Genetic architecture of quantitative trait loci (QTL) for FHB resistance and agronomic traits in a hard winter wheat population

IF 6 1区 农林科学 Q1 AGRONOMY
Yuzhou Xu , Yaoguang Li , Ruolin Bian , Guorong Zhang , Allan K. Fritz , Yanhong Dong , Lanfei Zhao , Yunfeng Xu , Nida Ghori , Amy Bernardo , Paul St. Amand , Jessica L. Shoup Rupp , Myron Bruce , Wei Wang , Eduard Akhunov , Brett Carver , Guihua Bai
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Abstract

Wheat resistance to Fusarium head blight (FHB) has often been associated with some undesirable agronomic traits. To study the relationship between wheat FHB resistance and agronomic traits, we constructed a linkage map of single nucleotide polymorphisms (SNPs) using an F6:8 population from G97252W × G97380A. The two hard winter wheat parents showed contrasts in FHB resistance, plant height (HT), heading date (HD), spike length (SL), spike compactness (SC), kernel number per spike (KNS), spikelet number per spike (SNS), thousand-grain weight (TGW) and grain size (length and width). Quantitative trait locus (QTL) mapping identified one major QTL (QFhb.hwwg-2DS) on chromosome arm 2DS for the percentage of symptomatic spikelets (PSS) in the spike, deoxynivalenol (DON) content and Fusarium damaged kernel (FDK). This QTL explained up to 71.8% of the phenotypic variation for the three FHB-related traits and overlapped with the major QTL for HT, HD, SL, KNS, SNS, TGW, and grain size. QTL on chromosome arms 2AL, 2DS, 3AL and 4BS were significant for the spike and grain traits measured. G97252W contributed FHB resistance and high SNS alleles at QFhb.hwwg-2DS, high KNS alleles at the QTL on 2AL and 2DS, and high TGW and grain size alleles at QTL on 3AL; whereas G97380A contributed high TGW and grain size alleles at the QTL on 2AL and 2DS, respectively, and the high KNS allele at the 4BS QTL. Combining QFhb.hwwg-2DS with positive alleles for spike and grain traits from other chromosomes may simultaneously improve FHB resistance and grain yield in new cultivars.

硬粒冬小麦群体中抗 FHB 和农艺性状的数量性状位点 (QTL) 的遗传结构
小麦对镰刀菌头枯病(FHB)的抗性往往与一些不良农艺性状有关。为了研究小麦 FHB 抗性与农艺性状之间的关系,我们利用 G97252W × G97380A 的 F6:8 群体构建了单核苷酸多态性(SNPs)连锁图。这两个硬冬小麦亲本在抗FHB、株高(HT)、穗期(HD)、穗长(SL)、穗紧密度(SC)、每穗粒数(KNS)、每穗小穗数(SNS)、千粒重(TGW)和籽粒大小(长和宽)方面表现出对比。定量性状基因座(QTL)图谱在染色体臂 2DS 上发现了一个主要的 QTL(QFhb.hwwg-2DS),它与穗中有症状小穗(PSS)的百分比、脱氧雪腐镰刀菌烯醇(DON)含量和镰刀菌损伤的籽粒(FDK)有关。该 QTL 解释了三个 FHB 相关性状高达 71.8% 的表型变异,并与 HT、HD、SL、KNS、SNS、TGW 和粒度的主要 QTL 重叠。染色体臂 2AL、2DS、3AL 和 4BS 上的 QTL 对测量的穗和谷粒性状有显著影响。G97252W 在 QFhb.hwwg-2DS 上贡献了 FHB 抗性和高 SNS 等位基因,在 2AL 和 2DS 上的 QTL 上贡献了高 KNS 等位基因,在 3AL 上的 QTL 上贡献了高 TGW 和谷粒大小等位基因;而 G97380A 分别在 2AL 和 2DS 上的 QTL 上贡献了高 TGW 和谷粒大小等位基因,在 4BS QTL 上贡献了高 KNS 等位基因。将 QFhb.hwwg-2DS 与其他染色体上的穗和谷粒性状的正等位基因结合,可同时提高新栽培品种的 FHB 抗性和谷粒产量。
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来源期刊
Crop Journal
Crop Journal Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
9.90
自引率
3.00%
发文量
638
审稿时长
41 days
期刊介绍: The major aims of The Crop Journal are to report recent progresses in crop sciences including crop genetics, breeding, agronomy, crop physiology, germplasm resources, grain chemistry, grain storage and processing, crop management practices, crop biotechnology, and biomathematics. The regular columns of the journal are Original Research Articles, Reviews, and Research Notes. The strict peer-review procedure will guarantee the academic level and raise the reputation of the journal. The readership of the journal is for crop science researchers, students of agricultural colleges and universities, and persons with similar academic levels.
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