Dissecting the genome-wide genetic variants of milling and appearance quality traits in rice
| Autor: | Nese Sreenivasulu, Andreas Graner, Lilia Molina, Gopal Misra, Saurabh Badoni, Matty Demont, Roslen Anacleto, Vito M. Butardo, Matthew K. Morell |
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| Rok vydání: | 2019 |
| Předmět: |
market survey
0106 biological sciences 0301 basic medicine head rice yield Physiology whole-genome resequencing Genome-wide association study Plant Science Biology Genome-wide association studies Polymorphism Single Nucleotide 01 natural sciences Genome multi-locus GWAS 03 medical and health sciences Genetic variation Plant breeding Allele Genetic association Genetics Haplotype food and beverages Chromosome Oryza Research Papers Phenotype 030104 developmental biology Crop Molecular Genetics Haplotypes grain chalkiness Edible Grain Genome-Wide Association Study 010606 plant biology & botany |
| Zdroj: | Journal of Experimental Botany |
| ISSN: | 1460-2431 0022-0957 |
| DOI: | 10.1093/jxb/erz256 |
| Popis: | Genetic regions in the rice genome are identified that affect the proportion of grains that remain intact after milling (the head rice yield) and the degree of chalkiness in the grain. Higher head rice yield (HRY), which represents the proportion of intact grains that survive milling, and lower grain chalkiness (opacity) are key quality traits. We investigated the genetic basis of HRY and chalkiness in 320 diverse resequenced accessions of indica rice with integrated single- and multi-locus genome-wide association studies using 2.26 million single-nucleotide polymorphisms. We identified novel haplotypes that underly higher HRY on chromosomes 3, 6, 8, and 11, and that lower grain chalkiness in a fine-mapped region on chromosome 5. Whole-genome sequencing of 92 IRRI breeding lines was performed to identify the genetic variants of HRY and chalkiness. Rare and novel haplotypes were found for lowering chalkiness, but missing alleles hindered progress towards enhancing HRY in breeding material. The novel haplotypes that we identified have potential use in breeding programs aimed at improving these important traits in the rice crop. |
| Databáze: | OpenAIRE |
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