Yr29 combined with QYr.nwafu-4BL.3 confers durable resistance to stripe rust in wheat cultivar Jing 411.

IF 4.4 1区 农林科学 Q1 AGRONOMY
Mingjie Xiang, Bo Tian, Jianghao Cao, Shengjie Liu, Caie Zhou, Xiaoting Wang, Yibo Zhang, Jiale Li, Xunying Yuan, Jufen Wan, Rui Yu, Weijun Zheng, Jianhui Wu, Qingdong Zeng, Zhensheng Kang, Chunlian Li, Fa Cui, Dejun Han
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引用次数: 0

Abstract

Key message: The combination of a QTL on chromosome arm 4BL and Yr29 provides durable resistance with no significant yield penalty. Wheat stripe rust or yellow rust (YR), caused by Puccinia striiformis f. sp. tritici (Pst), causes substantial yield reductions globally, but losses can be minimized by using resistance genes. Chinese wheat cultivar Jing 411 (J411) has continued to display an acceptable level of adult-plant resistance (APR) to YR in varied field conditions since its release in the 1990s. A recombinant inbred line (RIL) population comprising 187 lines developed from a cross of J411 and Kenong 9204 (KN9204) was evaluated in multiple environments to identify genomic regions carrying genes for YR resistance. A total of five quantitative trait loci (QTL) on chromosome arm 1BL, 3BS, 4BL, 6BS, and 7BL from J411 and two QTL on 3DS and 7DL from KN9204 were detected using inclusive composite interval mapping with the wheat 660 K SNP array. QYr.nwafu-1BL.5 and QYr.nwafu-4BL.3 from J411 were robust and showed similar effects in all environments. QYr.nwafu-1BL.5 was likely the pleiotropic gene of Yr29/Lr46. QYr.nwafu-4BL.3 was located within a 1.0 cM interval delimited by KASP markers AX-111609222 and AX-89755491. Based on haplotype analysis, Yr29 and QYr.nwafu-4BL.3 were identified as genetic components of quantitative resistance in a number of wheat cultivars. Moreover, RILs with Yr29 and QYr.nwafu-4BL.3 individually or when combined showed higher resistance to YR in rust nurseries compared with RILs without them, and there was no negative effect of their presence on agronomic traits under rust-free conditions. These results suggest that effective polymerization strategy is important for breeding high yielding and durable resistance cultivars.

Yr29与QYr.nwafu-4BL.3结合可赋予小麦品种京411对条锈病的持久抗性。
关键信息:染色体臂 4BL 上的 QTL 与 Yr29 的结合可提供持久的抗性,且不会造成显著的产量损失。由Puccinia striiformis f. sp. tritici (Pst)引起的小麦条锈病或黄锈病(YR)在全球范围内造成大幅减产,但通过使用抗性基因可将损失降至最低。中国小麦栽培品种京 411(J411)自 20 世纪 90 年代发布以来,在不同的田间条件下持续表现出可接受的成株抗性(APR)。我们在多种环境中评估了由 J411 和 Kenong 9204(KN9204)杂交育成的 187 个品系组成的重组近交系(RIL)群体,以确定携带抗 YR 基因的基因组区域。利用小麦 660 K SNP 阵列的包容性复合间隔图谱,在 J411 的染色体臂 1BL、3BS、4BL、6BS 和 7BL 上共检测到五个数量性状位点(QTL),在 KN9204 的 3DS 和 7DL 上检测到两个 QTL。来自J411的QYr.nwafu-1BL.5和QYr.nwafu-4BL.3是稳健的,在所有环境中都表现出相似的效应。QYr.nwafu-1BL.5可能是Yr29/Lr46的多效基因。QYr.nwafu-4BL.3 位于由 KASP 标记 AX-111609222 和 AX-89755491 限定的 1.0 cM 区间内。根据单倍型分析,Yr29 和 QYr.nwafu-4BL.3 被确定为多个小麦栽培品种的数量抗性遗传成分。此外,与不含Yr29和QYr.nwafu-4BL.3的RIL相比,单独或组合含Yr29和QYr.nwafu-4BL.3的RIL在锈病苗圃中对YR表现出更高的抗性,而且在无锈病条件下,它们的存在对农艺性状没有负面影响。这些结果表明,有效的聚合策略对于培育高产、耐久的抗性栽培品种非常重要。
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来源期刊
CiteScore
9.60
自引率
7.40%
发文量
241
审稿时长
2.3 months
期刊介绍: Theoretical and Applied Genetics publishes original research and review articles in all key areas of modern plant genetics, plant genomics and plant biotechnology. All work needs to have a clear genetic component and significant impact on plant breeding. Theoretical considerations are only accepted in combination with new experimental data and/or if they indicate a relevant application in plant genetics or breeding. Emphasizing the practical, the journal focuses on research into leading crop plants and articles presenting innovative approaches.
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