论文部分内容阅读
本试验对9个二棱大麦(Hordeum distichum L.)品种所组成的9×9半双列杂交F_1的8个冠层形态性状进行了遗传分析。结果表明,供试亲本中,各性状存在着广泛的遗传变异。旗叶的叶宽、基角、开张角和颈粗主要受加性基因控制;旗叶的叶长、叶面积,穗下节长、节粗受加性基因和显性基因共同控制。其中,穗下节长的显性基因作用大于加性基因作用(H_1>D);穗下节长表现为超显性,其余性状都为不完全显性;在9个亲本中,旗叶叶宽的显性基因起增值作用,其余性状显性基因作用方向不一致。各性状的狭义遗传力均较高(72.46％-88.48％)。穗下节长、节粗、颈粗与主穗粒重、粒数、单粒重均呈极显著正相关;旗叶叶长、叶面积与主穗粒重和单粒重呈极显著正相关;旗叶基角、开张角仅与主穗粒数呈极显著正相关;旗叶叶宽与所分析的三个产量性状均无显著相关。
In this study, 8 canopy morphological traits of 9 × 9 semi-diallel cross F1 hybrids consisting of 9 varieties of Hordeum distichum L. were genotyped. The results showed that there was a wide range of genetic variation among the tested parents. Flag leaf width, base angle, opening angle and neck thickness are mainly controlled by additive genes; flag leaf length, leaf area, spike length, nodules by additive genes and dominant genes under the common control. Among them, the dominant gene of spike length was larger than that of additive gene (H_1> D); the length of spike length of spikelet was over dominant, and the rest of the characters were not completely dominant; among 9 parents, flag leaf Wide dominant genes play a role in value-added, while the remaining dominant genes act in different directions. The narrow heritability of each trait was higher (72.46% -88.48%). There was a significant positive correlation between the length of node, the node diameter and the neck thickness of the main spike and the grain weight, number of grains and single grain weight of flag leaf. The length of flag leaf and leaf area were significantly and positively correlated with the grain weight of main spike and single grain weight ; Flag leaf base angle and opening angle only had a significant positive correlation with the number of main ear kernels; There was no significant correlation between flag leaf width and the three yield traits analyzed.