A novel quantitative trait locus for barley yellow dwarf virus resistance and kernel traits on chromosome 2D of a wheat cultivar Jagger.

IF 3.9 2区生物学 Q1 GENETICS & HEREDITY

Plant Genome Pub Date : 2025-03-01 DOI:10.1002/tpg2.20548

Ruolin Bian, Na Liu, Yuzhou Xu, Zhenqi Su, Lingling Chai, Amy Bernardo, Paul St Amand, Jessica Rupp, Michael Pumphrey, Allan Fritz, Guorong Zhang, Katherine W Jordan, Guihua Bai

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引用次数: 0

Abstract

Barley yellow dwarf (BYD) is one of the most serious viral diseases in cereal crops worldwide. Identification of quantitative trait loci (QTLs) underlining wheat resistance to barley yellow dwarf virus (BYDV) is essential for breeding BYDV-tolerant wheat cultivars. In this study, a recombinant inbred line (RIL) population was developed from the cross between Jagger (PI 593688) and a Jagger mutant (JagMut1095). A linkage map of 3106 cM consisting of 21 wheat chromosomes was developed using 1003 unique single nucleotide polymorphisms (SNPs) from the RIL population and was used to identify QTLs for BYDV resistance and yield-related traits, including 1000-kernel weight (TKW), kernel area (KA), kernel width (KW), and kernel length (KL). QByd.hwwg-2DL, a QTL on chromosome arm 2DL for BYDV resistance, was consistently identified in three field experiments and explained 11.6%-44.5% of the phenotypic variation. For yield-related traits, six major and repeatable QTLs were identified on 1AS (QKa.hwwg-1AS), 2DL (QTkw.hwwg-2DL, QKa.hwwg-2DL, QKw.hwwg-2DL, and QKl.hwwg-2DL), and 5AL (QKw.hwwg-5AL). The major QTLs on chromosome 2DL for TKW, KA, KW, and KL were mapped between 621 and 643 Mb, overlapping with QByd.hwwg-2DL with all the favorable alleles from Jagger. This study reports the first native BYDV resistance QTL (QByd.hwwg-2DL) originating from common wheat and tightly linked markers to the QTL for improvement of wheat BYDV resistance in wheat breeding.

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大麦抗黄矮病毒数量性状的新位点及其籽粒性状在贾格尔2号染色体上的定位。

大麦黄矮病（BYD）是世界上最严重的谷类作物病毒性病害之一。小麦抗大麦黄矮病毒（BYDV）数量性状位点的鉴定是选育抗BYDV小麦品种的基础。本研究利用Jagger （PI 593688）与Jagger突变体JagMut1095杂交，构建了重组自交系（RIL）群体。利用RIL群体1003个独特的单核苷酸多态性（SNPs），构建了21条小麦染色体3106 cM的连锁图谱，并利用该图谱鉴定了千粒重（TKW）、粒面积（KA）、粒宽（KW）和粒长（KL）等抗BYDV和产量相关性状的qtl。QByd。hwwg-2DL是位于第2DL染色体臂上的一个与BYDV抗性相关的QTL，在3个田间实验中得到一致鉴定，解释了11.6% ~ 44.5%的表型变异。在产量相关性状中，鉴定出6个主要且可重复的qtl，分别位于1AS （QKa.hwwg-1AS）、2DL （QTkw）和2DL （QTkw）上。hwwg-2DL QKa。hwwg-2DL QKw。hwwg-2DL （QKl.hwwg-2DL）和5AL （QKw.hwwg-5AL）。2DL染色体上TKW、KA、KW和KL的主要qtl定位在621 ~ 643 Mb之间，与QByd重叠。hwwg-2DL与Jagger的所有有利等位基因。本研究报道了首个来自普通小麦的抗BYDV QTL (QByd.hwwg-2DL)，以及小麦育种中用于提高小麦抗BYDV QTL的紧密连锁标记。

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来源期刊

Plant Genome PLANT SCIENCES-GENETICS & HEREDITY

CiteScore

6.00

自引率

4.80%

发文量

审稿时长

>12 weeks

期刊介绍： The Plant Genome publishes original research investigating all aspects of plant genomics. Technical breakthroughs reporting improvements in the efficiency and speed of acquiring and interpreting plant genomics data are welcome. The editorial board gives preference to novel reports that use innovative genomic applications that advance our understanding of plant biology that may have applications to crop improvement. The journal also publishes invited review articles and perspectives that offer insight and commentary on recent advances in genomics and their potential for agronomic improvement.