GENETIC AND PHENOTYPIC VARIABILITY OF YIELD COMPONENTS IN AN F3 MAIZE POPULATION PUBLISHEDSlaviša Stojković, Nebojša Deletić, Vladan Djurić, Milan Biberdžić
This paper deals with the investigation of F 3 population 2002-30, created in the Department of Maize, Institute of Field and Vegetable Crops, Novi Sad. During the first year (2004), about 150 plants of the studied population were selfed and simultaneously crossed with the tester 1491x1496, in order to get complementary S 1 and HS progenies. After the harvest, 41 progenies of each type were selected for the trials, by the random sample method. During the second and third year (2005 and 2006), the trials were carried out in Aleksinac, Leskovac, and Kruševac, as three studied environments, in RCB design. HS progenies had higher average values of the studied traits regarding S 1 progenies. The differences between progeny types were highly significant for all the studied traits, except for root and stalk lodged plants percent. Genetic variance of S 1 and HS progenies was significant for the all traits, except for root and stalk lodged plants percent and number of grain rows per ear. Genetic variances were higher in S 1 progenies, with the exception of root and stalk lodged plants percent and grain number per row. Hartley tests used to compare genetic variances between different progenies showed that the difference between progeny types in genetic variances was highly significant for grain yield, plant and ear height, ear length, number of grains per row, and 1000 grain mass, whereas it was not significant for root and stalk lodged plants percent, and number of grain rows per ear. Phenotypic variance was also significant for the all traits, except for root and stalk lodged plants percent and number of grain rows per ear in both progeny types. According to Hartley tests, difference between progenies in phenotypic variance was significant for grain yield and highly significant for plant and ear height, ear length, number of grains per row, and 1000 grain mass. The obtained values of broad-sense heritability were significantly higher in S 1 than in HS progenies. Low heritability values were calculated only for root and stalk lodged plants percent.
maize; grain yield; genetic variance; heritability