Transcriptome Profiling Identifies Candidate Genes Contributing toMale and Female Gamete Development in Synthetic Brassica Allohexaploids

文献类型： 外文期刊

第一作者： Ji, Chengyan

作者： Ji, Chengyan;Tian, Zhaoran;Liu, Yue;Shi, Gongyao;Tian, Baoming;Chen, Weiwei;Xie, Zhengqing;Han, Xingzhou;Liang, Niannian;Wei, Fang;Ji, Chengyan;Liang, Niannian;Wei, Xiaochun

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关键词： transcriptome; Brassica; allohexaploid; polyploid; male and female gamete development; meiosis; anther; ovule

期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）

ISSN：

年卷期： 2022 年 11 卷 12 期

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收录情况： SCI

摘要： Polyploidy plays a crucial role in plant evolution and speciation. The development of male and female gametes is essential to the reproductive capacity of polyploids, but their gene expression pattern has not been fully explored in newly established polyploids. The present study aimed to reveal a detailed atlas of gene expression for gamete development in newly synthetic Brassica allohexaploids that are not naturally existing species. Comparative transcriptome profiling between developing anthers (staged from meiosis to mature pollen) and ovules (staged from meiosis to mature embryo sac) was performed using RNA-Seq analysis. A total of 8676, 9775 and 4553 upregulated differentially expressed genes (DEGs) were identified for the development of both gametes, for male-only, and for female-only gamete development, respectively, in the synthetic Brassica allohexaploids. By combining gene ontology (GO) biological process analysis and data from the published literature, we identified 37 candidate genes for DNA double-strand break formation, synapsis and the crossover of homologous recombination during male and female meiosis and 51 candidate genes for tapetum development, sporopollenin biosynthesis and pollen wall development in male gamete development. Furthermore, 23 candidate genes for mitotic progression, nuclear positioning and cell specification and development were enriched in female gamete development. This study lays a good foundation for revealing the molecular regulation of genes related to male and female gamete development in Brassica allohexaploids and provides more resourceful genetic information on the reproductive biology of Brassica polyploid breeding.

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