Articles

Triallel analysis for grain yield and its components over pooled environments in maize ( Zea mays L.)


Abstract


Seven parents were utilized in crossing programme to produce 21 single crosses and 105 three-way crosses to
study gene actions for grain yield and yield contributing characters. Triallel analysis was conducted for important
yield components i.e.,ear length, ear diameter, number of kernel rows ear-1, number of kernels row-1, 100-grain
weight, shelling percentage and grain yield. Significance of 1-line general line effects of both first and second
kind, 2- line specific effects of first kind and second kind as well as 3-line specific effects for all the yield and yield
contributing traits except number of kernels row-1 in case of 3-line specific effects suggested the major role of all
three types of epistatic components viz., additive × additive, additive × dominance, dominance × dominance,
in addition to the additive and dominance gene actions in the expression of these traits. For grain yield, BML-51
was a good general combiner both as grandparent and immediate parent while BML-32 and BML-14 were good
general combiners as immediate parent. (BML-51 × BML-6) and (BML-32 × BML-13) had desirable 2-line effects
of first and second kind. Crosses viz., (BML-14 × BML-6) × BML-51, (BML-32 × BML-6) × BML-51and (BML-51 ×
BML-10) × BML-6 were the best performing triplets with desirable 1-line general and 2-line specific effects. Parent
order effects i.e. the order of lines utilized in three-way crosses were clearly elucidated, the order of in which
crosses will be effected for obtaining superior hybrids with high grain yield.

Keywords

Maize, Triallel, parent order effects, grain yield






Maydica - A journal devoted to maize and allied species

ISSN: 2279-8013