文献类型： 外文期刊
作者： Song, Xudong 1 ; Zhou, Guangfei 1 ; Zhang, Zhenliang 1 ; Zhang, Huiming 1 ; Xue, Lin 1 ; Wang, Hui 3 ; Shi, Mingliang 1 ; Lu, Huhua 1 ; Mao, Yuxiang 1 ; Chen, Guoqing 1 ; Huang, Xiaolan 1 ; Zheng, Hongjian 3 ; Hao, Derong 1 ;
作者机构： 1.Jiangsu Yanjiang Inst Agr Sci, Nantong 226541, Peoples R China
2.Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing 210095, Peoples R China
3.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, CIMMYT China Specialty Maize Res Ctr, Shanghai 201106, Peoples R China
4.Shanghai Engn Res Ctr Specialty Maize, Shanghai 201106, Peoples R China
关键词： waxy maize; ear tip barrenness; genome-wide association study; favorable allele
期刊名称：BREEDING SCIENCE （ 影响因子：2.4； 五年影响因子：2.8 ）
ISSN： 1344-7610
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Ear tip-barrenness (ETB), which results from aborted kernels or infertile florets at the ear tip, is an undesirable factor affecting the yield and quality of waxy maize. To uncover the genetic basis of ETB, a genomewide association study (GWAS) was conducted using the genotype with 27,354 SNPs and phenotype with three environments. Five SNPs that distributed on chromosomes 1, 3 and 6, were identified to be significantly associated with ETB based on the threshold of false discovery rate (FDR) at 0.05. Among these significant loci, three SNPs were clustered together and colocalized with genomic regions previously reported. The average length of ETB decreased almost linearly from the inbred lines containing no favorable alleles across the three loci (1.75 cm) to those with one (1.18 cm), two (0.94 cm) and three (0.65 cm) favorable alleles. Moreover, three important genes, Zm00001d030028, Zm00001d041510 and Zm00001d038676 were predicted for three significant QTLs, respectively. These results promote the understanding genetic basis for ETB and will be useful for breeding waxy maize varieties with high-quality and high-yield.
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