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本文对8×8大麦品种双列杂交的F_1和F_2的抽穗期进行了遗传分析,结果:(1)抽穗期性状在F_1双列试验中,W_r/V_r回归系数b(0.8399)与单位斜率1无显著差异,表明符合加性-显性遗传模型,在F_2中,b=0.2768,显著不同于1,存在上位效应。去阵列8后,对F_2双列资料重新检验,发现由此获得的亚双列系统符合模型(b=0.8230).W_r/V_r分析表明,F_1与F_2世代间阵列位置有变动,但阵列2,3在两个世代中均据回归线的上部.W_r+V_r与Y_r间的相关测定均为负相关,表明抽穗期晚一般由显性基因效应控制.(2)抽穗期F_1和F_2的广义遗传力为97％与98％,狭义遗传力为87％与69％.在F_1为0.59,表明抽穗期晚为部分显性.F_2却大于1,示有超显性特点;H_2/4H_1值都小于0.25,说明全部有关座位上,平均地说,显隐性等位基因频率不相等.F_1值为负值,表明所有亲本所携带的隐性基因比显性基因要多. (3)抽穗期一般配合力效应为负向的有小将,早熟3号和永2830.特殊配合力存在较大负向优势的杂交组合中,必含小将、早熟三号和永2830三个早熟品种之一为杂交亲本.
In this paper, we analyzed the heading date of F_1 and F_2 of 8 × 8 barley crosses. Results: (1) The heading date of W_r / V_r regression coefficient b (0.8399) and unit slope 1 There was no significant difference, indicating that the additive-dominance genetic model was fitted. In F 2, b = 0.2768, which was significantly different from 1, with the epistatic effect. After array 8, the double row data of F_2 was re-tested and found that the resulting dual sub-row system conformed to the model (b = 0.8230) .W_r / V_r analysis showed that the positions of the arrays between F_1 and F_2 changed, 3 was in the upper part of the regression line in both generations.The correlation between Wr + Vr and Yr was negatively correlated, indicating that the heading stage was generally controlled by the dominant gene effect. (2) The general heritability of F_1 and F_2 at heading stage 97% and 98% respectively, and the narrow heritability was 87% and 69%, respectively.The F_1 was 0.59, indicating that the late heading stage was partly dominant, while that of F2 was greater than 1, indicating that the H_2 / 4H_1 values were less than 0.25 , Indicating that all the relevant seats, on average, significant frequency of recessive alleles.F_1 value is negative, indicating that all the parents carry more recessive genes than dominant genes.3) Heading general cooperation The effect of force is negative to the teenager, precocious 3 and Yong 2830. Special combining ability has a greater negative advantage of hybrid combinations, will include teenager, early maturing three and Yong 2830 three early maturing varieties of hybrid parents.