Abstract：
The leafing rate of fourteen cultivars were estimated based on the interval sowing experiments and the rapid leafing genotype at the vegetative growth stage in an indica cultivar Yanhui 559 was discovered.The leaf number of the main culm in Yanhui 559 was 4-5 more than that in Lemont,moreover the leafing rate of Yanhui 559 was significantly higher than that of Lemont on the basis of almost the same growth duration from sowing to heading.Furthermore,it showed difference in the leafing rate at the vegetative growth stage,but not at the panicle initiation stage.According to the analysis on the leafing rate of the parents(Yanhui 559,Lemont),two backcross populations and F2 plants,it was suggested that several quantitative trait genes possibly including main effect members regulated the rapid leafing character.The investigation on the traits of parents and partial populations showed that the rapid leafing genotypes exhibited more tillers per plant,higher initial tillering rate and maximum tiller number per plant,and its yield components including number of panicles per plant and number of grains per panicle were superior to the slow leafing types.The necessity of further research on the genotype and its prospects in rice breeding were discussed.
PAN Cun-hong ,CHEN Zong-xiang ,MAO Hai-yan et al. Discovery of a Rapid Leafing Genotype at Vegetative Growth Stage in Rice and Its Preliminary Analysis [J]. , 2007, 21(3): 259-264 .
2007, Vol. 21 
