华南农业大学学报2012，Vol.33Issue(4)：585-588,4.
水稻抽穗开花期耐热种质资源的筛选鉴定
Screening for Germplasm with Heat Tolerance at Flowering Stage in Oryza sativa
摘要
Abstract
To screen the germplasm with heat tolerance in rice, twenty eight varieties (lines) from 11 countries were selected for evaluation of heat tolerance in this study. The tested rice varieties (lines) at flowering stage were subjected to high temperature treatment in phytotron with temperatures equal to or higher than 35. 0 X, for 10 hours, and the daily average temperature had been 33. 5 T for 7 days. The results indicated that the heat tolerance of the tested varieties (lines) varied considerably. The percentage of spikelet fertility of the tested varieties ranged from 0. 6% to 58. 7% and their heat tolerance indexes ranged from 0. 01 to 0. 85 after high temperature treatment. The indica varieties, "Ganxiangnuo" and "N22" were the most heat-tolerant varieties which had the heat tolerance indexes of 0. 84 and 0. 85 , respectively. Twenty-four SSR and InDel markers that could specifically differentiate indica from japonica were used to analyze the differentiation of the tested materials. The degree of indica-type of the tested materials calculated by the ratio of the nurnber of markers that cohld generate indica-type band pattern to the total number of markers used was positively correlated with their heat tolerance index ( P < 0. 05 ) , suggesting that indica subspecies was more heat-tolerant than japonica subspecies and there would be more chances to identify heat-tolerant rice germplasm when screening is conducted in indica rice.关键词
耐热性/籼粳性/种质筛选/抽穗开花期/水稻Key words
heat tolerance/indica-japonka differentiation/germplasm screening/flowering stage/Oryza sativa分类
农业科技引用本文复制引用
杨梯丰,张少红,王晓飞,黄章慧,赵均良,张桂权,刘斌..水稻抽穗开花期耐热种质资源的筛选鉴定[J].华南农业大学学报,2012,33(4):585-588,4.基金项目
广东省科技计划重大专项(2009A020102003) （2009A020102003）
