论文部分内容阅读
从人工合成六倍体小麦SHW-L1改良后代中选育的5个春小麦新品系,在青海表现出比对照品种高原448更优的农艺性状和产量潜力,推测源于外源物种的野生不良性状被淘汰,保留在新品系中的外源染色体区段可能对遗传改良有贡献。为了了解源自人工合成小麦SHW-L1的外源染色体区段在这5个改良新品系中的分布,利用11 660个具有染色体位置信息的多态性DArTseq标记对这5个改良品系进行了外源染色体区段分析。结果表明,共检测到78个外源染色体区段,其中,65个为源于四倍体小麦的A和B基因组,13个为来自于节节麦的D基因组。24个源于四倍体小麦的外源染色体区段分布于3个以上的品系中,这些区段主要来自于A基因组,其中2A有8个,7A有4个,1A有3个,6A有3个。本研究材料来自于混合选择,不同品系共有的外源染色体区段可能含有对当前育种有价值的重要基因位点或基因簇,这样的区段将是下一步关注的重点。
Five new spring wheat lines selected from the improved hexaploid wheat SHW-L1 progenies showed better agronomic traits and yield potential in Qinghai than those of the control variety 448, and speculated that wild-type traits derived from exogenous species Was eliminated, exogenous chromosome segments retained in the new lines may contribute to genetic improvement. In order to understand the distribution of exogenous chromosome segments derived from synthetic wheat SHW-L1 in these five new improved lines, 11 660 polymorphic DArTseq markers with chromosomal location information were used to excise the five improved lines Source chromosome segment analysis. The results showed that a total of 78 exogenous chromosome segments were detected, of which 65 were derived from tetraploid A and B genomes and 13 were from D genomes derived from Arthropod. Twenty-four diploid wheat-derived exogenous chromosome segments were distributed in more than three lines, mainly from the A genome, with 8 of 2A, 4 of 7A, 3 of 1A, and 6A Three. The materials of this study come from mixed selection. The exogenous chromosome segments shared by different lines may contain important gene loci or gene clusters valuable to current breeding. Such segments will be the focus of next step.