Identification of major loci for seed dormancy at different post-ripening stages after harvest and validation of a novel locus on chromosome 2AL in common wheat

Zhu, Yanfang; Wang, Shengxing; Zhang, Haiping; Zhao, Liangxia; Wu, Zeng-Yun; Jiang, Hao; Cao, Junhui; Liu, Kai; Qin, Meng; Lu, Jie; Sun, Genlou; Xia, Xianchun; Chang, Cheng; Ma, Chunyan

doi:10.1007/s11032-016-0598-0

Cited by 16 publications

(8 citation statements)

References 55 publications

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“…On the other hand, many marker-trait associations (MTAs) for grain yield and related traits have also been identified under various genetic backgrounds [ 11 – 20 ]. Compared with bi-parental population mapping largely limited by bi-parental genetic background, genome-wide association study (GWAS) based on linkage disequilibrium is an effective approach to identify abundant genetic loci for complex traits in diverse natural populations because of their abundant genetic backgrounds [ 20 – 21 ].…”

Section: Introductionmentioning

confidence: 99%

Genome-wide association study for grain yield and related traits in elite wheat varieties and advanced lines using SNP markers

et al. 2017

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Genetic improvement of grain yield is always an important objective in wheat breeding. Here, a genome-wide association study was conducted to parse the complex genetic composition of yield-related traits of 105 elite wheat varieties (lines) using the Wheat 90K Illumina iSelect SNP array. Nine yield-related traits, including maximum number of shoots per square meter (MSN), effective number of spikes per square meter (ESN), percentage of effective spike (PES), number of kernels per spike (KPS), thousand-kernel weight (TKW), the ratio of kernel length/kernel width (RLW), leaf-area index (LAI), plant height (PH), and grain yield (GY), were evaluated across four environments. Twenty four highly significant marker-trait associations (MTAs) (P < 0.001) were identified for nine yield-related traits on chromosomes 1A, 1D, 2A (2), 3B, 4A (2), 4B, 5A (4), 5B (4), 5D, 6B (2), 7A (2), and 7B (3), explaining 10.86–20.27% of the phenotypic variations. Of these, four major loci were identified in more than three environments, including one locus for RLW (6B), one locus for TKW (7A), and two loci for PH (7B). A cleaved amplified polymorphic sequence (CAPS) marker Td99211 for TKW on chromosome 5A was developed and validated in both a natural population composed of 372 wheat varieties (lines) and a RIL population derived from the cross of Yangxiaomai × Zhongyou 9507. The CAPS marker developed can be directly used for marker-assisted selection in wheat breeding, and the major MTAs identified can provide useful information for fine-mapping of the target genes in future studies.

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Section: Introductionmentioning

confidence: 99%

Genome-wide association study for grain yield and related traits in elite wheat varieties and advanced lines using SNP markers

et al. 2017

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“…Cultivars with the low-GI allele showed higher PHS resistance than those with the contrasting high-GI allele for each gene examined, which is in agreement with the previous studies [ 16 , 18 – 22 , 26 – 29 ]. However, the level of PHS resistance between the contrasting alleles at certain genes varied in different genetic backgrounds [ 38 ]. For example, a main-effect locus TaMKK3-A associated with PHS resistance was identified in different populations and explained 30–38% phenotypic variations [ 10 ].…”

Section: Discussionmentioning

confidence: 99%

Identification of effective alleles and haplotypes conferring pre-harvest sprouting resistance in winter wheat cultivars

et al. 2022

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Background Pre-harvest sprouting (PHS) is a serious limiting factor for wheat (Triticum aestivum L.) grain yield and end-use quality. Identification of reliable molecular markers and PHS-resistant germplasms is vital to improve PHS resistance by molecular marker-assisted selection (MAS), but the effects of allelic variation and haplotypes in genes conferring PHS resistance in winter wheat cultivars are less understood. Results Resistance to PHS was tested in 326 commercial winter wheat cultivars for three consecutive growing seasons from 2018–2020. The effects of alleles and haplotypes of 10 genes associated with PHS resistance were determined for all cultivars and were validated by introgressing the PHS-resistance allele and haplotype into a susceptible wheat cultivar. High level of phenotypic variation in PHS resistance was observed in this set of cultivars and 8 of them were highly resistant to PHS with stable germination index (GI) of less than 25% in each individual year. Allelic effects of nine genes and TaMFT haplotype analysis demonstrated that the haplotype Hap1 with low-GI alleles at five positions had the best PHS resistance. This haplotype has the priority to use in improving PHS resistance because of its high effectiveness and rare present in the current commercial cultivars. Among 14 main allelic combinations (ACs) identified, the AC1 carrying the haplotype Hap1 and the TaSdr-B1a allele had better PHS resistance than the other classes. The introgression of Hap1 and TaSdr-B1a is able to significantly improve the PHS resistance in the susceptible cultivar Lunxuan 13. Conclusions The effectiveness of alleles conferring PHS resistance in winter wheat cultivars was determined and the useful alleles and haplotypes were identified, providing valuable information for parental selection and MAS aiming at improving PHS-resistance in winter wheat. The identification of the PHS-resistant cultivars without known resistance alleles offers an opportunity to explore new PHS-resistant genes.

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“…Therefore, the genetic regulation mechanism of seed dormancy is often taken as the main content when studying the mechanism of PHS resistance in previous reports. Many studies have found that PHS resistance/seed dormancy is controlled by multiple genes, which are distributed across 21 chromosomes of wheat [ 13 , 14 , 15 , 16 , 17 ]. Therefore, the leading approaches and strategies to combat the risk of PHS involve breeding and applying the PHS-resistant wheat variety.…”

Section: Introductionmentioning

confidence: 99%

Genetic Improvement of Wheat with Pre-Harvest Sprouting Resistance in China

Chang

Zhang

et al. 2023

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Wheat pre-harvest sprouting (PHS) refers to the germination of seeds directly on the spike due to rainy weather before harvest, which often results in yield reduction, quality deterioration, and seed value loss. In this study, we reviewed the research progress in the quantitative trait loci (QTL) detection and gene excavation related to PHS resistance in wheat. Simultaneously, the identification and creation of germplasm resources and the breeding of wheat with PHS resistance were expounded in this study. Furthermore, we also discussed the prospect of molecular breeding during genetic improvement of PHS-resistant wheat.

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Identification of major loci for seed dormancy at different post-ripening stages after harvest and validation of a novel locus on chromosome 2AL in common wheat

Cited by 16 publications

References 55 publications

Genome-wide association study for grain yield and related traits in elite wheat varieties and advanced lines using SNP markers

Genome-wide association study for grain yield and related traits in elite wheat varieties and advanced lines using SNP markers

Identification of effective alleles and haplotypes conferring pre-harvest sprouting resistance in winter wheat cultivars

Genetic Improvement of Wheat with Pre-Harvest Sprouting Resistance in China

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