Genetic variation of characters associated with low nitrogen tolerance in tropical maize
The study used six tropical maize inbred lines from CTMMYT as parents of a 6×6 half diallel cross and evaluated under low and high levels of N application to determine the types,relative magnitudes of gene effects and heritability.Field experiments were conducted at University of Philippines during the 1997 wet and 1997-1998 dry seasons.Under low N condition,there were significant additive genetic differences in the base population for grain yield,number of rows per ear,100-kernel weight,ear length,number of ears per plant,number of green leaves below ear,anthesis-silking interval,ear leaf area,and shoot dry weight,and highly significant additive differences for plant height.The characters which have higher narrow sense heritability are plant height,ear length,ear leaf area,100-kernel weight,number of rows per ear,and number of green leaves under ear.The results suggested the possibility of solving N deficiency problem by breeding technology.
NETL
NSTL
万方数据
维普
