摘要
抽穗期决定着水稻品种的地区和季节适应性,我国水稻品种抽穗期表现出丰富的多样性。设置长、短日照和高、低温4种环境,分析了来自我国各稻区的83份粳稻和51份籼稻共134份水稻主栽品种的抽穗期感光性、感温性及基本营养生长性。回归分析表明我国水稻主栽品种的抽穗期与其感光性、基本营养生长性呈显著线性相关。高纬度地区的水稻品种往往具有弱的感光性和基本营养生长性,低纬度地区的品种感光性和基本营养生长性较强。利用一套抽穗期近等基因系对这134份品种抽穗期基因型进行了分析。结果表明,感光基因E1与基本营养生长Ef-1位点的不同基因型对我国水稻主栽品种抽穗期多样性起着重要的作用。大多数带有非感光等位基因e1的品种感光性与基本营养生长性都相对较弱,抽穗期较短;而携带感光性等位基因E1或E1t的品种的感光性与基本营养生长性都相对较强,抽穗期较长。在Ef-1位点,携带显性早熟等位基因Ef-1的品种,其基本营养生长性较弱,抽穗期较短;而携带早熟效应较弱的等位基因Ef-1t或迟熟等位基因ef-1的品种,其基本营养生长性较强,抽穗期较长。同时,各主基因的不同基因型在我国各稻区或各种类型水稻中的分布频率也表现出不同的特点。这些结果将对我国水稻种质的合理利用及广适应性水稻新品种的选育具有重要的指导意义。
Heading date（HD） determines the adaptability to growing regions of cultivated rice.There is a rich diversity of HDs in Chinese cultivated rice.In this study,HDs of 83 typical japonica rice and 51 typical indica rice cultivars native to different re-gions in China were investigated and their basic vegetative growth（BVG）,photoperiod-sensitivities（PS） and tempera-ture-sensitivities（TS） were analyzed.A regression analysis showed that HD was closely correlated with PS and BVG.The PS and BVG of cultivars were weak in high latitude regions of China,and strong in low latitude regions.Genetic analyses of the 134 cultivars were conducted using a set of HD tester lines.The results showed that,on the whole,when the cultivars carried no-PS allele e1,the plants headed earlier with weaker PS and BVG,when the cultivars carried the PS allele E1 or E1t,the plants headed later with strong PS and BVG.When the cultivars carried the allele Ef-1,the plants headed earlier with weaker BVG,when the cultivars carried the allele Ef-1t or ef-1,the plants headed later with strong BVG.It suggested that E1 and Ef-1 are two major de-terminants of variation in heading date of cultivated rice in China.Otherwise,the distribution of different alleles of the major heading date genes in different regions of China was analysed,and the results showed that the leading alleles of the major HD genes in different regions of China was different.
出处
《作物学报》
CAS
CSCD
北大核心
2012年第1期10-22,共13页
Acta Agronomica Sinica
基金
国家高技术研究发展计划(863计划)项目(2006AA100101,2006AA10Z1A5,2006BAD13B01,2009AA101101)
国家自然科学基金项目(30871497,30571142)
江苏省高技术招标项目(BG2006301)
高等学校学科创新引智计划项目(B08025)资助
关键词
抽穗期
多样性
感光性
感温性
基本营养生长性
基因型分析
Heading date
Diversity
Cultivated rice
Basic vegetative growth
Photoperiod-sensitivities
