Genotypic Characterization of the U.S. Peanut Core Collection.

Autor: Otyama PI; Interdepartmental Genetics and Genomics, Iowa State University, Ames, IA.; Agronomy Department, Iowa State University, Ames, IA., Kulkarni R; Interdepartmental Genetics and Genomics, Iowa State University, Ames, IA.; Agronomy Department, Iowa State University, Ames, IA.; ORISE Fellow, Corn Insects and Crop Genetics Research Unit, USDA-ARS, Ames, IA., Chamberlin K; USDA - Agricultural Research Service, Stillwater, OK., Ozias-Akins P; Institute of Plant Breeding, Genetics, and Genomics and Department of Horticulture, University of Georgia, Tifton, GA., Chu Y; Institute of Plant Breeding, Genetics, and Genomics and Department of Horticulture, University of Georgia, Tifton, GA., Lincoln LM; USDA - Agricultural Research Service, Corn Insects and Crop Genetics Research Unit, Ames, IA., MacDonald GE; University of Florida, Gainesville, FL., Anglin NL; International Potato Center, Lima, Peru., Dash S; National Center for Genomic Resources, Santa Fe, NM., Bertioli DJ; Institute of Plant Breeding, Genetics, and Genomics and Department of Horticulture, University of Georgia, Tifton, GA., Fernández-Baca D; Department of Computer Science, Iowa State University, Ames, IA., Graham MA; Agronomy Department, Iowa State University, Ames, IA.; USDA - Agricultural Research Service, Corn Insects and Crop Genetics Research Unit, Ames, IA., Cannon SB; Agronomy Department, Iowa State University, Ames, IA.; USDA - Agricultural Research Service, Corn Insects and Crop Genetics Research Unit, Ames, IA., Cannon EKS; USDA - Agricultural Research Service, Corn Insects and Crop Genetics Research Unit, Ames, IA ethy.cannon@ars.usda.gov.
Jazyk: angličtina
Zdroj: G3 (Bethesda, Md.) [G3 (Bethesda)] 2020 Nov 05; Vol. 10 (11), pp. 4013-4026. Date of Electronic Publication: 2020 Nov 05.
DOI: 10.1534/g3.120.401306
Abstrakt: Cultivated peanut ( Arachis hypogaea ) is an important oil, food, and feed crop worldwide. The USDA peanut germplasm collection currently contains 8,982 accessions. In the 1990s, 812 accessions were selected as a core collection on the basis of phenotype and country of origin. The present study reports genotyping results for the entire available core collection. Each accession was genotyped with the Arachis_Axiom2 SNP array, yielding 14,430 high-quality, informative SNPs across the collection. Additionally, a subset of 253 accessions was replicated, using between two and five seeds per accession, to assess heterogeneity within these accessions. The genotypic diversity of the core is mostly captured in five genotypic clusters, which have some correspondence with botanical variety and market type. There is little genetic clustering by country of origin, reflecting peanut's rapid global dispersion in the 18 th and 19 th centuries. A genetic cluster associated with the hypogaea/aequatoriana/peruviana varieties, with accessions coming primarily from Bolivia, Peru, and Ecuador, is consistent with these having been the earliest landraces. The genetics, phenotypic characteristics, and biogeography are all consistent with previous reports of tetraploid peanut originating in Southeast Bolivia. Analysis of the genotype data indicates an early genetic radiation, followed by regional distribution of major genetic classes through South America, and then a global dissemination that retains much of the early genetic diversity in peanut. Comparison of the genotypic data relative to alleles from the diploid progenitors also indicates that subgenome exchanges, both large and small, have been major contributors to the genetic diversity in peanut.
(Copyright © 2020 Otyama et al.)
Databáze: MEDLINE
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