Genetic relationship between yield and yield components of maize

Abstract

One of the objectives of this paper was to determine relationship between grain yield and yield components, in S1 and HS progenies of one early synthetic maize population. Grain yield was in high significant, medium strong and strong association with all studied yield components, in both populations. The strongest correlation was recorded between grain yield and 1000-kernel weight (S1 progenies rg = 0.684**; HS progenies rg = 0.633**). Between other studied traits, the highest values of genotypic coefficient of correlations were found between 1000-kernel weight and kernel depth in S1 population, and 1000-kernel weight and ear length in HS population. Also, objective of this research was founding the direct and indirect effects of yield components on grain yield. Desirable, high significant influence on grain yield, in path coefficient analysis, was found for 1000-kernel weight and kernel row number, and in S1 and HS progenies, and for ear length in population of S1 progenies. Kernel depth has undesirable direct effect on grain yield, in both populations.

Jedan od ciljev ovog istraživanja je bio da se utvrdi međuzavisnost prinosa zrna i komponenti prinosa, kod S1 i HS potomstva jedne rane sintetičke populacije kukuruza. U obe proučavane populacije utvrđena je visoko značajna, srednje jaka i jaka međuzavisnost između prinosa zrna i svih proučavanih komponenti prinosa. Najjača korelativna veza ustanovljena je između prinosa i mase 1000 zrna (S1 potomstvo rg = 0.684**; HS potomstvo rg = 0.633**). Između ostalih proučavanih osobina, u populaciji S1 potomstava, najjača korelativna veza ustanovljena je između mase 1000 zrna i dubine zrna, dok je u drugoj proučavanoj populaciji najjača korelacija ustanovljena između mase 1000 zrna i dužine klipa. Takođe, cilj ovog rada je bio i utvrđivanje direktnog i indirektnog uticaja komponenti prinosa na prinos zrna. U path koeficijent analizi, visoko značajan i poželjan direktni uticaj na prinos zrna ustanovljen je za masu 1000 zrna i broj redova zrna na klipu, u obe proučavane populacije, i za dužinu klipa u populaciji S1 potomstva. Dubina zrna pokazala je nepoželjan uticaj na prinos zrna, i u populaciji S1 i HS potomstva.