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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 1,227 - 1,238 (12page)
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Background The digestibility of starch is important for the nutritive value of staple food. Although several genes are responsible for resistant starch (RS) and slowly digestible starch (SDS), gaps persist concerning the molecular basis of RS and SDS formation due to the complex genetic mechanisms of starch digestibility. Objectives The objective of this study was to identify new genes for starch digestibility in rice and interprete the genetic mechanisms of RS and SDS by GWAS. Methods Genome-wide association studies were conducted by associating the RS and SDS phenotypes of 104 re-sequenced rice lines to an SNP dataset of 2,288,867 sites using a compressed mixed linear model. Candidate genes were identifed according to the position of the SNPs based on data from the MSU Rice Genome Annotation Project. Results Seven quantitative trait loci (QTLs) were detected to be associated with the RS content, among which the SNP 6 m1765761 was located on Waxy. Starch branching enzymes IIa (BEIIa) close to QTL qRS-I4 was detected and further identifed as a specifc candidate gene for RS in INDICA. Two QTLs were associated with SDS, and the LOC_Os09g09360 encoding lipase was identifed as a causal gene for SDS. Conclusions GWAS is a valid strategy to genetically dissect the formation of starch digestion properties in rice. RS formation in grains is dependent on the rice type; lipid might also contribute to starch digestibility and should be an alternative factor to improve rice starch digestibility.
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참고문헌 (40)
참고문헌 신청
Agrama HA / 2009 / Genetic assessment of a mini-core subset developed from the USDA rice genebank / Crop Sci 49:1336~1346
Anacleto R / 2019 / Integrating a genome-wide association study with a large-scale transcriptome analysis to predict genetic regions influencing the glycaemic index and texture in rice / Plant Biotechnol J 17:1261~1275
Bao JS / 2017 / Genome-wide association study of the resistant starch content in rice grains / Stärch-Stärke 69(7-8):1600343
Biselli C / 2019 / GWAS for starch-related parameters in Japonica Rice (Oryza sativa L.) / Plants 8:292
Benmoussa M / 2017 / Rice amylopectin fine structure variability affects starch digestion properties / J Agric Food Chem 55:1475~1479
Anacleto R / 2019 / Integrating a genome-wide association study with a large-scale transcriptome analysis to predict genetic regions influencing the glycaemic index and texture in rice / Plant Biotechnol J 17:1261~1275
Bao JS / 2017 / Genome-wide association study of the resistant starch content in rice grains / Stärch-Stärke 69(7-8):1600343
Biselli C / 2019 / GWAS for starch-related parameters in Japonica Rice (Oryza sativa L.) / Plants 8:292
Benmoussa M / 2017 / Rice amylopectin fine structure variability affects starch digestion properties / J Agric Food Chem 55:1475~1479
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