PRIYANKA. S. PATEL, N. B. PATEL, R. A. GAMI*, K. G. KUGASHIYA AND P. R. PATEL
Department of Genetics and Plant Breeding, CPCA, S. D. Agricultural University, Sardarkrushinagar (Gujarat)
Sorghum Research Station, S. D. Agricultural University, Deesa-385 535 (Gujarat)
Department of Seed technology, S. D. Agricultural University, Sardarkrushinagar (Gujarat)
Pulses Research Station, S. D. Agricultural University, Sardarkrushinagar (Gujarat)
*(e-mail : ramangami@gmail.com)
(Received : 9 March 2021; Accepted : 31 March 2021)
SUMMARY
The present investigation was carried out to study gene action and combining ability in
sorghum [Sorghum bicolor (L.) Moench]. The experimental material consisted of six parents (including check GJ 43 and CSV 32F (forage)) and their 15 half-diallel crosses. The seeds of 15 F1 hybrids were produced during summer 2019 at Sorghum Research Station, S. D. Agricultural University, Deesa, by manual emasculation and crossing. The seeds of parental lines were maintained through selfing. The analysis of variance for combining ability results revealed that mean sum of squares due to general combining ability were found highly significant for all the traits except the number of leaves per plant. In comparison, the specific combining ability effects were found significant for all the traits. Parents’ gca effects explicated that the parents CSV 21F and UTFS 91 were perfect general combiner for both green fodder yield per plant and dry fodder yield per plant. The patent Malwan found perfect general combiner for plant height (cm), leaf: stem ratio and Brix value. The parent GFS 4 perfect general combiner for days to flowering, days to maturity and protein content. A perusal of data of sca effects implied that the cross combinations GFS 4 × UTFS 9, Malwan × GJ 43 and PSVGS 313 × UTFS 91 recorded the highest sca effects, which were also highest in per se performance which involved poor × good, poor × average, average × good parents combination, respectively.
Key words: L×T analysis, gene action, combining ability, green fodder and grain yield