Nei 6 You 7075, a hybrid rice cultivar, exhibits enhanced disease resistance and drought tolerance traits
文献类型： 外文期刊
作者： Cui, Lili 1 ; Song, Yu 1 ; Zhao, Yongchao 1 ; Gao, Rongrong 1 ; Wang, Yingheng 1 ; Lin, Qiang 1 ; Jiang, Jiahuan 1 ; Xie, Hongguang 1 ; Cai, Qiuhua 1 ; Zhu, Yongsheng 1 ; Xie, Huaan 1 ; Zhang, Jianfu 1 ;
作者机构： 1.Fujian Acad Agr Sci, Rice Res Inst, Fuzhou 350018, Peoples R China
2.Minist Agr & Affairs, Key Lab Germplasm Innovat & Mol Breeding Hybrid Ri, Fuzhou, Peoples R China
3.Incubator Natl Key Lab Germplasm Innovat & Mol Bre, Fuzhou, Peoples R China
4.Natl Rice Improvement Ctr China, Fuzhou Branch, Fuzhou, Peoples R China
5.Fujian Engn Lab Crop Mol Breeding, Fuzhou, Peoples R China
6.Fujian Key Lab Rice Mol Breeding, Fuzhou 350003, Peoples R China
关键词： Hybrid rice; Heterosis; Rice blast; Bacterial blight; Drought tolerance; Transcriptome
期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）
ISSN： 1471-2229
年卷期： 2024 年 24 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundRice is the main food crop for much of the population in China. Therefore, selecting and breeding new disease resistance and drought tolerance in rice is essential to ensure national food security. The utilization of heterosis has significantly enhanced rice productivity, yet many of the molecular mechanisms underlying this phenomenon remain largely unexplored. 'Nei 6 You 7075' ('N6Y7075') is a novel hybrid rice cultivar with exceptional quality, developed through the crossbreeding of 'Fuhui 7075' ('FH7075') and 'Neixiang 6 A' ('NX6A'). However, the precise mechanisms underlying the disease resistance and drought tolerance in 'N6Y7075' are poorly understood. In this study, we investigated the resistance of hybrid rice 'N6Y7075' to bacterial blight (Xanthomonas oryzae pv. oryzae), rice blast (Magnaporthe oryzae), and drought and identified differentially expressed genes between hybrid rice 'N6Y7075' and its parents through RNA-seq analysis.ResultsOur research found that the hybrid 'N6Y7075' and its female parent 'NX6A' were less susceptible to bacterial blight and rice blast than the male parent 'FH7075', while 'FH7075' showed better drought tolerance than 'NX6A'. The hybrid 'N6Y7075' exhibited heterosis. Clustering results revealed that the expression profiles of the F1 hybrid closely resembled those of its parental lines rather than exhibiting an intermediate profile between the two parental lines. The disease resistance of hybrid rice 'N6Y7075' may be attributed to the plant-pathogen interaction pathways involving Xa21, CDPK, and RPM1-mediated hypersensitive response and WRKY1-induced defense-related gene expression and programmed cell death. The MAPK signaling pathway PR1 could also be associated with plant defense responses. Hybrid rice 'N6Y7075' may enhance drought tolerance by regulating MAPKKK17 and WAK60 in the MAPK signaling pathway. These proteins affect ABA stress adaptation and stomatal development in plants, respectively.ConclusionsOur results provide a preliminary exploration of 'N6Y7075' disease resistance and drought tolerance and provide a relevant theoretical basis for its further study and use. This study provides insights into the molecular mechanisms of heterosis in hybrid rice and identifies potential associated genes.
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