摘要
利用来源于中间偃麦草(Elytrigiaintermedium)的八倍体小偃麦远中2和来源于四倍体长穗偃麦草(Elytrigiaelongatum)的六倍体小偃麦8801(AABBEE)杂交,结果表明正反交间结实率、F1出苗率均存在显著差异;F1植株多表现高度不育。通过F1花粉母细胞减数分裂染色体行为分析,发现杂种F1中染色体组主要构型为14Ⅱ+21Ⅰ(占观察细胞的40%左右),也有其他类型的构型,平均构型为:0.89Ⅲ+12.53Ⅱ(8.56Ⅱ+3.97Ⅱ)+21.07Ⅰ,从而确认远中2染色体组中不含有偃麦草的E组染色体。并初步认为远中2染体组型为AABBDDXX。
The reciprocal crosses between Yuanzhong 2(AABBDDFF), an octoploidy Triticum seet Trititrigia derived from Elytrigia intermedium and 8801(AABBEE), a line of hexaploidy Triticum seet Trititrigia derived from Elytrigia elongatum (4X) were conducted. The result showed that seedsetting percentage and seedling percentage of the crosses in F 1 generation were different significantly, and the F 1 plants were highly sterile. Based on the analysis of meiosis behavior of pollen mother cell of F 1 plant, the main chromsome pairing configuration was 14Ⅱ+2Ⅰ(taking up about 40% of observed cells). The maximum number of bivalent chromosome was only 14. The average chromsome pairing configuration was 0.89Ⅲ+12.53Ⅱ(8.56Ⅱ+3.97Ⅱ)+21.07Ⅰ.Thereby, we can confirm that the genome of Yuanzhong 2 excludes E genome derived from Elytrigia intermedium. We can preliminarily conclude the chromosome pattern of Yuanzhong 2 is AABBDDXX.
出处
《黑龙江农业科学》
1998年第3期4-7,共4页
Heilongjiang Agricultural Sciences
关键词
八倍体小偃麦
六倍体小偃麦
染色体
杂交
Elytrigia intermedium, Triticum seet Trititrigia octoploid, Triticum seet Trititrigia Hexaploid, Chromosome