文献类型： 外文期刊

作者： Wang, Rongsheng ¹ ; Li, Kun ¹ ; Zhang, Wei ¹ ; Liu, Hui ¹ ; Tao, Yongqing ¹ ; Liu, Yuming ¹ ; Ding, Guohua ⁴ ; Yang, Guang ⁴ ; Zhou, Yuanhang ¹ ; Wang, Jiayou ¹ ; Wu, Licheng ¹ ; Liu, Baohai ¹ ; Mu, Fengchen ¹ ;

作者机构： 1.Heilongjiang Acad Agr Sci, Biotechnol Res Inst, Harbin, Heilongjiang, Peoples R China

2.Heilongjiang Lab Crop & Livestock Mol Breeding, Key Lab Crop & Livestock Mol Breeding Heilongjian, Harbin, Heilongjiang, Peoples R China

3.Heilongjiang Engn & Technol Res Ctr Rice Mol Breed, Harbin, Heilongjiang, Peoples R China

4.Heilongjiang Acad Agr Sci, Harbin, Heilongjiang, Peoples R China

关键词： rice; days to heading; plant height; QTL-seq; bulked segregant analysis

期刊名称：FRONTIERS IN GENETICS （ 影响因子：3.7； 五年影响因子：4.3 ）

ISSN：

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： Introduction: Rice (Oryza sativa L.) is one of the most extensive crops in the world. China's Heilongjiang Province is the northernmost rice-growing region in the world. However, rice cultivars suitable for growth in low-latitude regions may not mature normally due to their distinct climate and short frost-free period. It is necessary to precisely determine the frost-free period for each region to make the best use of the rice growth stage so as to ensure the maturity and yield of different rice cultivars in Heilongjiang Province. The time span of the heading stage is a key parameter for evaluating the adaptability of a rice cultivar to a specific rice-growing region. Given the above facts, it is of high importance to study the associated genes and sites controlling days to heading (DH) and plant height (PH) of rice in Heilongjiang Province. Bulked segregant analysis (BSA) combined with high-throughput sequencing can effectively exclude interferences from background genomic differences, making it suitable for analyzing the associated sites of complex agronomic traits in early generations.Methods: In this study, an F3 segregating population was obtained by crossing two main cultivars that are grown under different temperatures and day-light conditions in Heilongjiang. Two pools of extreme phenotypes were built for the DH and PH of the population. For SNP and InDel variants obtained from whole-genome resequencing in the pools, an association analysis was performed using the Euclidean distance (ED) algorithm and the SNP/InDel index algorithm.Results: The intersection of SNP and InDel regions associated with the phenotypes was considered to obtain the final associated sites. After excluding interferences from the cloned genes on chromosomes 2 and 7, a total length of 6.34 Mb on chromosomes 1, 3, and 10 and 3.16 Mb on chromosomes 1 and 10 were left associated with PH and DH, respectively. Then, we performed a gene annotation analysis for candidate genes in the remaining regions using multiple genome annotation databases. Our research provides basic data for subsequent gene mapping and cloning.Discussion: By mining more genetic loci associated with the days to heading and plant height of rice, we may provide abundant genetic resources for refined molecular breeding in Heilongjiang Province.