试验,证明预测遗传进度与实际进度是符合的。 The generalized (h ~ 2b) and narrow (h ~ 2n) bands of Gossypium hirsutum (G. hirsutum L.) cultivars were estimated by using the parents (P 1, P 2), F 1, F 2 and backcross progeny (B 1, B 2) (H ~ 2bn) heritability, and the determination of confidence zone was carried out. From the F 2 population of one of the combinations, four groups of selected flocks were selected for their offspring (F_2) by fiber length, The difference between the average cashmere length and the average cashmere length of the original F_2 population is the measured genetic progress (ΔG) of each selected population, and then the genetic progress is estimated: ΔG (2) = I · h ~ 2, ΔG (b ) = K · 68√h ~ 2, then △ G and △ G (a) ~ s, △ G (b) were compared to obtain the difference and chi-square test In line with the actual progress.