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Identification of Candidate Genes Involved in Curd Riceyness in Cauliflower

文献类型： 外文期刊

作者： Zhao, Zhenqing 1 ; Sheng, Xiaoguang 1 ; Yu, Huifang 1 ; Wang, Jiansheng 1 ; Shen, Yusen 1 ; Gu, Honghui 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Vegetables, Shiqiao Rd 198, Hangzhou 310021, Peoples R China

关键词： cauliflower; curd development; riceyness; genetic mapping; flowering regulation

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN：

年卷期： 2020 年 21 卷 6 期

页码：

收录情况： SCI

摘要： "Riceyness" refers to the precocious development of flower bud initials over the curd surface of cauliflower, and it is regarded as undesirable for the market. The present study aimed to identify the candidate loci and genes responsible for the morphological difference in riceyness between a pair of cauliflower sister lines. Genetic analysis revealed that riceyness is controlled by a single dominant locus. An F-2 population derived from the cross between these sister lines was used to construct "riceyness" and "non-riceyness" bulks, and then it was subjected to BSA-seq. On the basis of the results of Delta(SNP-index) analysis, a 4.0 Mb candidate region including 22 putative SNPs was mapped on chromosome C04. Combining the RNA-seq, gene function annotation, and target sequence analysis among two parents and other breeding lines, an orthologous gene of the Arabidopsis gene SOC1, Bo4g024850 was presumed as the candidate gene, and an upstream SNP likely resulted in riceyness phenotype via influencing the expression levels of Bo4g024850. These results are helpful to understand the genetic mechanism regulating riceyness, and to facilitate the molecular improvement on cauliflower curds.

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