Characterizing the impact of an exotic soybean line on elite cultivar development.

Autor: Stewart-Brown BB; Department of Crop and Soil Sciences, Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA, United States of America., Vaughn JN; Genomics and Bioinformatics Research Unit, USDA-ARS, Athens, GA, United States of America., Carter TE Jr; Soybean & Nitrogen Fixation Unit, USDA-ARS, Raleigh, NC, United States of America., Li Z; Department of Crop and Soil Sciences, Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA, United States of America.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2020 Jul 10; Vol. 15 (7), pp. e0235434. Date of Electronic Publication: 2020 Jul 10 (Print Publication: 2020).
DOI: 10.1371/journal.pone.0235434
Abstrakt: The genetic diversity of North American soybean cultivars has been largely influenced by a small number of ancestors. High yielding breeding lines that possess exotic pedigrees have been developed, but identifying beneficial exotic alleles has been difficult as a result of complex interactions of yield alleles with genetic backgrounds and environments as well as the highly quantitative nature of yield. PI 416937 has been utilized in the development of many high yielding lines that have been entered into the USDA Southern States Uniform Tests over the past ~20 years. The primary goal of this research was to identify genomic regions under breeding selection from PI 416937 and introduce a methodology for identifying and potentially utilizing beneficial diversity from lines prevalent in the ancestry of elite cultivars. Utilizing SoySNP50K Infinium BeadChips, 52 high yielding PI 416937-derived lines as well as their parents were genotyped to identify PI 416937 alleles under breeding selection. Nine genomic regions across three chromosomes and 17 genomic regions across seven chromosomes were identified where PI 416937 alleles were under positive or negative selection. Minimal significant associations between PI 416937 alleles and yield were observed in replicated yield trials of five RIL populations, highlighting the difficulty of consistently detecting yield associations.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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