文献类型： 外文期刊

第一作者： Yang GuoHui

作者： Yang GuoHui;Yang XinMing;Wang RuiHui;Gao AiNong;Li LiHui;Liu WeiHua

作者机构：

关键词： wheat-Agropyron cristatum addition line;P chromosome;Ph gene;homoeologous chromosome synapsis

期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）

ISSN： 1001-6538

年卷期： 2010 年 55 卷 2 期

页码：

收录情况： SCI

摘要： P chromosomes may carry a genetic system that inhibits the Ph gene in wheat. Abnormal chromosome synapsis in wheat-Agropyron cristatum addition line II-21-2 (additional 1.4 recombinant P chromosome) was observed in this study. The results of cytogenetics and Ph1 gene amplification showed that the Ph1 gene was normal and the average number of quadrivalents or hexavalents; was determined to be 0.41 and 0.13, respectively, in pollen-mother cells of wheat-Agropyron cristatum addition line II-21-2. The analysis of dual-color GISH/FISH showed that the P chromosomes were not directly involved in the composition of multivalents but could inhibit the effect of the Ph gene, leading to synapsis of wheat homoeologous chromosomes and translocation between wheat homoeologous chromosomes such as 3B-3D chromosomes. The characteristic of P chromosomes' promoting synapsis of wheat homoeologous chromosomes may have potential application in the genetic improvement of wheat.

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