Estimates of Combining Ability in Spring-Summer Sorghum [Sorghum bicolor (L.) Moench] for Yield and some Morphological Traits Using Line X Tester Analysis

In kharif-2022 at crop research centre-1 of ITM University, Gwalior situated in gird agroclimatic zone of Madhya Pradesh, (India). eight sorghum genotypes were crossed following line x tester mating design giving rise to 15 hybrids which were cultivated during spring-summer season 2023 at same place to estimate the combining ability. Hybrids were evaluated for yield and its allied characters namely Days to 50% flowering, Days to maturity, Plant height (cm), Number of leaves, Leaf length (cm), Leaf breadth (cm), Leaf area (cm 2 ) and 1000 seed weight (gm). For all the characters under study non additive gene action was predominant as σ 2 GCA/ σ 2 SCA ratio was less than unity. It was observed that line CSV 15 and tester RVJ 1862 were good combiners for grain yield per plant while JJ 1022 was a good combiner for plant height, crosses JJ 1022 x JJ 938 and SPV2376 x RVJ 1862 was found desirable for plant height. SPV 2688 x RVJ 1862 and SPV2376 x JJ 938 were found good for grain yield per plant.