A genomic perspective on the important genetic mechanisms of upland adaptation of rice

BMC Plant Biology

Research Article

Weiming He¹  Jun Lyu²  Wen Wang²  Zhiheng Gou²  Xin Li³  Shilai Zhang⁴  Wangqi Huang⁴  Jing Zhang⁴  Fengyi Hu⁴  Dayun Tao⁴  Baoye Li⁴  Liyun Meng⁵ 

[1] BGI-Shenzhen, 518083, Shenzhen, China;CAS-Max Planck Junior Research Group, State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, 650223, Kunming, China;Center for Epigenetics, Johns Hopkins University School of Medicine Baltimore, 21205, Baltimore, MD, USA;Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, 650205, Kunming, China;Inner Mongolia Agricultural University, 010018, Hohhot, China;

关键词: Upland rice;    Upland adaptation;    Genetic mechanisms;    Phylogenetics;    Population structure;    Artificial selection;   

DOI  :  10.1186/1471-2229-14-160

 received in 2014-02-12, accepted in 2014-06-06,  发布年份 2014

来源: Springer

【 摘 要 】

BackgroundCultivated rice consists of two important ecotypes, upland and irrigated, that have respectively adapted to either dry land or irrigated cultivation. Upland rice, widely adopted in rainfed upland areas in virtue of its little water requirement, contains abundant untapped genetic resources, such as genes for drought adaptation. With water shortage exacerbated and population expanding, the need for breeding crop varieties with drought adaptation becomes more and more urgent. However, a previous oversight in upland rice research reveals little information regarding its genetic mechanisms for upland adaption, greatly hindering progress in harnessing its genetic resources for breeding and cultivation.ResultsIn this study, we selected 84 upland and 82 irrigated accessions from all over the world, phenotyped them under both irrigated and dry land environments, and investigated the phylogenetic relations and population structure of the upland ecotype using whole genome variation data. Further comparative analysis yields a list of differentiated genes that may account for the phenotypic and physiological differences between upland and irrigated rice.ConclusionsThis study represents the first genomic investigation in a large sample of upland rice, providing valuable gene list for understanding upland rice adaptation, especially drought-related adaptation, and its subsequent utilization in modern agriculture.

【 授权许可】

CC BY   
© Lyu et al.; licensee BioMed Central Ltd. 2014