1 research outputs found
The genetic basis of inheritance of plant height in maize
The aim of this study, on the grounds of direct and reciprocal diallel
crossing of five inbred lines of maize, was to determine: variability,
heterosis, combining ability and genetic basis of plant height inheritance.
The experiment was based on the principle of randomized block design in four
repetitions during two years. Analysis of variance of combining abilities
for plant height indicates the significance of general and specific
combining abilities. The GCA/SCA ratio shows that for the inheritance of
these traits non-additive genes are the most important. Variations between
direct and reciprocal crossing of this trait were highly significant in all
combinations except in combination of ZPL-11/6 x NS-1445, with the largest
effect of reciprocity established in combination of ZPL-11/6 x BL-47 in both
years. This indicates that regarding the inheritance of plant height, apart
from nuclear genes, plasma genes are involved as well. Eight out of ten
hybrid combinations had highly significant positive values of SCA. The high
value of SCA for this trait was noticed in the case of a hybrid combination
of F-7R and lines that were generally bad combiners (ZPL-11/6 and BL-47;
hybrid combinations where one parent was with high GCA and the other with
low GCA), which was probably due to interactions between parents’ genes