Dataset Information

Genetic Architecture of Soybean Yield and Agronomic Traits.

ABSTRACT: Soybean is the world's leading source of vegetable protein and demand for its seed continues to grow. Breeders have successfully increased soybean yield, but the genetic architecture of yield and key agronomic traits is poorly understood. We developed a 40-mating soybean nested association mapping (NAM) population of 5,600 inbred lines that were characterized by single nucleotide polymorphism (SNP) markers and six agronomic traits in field trials in 22 environments. Analysis of the yield, agronomic, and SNP data revealed 23 significant marker-trait associations for yield, 19 for maturity, 15 for plant height, 17 for plant lodging, and 29 for seed mass. A higher frequency of estimated positive yield alleles was evident from elite founder parents than from exotic founders, although unique desirable alleles from the exotic group were identified, demonstrating the value of expanding the genetic base of US soybean breeding.

SUBMITTER: Diers BW

PROVIDER: S-EPMC6169381 | biostudies-other | 2018 Oct

REPOSITORIES: biostudies-other

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Publications

Genetic Architecture of Soybean Yield and Agronomic Traits.

Diers Brian W BW Specht Jim J Rainey Katy Martin KM Cregan Perry P Song Qijian Q Ramasubramanian Vishnu V Graef George G Nelson Randall R Schapaugh William W Wang Dechun D Shannon Grover G McHale Leah L Kantartzi Stella K SK Xavier Alencar A Mian Rouf R Stupar Robert M RM Michno Jean-Michel JM An Yong-Qiang Charles YC Goettel Wolfgang W Ward Russell R Fox Carolyn C Lipka Alexander E AE Hyten David D Cary Troy T Beavis William D WD

G3 (Bethesda, Md.) 20181003 10

Soybean is the world's leading source of vegetable protein and demand for its seed continues to grow. Breeders have successfully increased soybean yield, but the genetic architecture of yield and key agronomic traits is poorly understood. We developed a 40-mating soybean nested association mapping (NAM) population of 5,600 inbred lines that were characterized by single nucleotide polymorphism (SNP) markers and six agronomic traits in field trials in 22 environments. Analysis of the yield, agrono ...[more]

PMID: 30131329

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Project description:BACKGROUND:Wheat mutant resources with phenotypic variation have been developed in recent years. These mutants might carry favorable mutation alleles, which have the potential to be utilized in the breeding process. Plant architecture and yield-related features are important agronomic traits for wheat breeders and mining favorable alleles of these traits will improve wheat characteristics. RESULTS:Here we used 190 wheat phenotypic mutants as material and by analyzing their SNP variation and phenotypic data, mutation alleles for plant architecture and yield-related traits were identified, and the genetic effects of these alleles were evaluated. In total, 32 mutation alleles, including three pleiotropic alleles, significantly associated with agronomic traits were identified from the 190 wheat mutant lines. The SNPs were distributed on 12 chromosomes and were associated with plant height (PH), tiller number, flag leaf angle (FLA), thousand grain weight (TGW), and other yield-related traits. Further phenotypic analysis of multiple lines carrying the same mutant allele was performed to determine the effect of the allele on the traits of interest. PH-associated SNPs on chromosomes 2BL, 3BS, 3DL, and 5DL might show additive effects, reducing PH by 10.0 cm to 31.3 cm compared with wild type, which means that these alleles may be favorable for wheat improvement. Only unfavorable mutation alleles that reduced TGW and tiller number were identified. A region on chromosome 5DL with mutation alleles for PH and TGW contained several long ncRNAs, and their sequences shared more than 90% identity with cytokinin oxidase/dehydrogenase genes. Some of the mutation alleles we mined were colocalized with previously reported QTLs or genes while others were novel; these novel alleles could also result in phenotypic variation. CONCLUSION:Our results demonstrate that favorable mutation alleles are present in mutant resources, and the region between 409.5 to 419.8 Mb on chromosome 5DL affects wheat plant height and thousand grain weight.

Dataset Information

Genetic Architecture of Soybean Yield and Agronomic Traits.

Publications

Genetic Architecture of Soybean Yield and Agronomic Traits.

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