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分别以双隐性核不育类型(P_1)和单隐性核不育类型(P_2)陆地棉材料不育株为母本,与8个父本配制组合,从中亲优势、超亲优势和竞争优势方面考察P_1和P_2在杂种优势方面的差异;用NCⅡ交叉法比较了P_1和P_2在产量、品质和抗病性方面的14个指标的配合力差异;用Topsis评价法对P_1和P_2进行综合比较。结果表明:P_1和P_2的中亲优势均较明显,但超亲优势和竞争优势方面综合表现均不突出;两者的超亲优势和竞争优势中仅品质方面优势较强,而P_1的黄萎病指相对最低,P_2的吐絮集中率相对最差;P1的一般配合力总体上要好于P_2,前者优势在于产量方面,后者优势在于品质和抗病性方面,但P_1综合性状的潜能不及P_2;综合评价表明,P_2的综合特性要好于_P1。在两种不同核基因类型材料育种改良时,P_1应注意加强抗病性的提高,P_2应注意加强产量特性的提高。
The male sterile lines of double recessive nuclear sterile type (P_1) and single recessive sterile line type (P_2) of Upland cotton were used as the female parent to combine with the eight male parents. The results showed that the progenies, heterosis and competition Differences in heterosis between P 1 and P 2 were investigated in terms of their advantages. The differences in combining ability of 14 markers between P 1 and P 2 in yield, quality and disease resistance were analyzed by NCⅡ cross method. P 1 and P 2 were integrated by Topsis evaluation Compare The results showed that: P_1 and P_2 are more obvious in the pro-parents, but super-pro and competitive advantages are not outstanding; super-parents and competitive advantages of both quality only strong advantage, and P_1 Verticillium wilt P II was the poorest. The general combining ability of P1 was generally better than that of P 2. The former had the advantage of yield and the latter had the advantage of quality and disease resistance. However, the potential of P 1 was less than that of P 2 The comprehensive evaluation shows that the comprehensive characteristic of P_2 is better than that of _P1. In improving the breeding of two different nuclear genotypes, P_1 should pay attention to enhancing the disease resistance, and P_2 should pay attention to enhancing the yield characteristics.