Genome-wide association study of ear tip barrenness in waxy maize

文献类型： 外文期刊

第一作者： Song, Xudong

作者： Song, Xudong;Zhou, Guangfei;Zhang, Zhenliang;Zhang, Huiming;Xue, Lin;Shi, Mingliang;Lu, Huhua;Mao, Yuxiang;Chen, Guoqing;Huang, Xiaolan;Hao, Derong;Xue, Lin;Chen, Guoqing;Wang, Hui;Zheng, Hongjian;Wang, Hui;Zheng, Hongjian

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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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