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P-ISSN: 2618-060X, E-ISSN: 2618-0618   |   NAAS: 5.20

2025, Vol. 8, Special Issue 1

Assessment of combining ability and heterosis for seed yield and related traits in linseed (Linum usitatissimum L.) through diallel analysis


Divya Mahto and Rajkumar Mishra

The study involved eight linseed (Linum usitatissimum L.) genotypes, which were crossed following a diallel cross design (Griffing 1956 Model 1, Method 2) during the Rabi season of 2010-11, resulting in 28 distinct hybrid combinations (excluding reciprocal crosses). These 28 F1 hybrids, together with the eight parental lines and three check varieties (T-397, Neelum, and Allahabad Local), were evaluated using a Randomized Block Design (RBD) with three replications during the 2011-12 cropping season at the Field Experimentation Centre, Department of Genetics and Plant Breeding, SHIATS, Allahabad. A total of ten agronomic traits were recorded to assess both heterosis and combining ability. The analysis of variance (ANOVA) showed significant variation across all traits, indicating considerable genetic diversity within the study population. The cross M-42(169) × POLF-19(1765) showed the best performance in terms of seed yield and its components. Heterosis analysis revealed that the cross PbD2-42(2789) × GS-129(1018) exhibited the highest heterosis, heterobeltiosis, and economic heterosis for seed yield per plant. Combining ability analysis indicated significant differences for all traits, with FRW-6(973) and POLF-19(1765) identified as the best general combiners for seed yield and other important traits. The cross PbD2-42(2789) × GS-129(1018) demonstrated the highest positive specific combining ability (SCA) effect for seed yield per plant.
Pages : 520-526 | 46 Views | 21 Downloads
How to cite this article:
Divya Mahto, Rajkumar Mishra. Assessment of combining ability and heterosis for seed yield and related traits in linseed (Linum usitatissimum L.) through diallel analysis. Int J Res Agron 2025;8(1S):520-526. DOI: 10.33545/2618060X.2025.v8.i1Sh.2488
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