Screening germplasm and detecting QTLs for mesocotyl elongation trait in rice (Oryza sativa L.) by association mapping
文献类型： 外文期刊
作者： Edzesi, Wisdom Mawuli 1 ; Dang, Xiaojing 1 ; Liu, Erbao 1 ; Bandoh, William Kwame Nuako 2 ; Gakpetor, Patience Mansa 2 ; Ofori, Daniel Aninagyei 2 ; Hong, Delin 1 ;
作者机构： 1.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China
2.KNUST, Forestry Res Inst Ghana, Council Sci & Ind Res, POB UP 63,Fumesua, Kumasi, Ashanti, Ghana
3.Anhui Acad Agr Sci, Inst Rice Res, Hefei 230031, Peoples R China
4.Anhui Agr Univ, Coll Agr, Hefei 230036, Peoples R China
关键词： Dry direct seeding rice; Mesocotyl elongation length; Association mapping; Favorable marker allele; Simple sequence repeat
期刊名称：BMC GENOMIC DATA （ 影响因子：1.9； 五年影响因子：1.9 ）
ISSN：
年卷期： 2023 年 24 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundRice is one of the most important food crops in the world and mainly cultivated in paddy field by transplanting seedlings. However, increasing water scarcity due to climate change, labor cost for transplanting, and competition from urbanization is making this traditional method of rice production unsustainable in the long term. In the present study, we mined favorable alleles for mesocotyl elongation length (MEL) by combining the phenotypic data of 543 rice accessions with genotypic data of 262 SSR markers through association mapping method.ResultsAmong the 543 rice accessions studied, we found 130 accessions could elongate mesocotyl length under dark germination condition. A marker-trait association analysis based on a mixed linear model revealed eleven SSR markers were associated with MEL trait with p-value less than 0.01. Among the 11 association loci, seven were novel. In total, 30 favorable marker alleles for MEL were mined, and RM265-140 bp showed the highest phenotypic effect value of 1.8 cm with Yuedao46 as the carrier accession. The long MEL group of rice accessions had higher seedling emergence rate than the short MEL group in the field. The correlation coefficient (r(GCC-FSC) = 0.485**) between growth chamber condition (GCC) and field soil condition (FSC) showed positive relationship and highly significant (P < 0.01) indicating that the result obtained in GCC could basically represent that obtained under FSC.ConclusionNot every genotype of the rice possesses the ability to elongate its mesocotyl length under dark or deep sowing condition. Mesocotyl elongation length is a quantitative trait controlled by many gene loci, and can be improved by pyramiding favorable alleles dispersed at different loci in different germplasm into a single genotype.
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