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Dissecting the genetic basis of maize deep-sowing tolerance by combining association mapping and gene expression analysis

引用

Journal of Integrative Agriculture 2022年第5期21卷 1266-1277页

作者： YANG Yue MA Yu-ting LIU Yang-yang Demar LYLE LI Dong-dong WANG Ping-xi XU Jia-liang ZHEN Si-han LU Jia-wen PENG Yun-ling CUI Yu FU Jun-jie DU Wan-li ZHANG Hong-wei WANG Jian-hua Agronomy College Shenyang Agricultural UniversityShenyang 110161P.R.China National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Center for Seed Science and Technology College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193P.R.China Gansu Provincial Key Laboratory for Aridland Crop Science/Agronomy College Gansu Agricultural UniversityLanzhou 730070P.R.China

Deep-sowing is an important method for avoiding drought stress in crop species,including *** candidate genes is the groundwork for investigating the molecular mechanism underlying maize deep-sowing *** study evaluated four traits(mesocotyl length at 10 and 20 cm planting depths and seedling emergence rate on days 6 and 12)related to deep-sowing tolerance using a large maize population containing 386 inbred lines genotyped with 0.5 million high-quality single nucleotide polymorphisms(SNPs).The genomewide association study detected that 273 SNPs were in linkage disequilibrium(LD)with the genetic basis of maize deep-sowing *** RNA-sequencing analysis identified 1944 and 2098 differentially expressed genes(DEGs)in two comparisons,which shared 281 *** comparing the genomic locations of the 273 SNPs with those of the 281 DEGs,we identified seven candidate genes,of which GRMZM2G119769 encoded a sucrose non-fermenting 1 kinase interactor-like ***2G119769 was selected as the candidate gene because its homologs in other plants were related to organ length,auxin,or light *** gene association mapping revealed that natural variations in GRMZM2G119769 were related to phenotypic variations in maize mesocotyl *** expression of GRMZM2G119769 was higher in deep-sowing tolerant inbred *** results suggest that GRMZM2G119769 is the most likely candidate *** study provides information on the deep-sowing tolerance of maize germplasms and identifies candidate genes,which would be useful for further research on maize deep-sowing tolerance.

关键词： maize mesocotyl length association mapping differentially expressed gene SNF1 kinase interactor-like protein

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