1Department of Genetics and Plant Breeding, College of Agriculture, Rajendranagar
2Department of Genetics and Plant Breeding, Regional Agricultural Research Station, Palem
3Department of Genetics and Plant Breeding, Agricultural Research Station, Tandur
4Department of Entomology, Regional Agricultural Research Station, Palem
5Department of Molecular Biology and Biotechnology, Rajendranagar
*E-Mail: venkatachanda1968@gmail.com
Online Published on 02 February, 2022.
Forty eight hybrids, utilizing six male sterile lines and eight restorers of Sorghum (Sorghum bicolor (L.) Moench) were evaluated for general and specifc combining ability, variance components and standard heterosis. Among the lines ICSA 427 and ICSA 433 and testers ICSR 13009 and ICSR 13031 were found to be good general combiners for grain yield per plot and other yield contributing traits. The estimates of 2gca and 2sca suggested a non-additive genetic variance for all the traits studied. Most of the cross combinations showed higher magnitude of specifc combining ability effects volving high × high (H × H) and high × low (H × L) combining ability effects of lines and testers for grain yield per plot and other yield contributing traits. The estimates of standard heterosis for grain yield per plot ranged from-49.53 and-50.46 (ICSA 435 × ICSR 13004) to 41.96 and 39.35 (ICSA 433 × ICSR 13043) over CSV-41 and CSH-16, respectively. Out of 48 cross combinations, six registered highly signifcant positive heterosis (over CSV-41 and CSH-16) for grain yield per plot.
Sorghum, Male sterility, Heterosis, Combining ability.
