Genetic diversity of wheat–rye 1BL.1RS translocation lines derived from different wheat and rye sources
Genetic diversity of wheat–rye 1BL.1RS translocation lines derived from different wheat and rye sources
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DOI：
10.1007/s10681-011-0412-3
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发表时间：
2011
期刊：
影响因子：
1.9
通讯作者：
T. Ren;Fang Chen;B. Yan;Huai-Qiong Zhang;Z. Ren
中科院分区：
文献类型：
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作者：
T. Ren;Fang Chen;B. Yan;Huai-Qiong Zhang;Z. Ren
许多研究已经确定了1BL.1RS易位对小麦各种性状的相对影响。研究了不同小麦品种(Triticum aestivumL.)遗传背景和黑麦(Secale graaleL.)1BL.1RS易位小麦农艺性状和终端品质性状不一致的主要因素是来源。然而，所有这些研究都是通过1BL.1RS易位完成的，这些易位具有不纯的小麦遗传基础和狭窄的黑麦起源。本研究的目的是利用来自不同纯小麦品系和黑麦源的初级1BL.1RS系来检验中心融合易位的遗传效应。用2个纯小麦品系与3个中国地方黑麦品种杂交，育成21个1BL.1RS易位系。然后对这些易位系及其亲本在中国西南部进行了鉴定。这些结果为参与1BL.1RS易位的不同小麦亲本和黑麦源在抗病性、农艺表现和终端品质性状上的不同效应提供了直接证据。来自同一小麦品系和不同黑麦品种的1BL.1RS易位具有最高的遗传多样性。结果表明，1BL.1RS易位系的遗传多样性可能来源于不同的小麦遗传背景、不同的黑麦源、它们之间的互作以及易位本身。创造多样化的1BL.1RS易位为在小麦中引入更多变异以改善表现提供了充分的可能性。
Many studies have been conducted to determine the relative effects of the 1BL.1RS translocation on various traits in wheat. The effects of different wheat (Triticum aestivumL.) genetic backgrounds and rye (Secale cerealeL.) sources have been addressed as major factors for inconsistent agronomic performance and end-use-quality traits of 1BL.1RS translocation wheats. However, all these studies were accomplished by using 1BL.1RS translocations with impure wheat genetic bases and narrow rye origins. The objective of this study was to test the genetic effects of centric fusion translocations by using primary 1BL.1RS lines derived from various pure wheat lines and rye sources. Twenty-one primary 1BL.1RS translocation lines were created from crosses between two pure wheat lines and three Chinese local rye varieties. These translocation lines and their wheat parents were then evaluated in southwestern China. The results provide direct evidence of the diverse effects of the different wheat parents and rye sources, taking part in 1BL.1RS translocations, on resistance to diseases, agronomic performance, and end-use quality traits. The highest amount of genetic diversity was observed in 1BL.1RS translocations derived from the same wheat lines and diverse rye varieties. The results suggest that the genetic diversity of 1BL.1RS translocation lines may originate from the different wheat genetic backgrounds, from different rye sources, from their interaction, and from the translocation itself. Creation of diverse 1BL.1RS translocations offers ample possibilities to introduce more variation into wheat for improved performance.