Determination of Combining Ability of Inbred Corn Lines in terms of Grain Yield and Some Other Characteristics by Topcrossing Method
Aydin, N.; Gokmen, S.; Yildirim, A.
Journal of Agricultural Sciences-Tarim Bilimleri Dergisi 13(2): 120-127
Determination of yield potential and combining ability of inbred lines is one of the most important steps in hybrid corn breeding. The objective of this study was to determine the yield potential and the agronomic characters of homozygote dent inbred lines. Thirty lines were topcrossed with the public U.S. inbred line FrMo17 in 2000. F-1 hybrids were evaluated in the different yield trials at two locations, Samsun and Tokat, in 2001. Data on combining ability of time to tassel, plant height, ear lenght, number of kernel per ear, 1000-kernel weight and grain yield were investigated. Significant combining ability differences were observed among inbred lines for all traits in both locations. Inbred lines no 15, 16 and 18 had high combining ability in both locations. The highest yielding lines also showed significant positive combining ability effects for plant height, ear lenght and kernel weight. Combining ability was an important selection parameter for these materials.