PDF
Full
Outline
Plant height (PH) is an important agronomic trait affecting lodging resistance and yield in wheat. To dissect the genetic basis of PH and identify stable loci, we analyzed a natural population of 339 wheat accessions from the Huang-Huai wheat region using PH phenotypes collected across nine environments and genotypes obtained with a 21K single nucleotide polymorphism (SNP) array. Genome-wide association study (GWAS) was conducted using a mixed linear model (MLM). Linkage disequilibrium (LD) and haplotype analyses were performed for the key associated interval, and the association was further validated in a natural population of 327 accessions genotyped with a 660K SNP array. Candidate genes within the target interval were annotated and prioritized. In total, 66 stable QTLs significantly associated with PH were identified. A novel major and stable QTL, QPh. nwafu-6D, was detected on chromosome 6D (490.34-492.42 Mb) and was consistently detected in eight environments, explaining 8.23% of the phenotypic variance on average. The interval was divided into two LD blocks. In Block2, three haplotypes were identified, and the favorable haplotype Block2_Hap1 (frequency 84.1%) showed significantly reduced PH compared with other haplotypes and was significantly associated with higher thousand-kernel weight in multiple environments. In the validation population, accessions carrying the Block2_Hap1 genotype at the core SNP marker SNP_Chr6D_492211566 exhibited significantly lower PH than those with the Block2_Hap2 genotype (P< 0.001). Eight candidate genes were further prioritized in this interval, mainly involved in kinase signaling, transcriptional regulation, ubiquitin-mediated protein degradation, and hormone responses.
PDF
35
12
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
