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利用人工合成小麦基因资源与四川小麦杂交、回交,育成了优质、抗病小麦新品种“川麦38”。本文利用205对微卫星(SSR)引物检测“川麦38”遗传背景。其中21个位点来源于人工合成小麦亲本,占所用引物数的10.24%,远小于理论值25%。川麦38遗传背景中人工合成小麦导入位点在A、B和D染色体组分布频率不均衡,分布频率B组>A组>D组;人工合成小麦导入位点在“川麦38”各染色体间差异也很大,其中在1B和1A、5A染色体导入频率较高,而在2A等13条染色体上则无导入位点分布;人工选择压力可能是导致遗传位点出现偏分离行为的重要原因。
Utilizing synthetic genetic resources of wheat and crossing Sichuan wheat, backcrossed, bred new variety “Chuanmai 38” with high quality and disease resistance. In this paper, 205 pairs of microsatellite (SSR) primers were used to detect “Chuanmai38” genetic background. Among them, 21 loci originated from artificially synthesized wheat parents, accounting for 10.24% of the number of primers used, far less than the theoretical value of 25%. Chuanmai38 genetic background of synthetic wheat introduction site in the A, B and D chromosome group distribution frequency is not balanced, the distribution frequency of B group> A group> D group; synthetic wheat introduction sites in the “Chuanmai38” chromosome Among 1B and 1A, the frequency of chromosome 5A import was higher than that of other chromosomes such as 2A, but there was no introduction site on the 13 chromosomes such as 2A. Artificial selection pressure might be the important reason for the partial segregation of genetic sites .