Genetic and phenotypic relationship between grain yield and components of grain yield of maize (Zea mays L.)

Abstract

For efficient selection of grain yield, like the most importance economic trait, in regard to its on the great influence the environmental factors, has complex mode of inheritance and low heritability, is necessary to know genotypic and phenotypic coefficient of correlations between grain yield and morphological traits of the plant and ear which are influencing on the grain yield. The objective of this paper was to determine relationship between grain yield and morphological traits, in 8 inbred lines and their hybrids. Strong genetic and phenotypic correlations were found between grain yield and other studied traits, except between grain yield, on one side, and kernel row number where we found medium correlations. Between other studied traits, the highest values of genotypic and phenotypic coefficient of correlations were found between ear length and cob weight.

Za efikasnu selekciju prinosa zrna, kao najvažnije ekonomske osobine, s obzirom na to da je pod jakim uticajem faktora spoljašnje sredine, ima veoma kompleksno nasleđivanje i uglavnom nisku heritabilnost, neophodno je poznavati genotipske i fenotipske korelacije prinosa i ostalih osobina biljke koje utiču na formiranje prinosa. Cilj ovog istraživanja je bio da se utvrde korelativni odnosi koji vladaju između prinosa zrna i morfoloških osobina biljke i klipa, kod 8 inbred linija i 15 hibrida, dobijenih njihovim međusobnim ukrštanjem. Jaki genetički i fenotipski korelacioni koeficijenti ustanovljeni su između prinosa zrna i svih ostalih proučavanih osobina, izuzev između prinosa i broja redova zrna na klipu, gde je ustanovljena srednje jaka korelacija. Između ostalih proučavanih osobina, najveća vrednost, i genotipskog, i fenotiopskog korelacionog koeficijenta, ustanovljena je između dužine klipa i mase oklaska.