数字农科院2.0

Functional differentiation and genetic diversity of rice cation exchanger (CAX) genes and their potential use in rice improvement

文献类型： 外文期刊

作者： Shangshu Lian;Yanjun Chen;Yanyan Zhou;Ting Feng;Jingsi Chen;Lunping Liang;Yingzhi Qian;Tao Huang;Chenyang Zhang;Fengcai Wu;Wenli Zou;Zhikang Li;Lijun Meng;Min Li

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关键词： （1-2-2）

期刊名称： Scientific Reports

ISSN： 2045-2322

年卷期： 2024 年 14 卷 1 期

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收录情况： SCIE（2024版）

摘要： Cation exchanger (CAX) genes play an important role in plant growth/development and response to biotic and abiotic stresses. Here, we tried to obtain important information on the functionalities and phenotypic effects of CAX gene family by systematic analyses of their expression patterns, genetic diversity (gene CDS haplotypes, structural variations, gene presence/absence variations) in 3010 rice genomes and nine parents of 496 Huanghuazhan introgression lines, the frequency shifts of the predominant gcHaps at these loci to artificial selection during modern breeding, and their association with tolerances to several abiotic stresses. Significant amounts of variation also exist in the cis-regulatory elements (CREs) of the OsCAX gene promoters in 50 high-quality rice genomes. The functional differentiation of OsCAX gene family were reflected primarily by their tissue and development specific expression patterns and in varied responses to different treatments, by unique sets of CREs in their promoters and their associations with specific agronomic traits/abiotic stress tolerances. Our results indicated that OsCAX1a and OsCAX2 as general signal transporters were in many processes of rice growth/development and responses to diverse environments, but they might be of less value in rice improvement. OsCAX1b, OsCAX1c, OsCAX3 and OsCAX4 was expected to be of potential value in rice improvement because of their associations with specific traits, responsiveness to specific abiotic stresses or phytohormones, and relatively high gcHap and CRE diversity. Our strategy was demonstrated to be highly efficient to obtain important genetic information on genes/alleles of specific gene family and can be used to systematically characterize the other rice gene families.

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