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

Abstract

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 (cm2) and 1000 seed weight (gm). For all the characters under study non additive gene action was predominant as σ2 GCA/ σ2 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.