水稻叶源量的调节与遗传分析  

Regulation and Genetic Analysis of Leaf Source Capacity in Rice

作　　者：曹树青[1] 陆巍[1] 张荣铣[1] 陈国祥[2] 邓志瑞[1] 唐运来[1] 龚红兵 杨图南 

机构地区：[1]南京农业大学水稻研究所,南京210095 [2]南京师范大学,南京210097 [3]江苏省镇江市农业科学研究所,句容212400

出　　处：《中国农业科学》2002年第8期901-905,共5页Scientia Agricultura Sinica

基　　金：国家重点基础研究发展规划项目 (G19980 10 10 0 ) ;农业跨越计划项目 ;资源生物技术江苏省重点实验室项目

摘　　要：以杂交水稻汕优 6 3为材料 ,于抽穗时增施氮肥 (112 .5kg/ha) ,可使光合速率最高值比对照提高 3.5 5 %,光合功能期延长约 3d ,叶源量和产量分别增加 7.93%和 5 .70 %。采用 4× 4NCII设计对水稻叶源量进行遗传分析 ,结果表明 ,叶源量的狭义遗传力和广义遗传力分别达到 70 %和 30 %以上 ,说明叶源量可作为育种指标。基因的加性效应和非加性效应对杂种一代叶源量形成的影响同等重要 ,叶源量受父母本互作效应影响较大。利用亲本一般配合力效应之和可以预测杂交稻叶源量的表现。The highest value of photosynthetic rate and active photosynthesis duration in flag leaves could be increased in a range of 3.55% and 3 days respectively, by dressing N(112.5 kg/ha) at heading stage in hybrid rice variety cv. Shanyou63 compared with the control (no dressing N at heading). This resulted in the 7.93% and 5.70% increases of its leaf source capacity (LSC) and yield, respectively. Furthermore, genetic analysis of LSC was made by 4 ×4 incomplete diallel cross design with 4 sterility lines and 4 resilience lines. The results showed that h B 2 and h N 2 in LSC for rice were higher than 70% and 30%, respectively, suggesting that it may be used as the index of selecting high photosynthetic efficiency varieties in rice breeding. There were the similar effects of the additive and non-additive variations on LSC in hybrid rice. LSC was mainly influenced by sterility line and resilience interactions. The adding effect value of general combining ability for its parents may be used to forecast the phenotype of LSC in hybrid rice.

关 键 词：水稻 叶源量 调节 遗传分析 遗传力 配合力 

分 类 号：S511[农业科学—作物学]