Association Analysis of Three Diverse Rice ( Oryza sativa L.) Germplasm Collections for Loci Regulating Grain Quality Traits
Autor: | Aaron Jackson, Trevis D. Huggins, R. G. Fjellstrom, Jeremy D. Edwards, Ming-Hsuan Chen, Anna M. McClung |
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Rok vydání: | 2019 |
Předmět: |
0106 biological sciences
0301 basic medicine Germplasm Oryza sativa lcsh:QH426-470 food and beverages Plant Science lcsh:Plant culture Biology 01 natural sciences Genetic architecture lcsh:Genetics 03 medical and health sciences 030104 developmental biology Evolutionary biology Genetic marker Genetics Trait Grain quality Microsatellite lcsh:SB1-1110 Agronomy and Crop Science 010606 plant biology & botany Genetic association |
Zdroj: | The Plant Genome, Vol 12, Iss 1 (2019) |
ISSN: | 1940-3372 |
Popis: | Rice ( L.) end-use cooking quality is vital for producers and billions of consumers worldwide. Grain quality is a complex trait with interacting genetic and environmental factors. Deciphering the complex genetic architecture associated with grain quality provides essential information for improved breeding strategies to enhance desirable traits that are stable across variable climatic and environmental conditions. In this study, genome-wide association (GWA) analysis of three rice diversity panels, the USDA rice core subset (1364 accessions), the minicore (MC) (173 accessions after removing non-), and the high density rice array–MC (HDMC) (383 accessions), with simple sequence repeats, single nucleotide polymorphic markers, or both, revealed large- and small-effect loci associated with known genes and previously uncharacterized genomic regions. Clustering of the significant regions in the GWA results suggests that multiple grain quality traits are inherited together. The 11 novel candidate loci for grain quality traits and the seven candidates for grain chalk identified are involved in the starch biosynthesis pathway. This study highlights the intricate pleiotropic relationships that exist in complex genotype–phenotypic associations and gives a greater insight into effective breeding strategies for grain quality improvement. |
Databáze: | OpenAIRE |
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