水稻盐胁迫下农艺和生理性状的遗传分析(简报)

GENETIC ANALYSIS OF AGRONOMIC AND PHYSIOLOGICAL TRAITS IN RICE UNDER SALT STRESS

土壤盐渍化是一个世界性的资源问题和生态问题,是限制水稻生长发育、基因表达和产量的一个重要因子。过去的二十多年,作物生理学者以比较生理学的方法研究了盐害胁迫下水稻的形态特征和生理生化变化,确定和建立一些可用于鉴别水稻抗盐性筛选的指标体系,以期找到某一个与产量能直接相关的生理生化性状或形态学性状,用于水稻的育种。随着基因组学研究的发展，特别是模式植物基因组计划和有关代谢工程方面的研究进展，

By employing a recombination inbreed line （RIL） population of 247 lines derived from an inidca-inidca cross Zhenshan 97Bx Milyang 46, a linkage map consisting of 250 DNA markers was used for QTL mapping of plant height, maximum root length, root dry weight and relative water content under normal and salt stress （0.7% NaCl）. Six QTLs for these traits were identiffed under salt stress, with 6.01%-16.50% phenotypic variations. Six QTLs for these traits were identified under normal conditions, with 4.39%-18.50% phenotypic variations. Meanwhile, root length and relative water content were simultaneously affected by two QTLs located in the interval RM246-RG101 on chromosome 1 and the interval RZ399-RG393 on chromosome 3.