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芒是普通小麦穗部重要的光合器官,麦芒在物种自然进化及人工选择育种中均有重要意义。为明确顶芒×全芒可能存在的遗传特性,本研究利用两个顶芒×全芒组合P1、P2、F1及F2世代对芒性状进行遗传分析,结果表明:86-741×13R478的F2群体顶芒:全芒符合3:1的分离比例,顶芒性状受一对显性基因控制。13P2651×13R376的F1代植株表现异于其全芒亲本13R376的全芒型,F2群体分离出13P2651、F1、13R376三种类型,符合1:2:1的比例,表明13P2651×13R376芒型呈半显性遗传模式。前人研究认为顶芒为完全显现性状,而本研究发现顶芒×全芒除显性遗传外,还存在半显性遗传模式,这一发现为完善麦芒研究和进一步基因定位奠定基础。
Mango is an important photosynthetic organ of common wheat spike. It has important significance in the natural evolution and artificial breeding of species. In order to understand the possible genetic characteristics of A. maxima, we analyzed the genetic characteristics of M. trachomatis using P1, P2, F1 and F2 combinations. The results showed that F2-population of 86-741 × 13R478 Top Mang: Mangshan line with the separation ratio of 3: 1, Top Mango trait by a dominant gene control. The F1 plants of 13P2651 × 13R376 were different from those of 13R376, and the F2 population isolated 13P2651, F1 and 13R376, which was in accordance with the ratio of 1: 2: 1, indicating that 13P2651 × 13R376 was half Dominant genetic pattern. In previous studies, Dominant mango plants were completely characterized, but in this study, Dominant plants were found to have semi-dominant inheritance patterns in addition to dominant inheritance. This finding laid the foundation for further studies and further gene mapping.