中国农业科学（英文版）2002，Vol.1Issue(8)：831-836,6.
Regulation and Genetic Analysis of Leaf Source Capacity in Rice
Regulation and Genetic Analysis of Leaf Source Capacity in Rice
摘要
Abstract
The highest value of photosynthetic rate and active photosynthesis duration in flag leaves could be increased in a range of 3.55% and 3 d by dressing N (112.5 kg/ha) at heading stage in hybrid rice variety cv. Shanyou63 compared with control (no dressing N at heading), respectively. This resulted in the 7.93 percentage and 5.70 percentage 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 hB2 and hN2 in LSC for rice were higher than 70 percentage and 30 percentage,respectively, suggesting that it may be used as an index for selecting varieties with high photosynthetic efficiency 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
Leaf source capacity (LSC)/Regulation/Heritability/Combining ability/RiceKey words
Leaf source capacity (LSC)/Regulation/Heritability/Combining ability/Rice引用本文复制引用
CAO Shu-qing,ZHANG Rong-xian,LU Wei,CHEN Guo-xiang,DENG Zhi-rui,TANG Yun-lai,GONG Hong-bing,YANG Tu-nan..Regulation and Genetic Analysis of Leaf Source Capacity in Rice[J].中国农业科学（英文版）,2002,1(8):831-836,6.基金项目
This project was supported by the State Key Ba sic Research Development Plan (G1998010100) （G1998010100）
the "Kuayue" Plan of Ministry of Agriculture, P.R. China and the grant from The Key Lab of Biology Tech nology and Resource in Jiangsu Province. （）
