摘要
对419份广西水稻地方品种初级核心种质进行芽期、苗期的耐冷性鉴定及相关分析,结果表明:广西水稻地方品种芽期、苗期耐冷性主要集中在7级和9级,总体耐冷性较弱。芽期、苗期极强耐冷种质(1级)分别为24份和27份,占参试总数的5.73%和6.44%,其中10份种质芽期和苗期均表现极强耐冷(1级)。芽期、苗期耐冷性呈极显著正相关(r=0.66)。粳稻芽期、苗期耐冷性均显著高于籼稻;粘糯稻之间耐冷性差异是由籼粳稻类型的耐冷差异引起的;来自高寒山区稻作区的品种芽期和苗期平均耐冷表现最强。利用34个SSR标记与芽期、苗期耐冷性进行Pearson相关分析,在第7和第9染色体上,各鉴定出1个同时与芽期和苗期耐冷性相关联的位点。本研究为水稻芽期、苗期耐冷育种提供新的抗源材料,并为水稻耐冷基因定位及机理研究奠定基础。
Cold tolerance of 419 accessions of primary rice core collection from Guangxi was evaluated at geminating and seedling stages. The results indicated that the cold tolerance at geminating and seedling stages mainly concentrated in grade 7 and 9,most of the accessions were sensitive to cold. 24 and 27 accessions were classed into the high-level tolerance（Grade 1） at germinating and seeding stages,accounting for 5. 73% and 6. 44% of the total accessions,respectively. There was highly positive correlation（r = 0. 66） between the cold tolerance scores at two stages. There were significant differences of cold tolerance between Indica and Japonica. Cold tolerance of Japonica was significantly higher than Indica at geminating and seedling stages. Cold tolerance difference between Glutinous and Noglutinous rice was caused by differences cold tolerance of Indica and Japonica. The rice collected from alpine areas showed much higher cold tolerance than Southern and North Guangxi rice regions,no difference with central Guangxi rice regions. Pearson correlation analysis was carried on using 34 SSR markers. Two loci,on the 7 th and 9th chromosome,respectively,were identified to have a correlation with cold tolerance at both geminating and seedling stages. This study will provide elite rice germplasm of cold tolerance and a basis for mapping and cloning cold tolerance in rice.
作者
夏秀忠
张宗琼
杨行海
农保选
曾宇
刘开强
邓国富
李丹婷
XIA Xiu-zhong ZHANG Zong-qiong YANG Xing-hai NONG Bao-xuan ZENG Yu LIU Kai-qiang DENG Guo-fu LI Dan-tingl(Rice Research Institute, Guangxi Academy of Agricultural Sciences/Guangxi Key Laboratory of Rice Genetics and Breeding, Nanning 530007 Guaagxi Academy of Agricultural Sciences, Nanning 530007)
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2016年第6期969-975,共7页
Journal of Plant Genetic Resources
基金
广西“八桂学者”专项经费项目
广西农科院优势团队项目(2015Y T15)
广西农科院科技发展基金(桂农科2014J Q13)
广西科学研究与技术开发计划项目(桂科重14121001-1-6)
广西自然科学基金项目(2015G XNSFBA139054,2015G XNSFBA139080)
关键词
广西
水稻
地方品种
耐冷性
相关分析
Guangxi
rice
landrace
cold tolerance
correlation analysis
