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  • 赵凌,赵春芳,王健,陈涛,赵庆勇,姚姝,王才林.20个水稻引进资源的花药开裂及苗期耐热性评价[J].植物遗传资源学报,2017,18(5):968-973.    [点击复制]
  • zhaoling,ZHAO Chun-fang,Jian Wang,Chen Tao,ZHAO Qing-yong,YAO Shu,WANG Cai-lin.Analyzing of Length Dehiscence at Basal Part of Thecae and Heat Resistance during Seedling Stage of 20 Introduced Rice Germplasms[J].植物遗传资源学报,2017,18(5):968-973.   [点击复制]
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20个水稻引进资源的花药开裂及苗期耐热性评价
赵凌,赵春芳,王健,陈涛,赵庆勇,姚姝,王才林
0
(江苏省农业科学院粮食作物研究所)
摘要:
对20个引进水稻资源进行了苗期耐热性鉴定和与开花期耐性紧密相关的花药开裂性状测定。鉴定结果表明,20个资源苗期高温处理后恢复7天的相对幼苗成活率从83.23到100%,恢复10天的相对幼苗成活率在68.18~100%之间。其中N22、AD-1140、IR9403-3-1-1和IR4427-51-6-3具有较强的苗期耐热性。引进资源的花药基部开裂长度从234.9到559.0 um,花药总长度1570.0~2351.7 um。20个资源的花药基部开裂长度和高温胁迫后恢复7天及10天的相对幼苗成活率之间都存在极显著正相关,花药长度和高温胁迫后恢复7天及10天的相对幼苗成活率没有相关性。花药基部开裂长度作为水稻耐热性的可能指标还需要进行进一步的深入研究。
关键词:  水稻  资源  苗期耐热性  花药基部开裂
DOI:10.13430/j.cnki.jpgr.2017.05.020
投稿时间:2016-12-05修订日期:2016-12-18
基金项目:国家自然科学基金项目;国家水稻产业技术体系
Analyzing of Length Dehiscence at Basal Part of Thecae and Heat Resistance during Seedling Stage of 20 Introduced Rice Germplasms
zhaoling,ZHAO Chun-fang,Jian Wang,Chen Tao,ZHAO Qing-yong,YAO Shu,WANG Cai-lin
(Institute of Food Crops, Jiangsu Academy of Agricultural Sciences)
Abstract:
Heat tolerance of 20 rice germplasms introduced from USDA were evaluated at seedling stage based on relative survival rate of seedling. The length of dehiscence at the basal part of thecae (BDL) which significant related with heat resistance on heading time and the length of anther (AL) were measured during flowering. After treated with heat and then recovered for 7 days, the relative survival rate of seedling of those germplasms was from 83.23 to 100%. When they recovered for 10 days after heat treatment, the relative survival rate of seedling was from 68.18 ~ 100%. N22, AD-1140, IR9403-3-1-1 and IR4427-51-6-3 showed high heat tolerance at seedling stage. BDL and AL of germplasms were ranged from 234.9 to 559.0 um and 1570.0 to 2351.7 um, respectively. Significant correlation between BDL and relative survival rate of seedling was found. The results indicated that the BDL also might be considered as the index of heat tolerance during seedling stage and deeply research is necessary in the future.
Key words:  Rice  Germplasm  Heat Resistance during Seedling Stage  Length Dehiscence at the Basal part of Thecae

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