Exploring wheat landraces for rust resistance using a single marker scan
Exploring wheat landraces for rust resistance using a single marker scan
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DOI：
10.1007/s10681-013-0940-0
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发表时间：
2013-11-01
期刊：
影响因子：
1.9
通讯作者：
Bariana, Harbans S.
中科院分区：
文献类型：
--
作者：
Bansal, Urmil K.;Arief, Vivi N.;Bariana, Harbans S.
在不同种质中鉴定出的标记性状关联可用于作物改良计划。通过评估 205 个小麦地方品种在三个作物季节的田间对条锈病、叶锈病和茎锈病的反应，试图建立这种关联。使用多样性阵列技术对地方品种进行基因分型，并使用单标记扫描来鉴定关联性。 68 个标记与抗锈性显着相关。几个显着相关的基因座与已知的抗锈病主要基因或 QTL 的存在相一致。相比之下，在该分析中针对三种锈病中的每一种确定的许多标记-锈病反应关联都发现了新的位点。双重协会；还观察到条锈病-叶锈病（1AL、2BS、2BL、3DL、5BS、6BS和7DL）、叶锈病-茎锈病（5BL）和条锈病-茎锈病（4BL和6AS）的抗性。这些关联可以实现具有成本效益的双重防锈目标映射。本研究中确定的一些标记-性状关联已通过遗传分析和抗性位点的正式命名得到验证。
Marker-trait associations identified in diverse germplasm can be exploited in crop improvement programs. An attempt to establish such associations was made by evaluating 205 wheat landraces for stripe rust, leaf rust and stem rust responses in the field over three crop seasons. Diversity arrays technology was used to genotype the landraces and associations were identified using a single-marker scan. Sixty-eight markers were significantly associated with rust resistance. Several significantly associated loci coincided with the presence of known major genes or QTL for rust resistance. In contrast, many marker-rust response associations identified in this analysis for each of the three rust diseases uncovered new loci. Dual associations; stripe rust-leaf rust (1AL, 2BS, 2BL, 3DL, 5BS, 6BS and 7DL), leaf rust-stem rust (5BL) and stripe rust-stem rust (4BL and 6AS) resistance were also observed. These associations could enable a cost-effective targeted mapping of dual rust resistance. Some marker-trait associations identified in this study have been validated through genetic analyses and formal naming of resistance loci.