Elucidating Combining Ability through Line x Tester Analysis for Yield and its Contributing Traits in Isabgol [Plantago ovata (Forsk.)]

Author: Mukesh Kumar Yadav, Amit Dadheech, Amit Kumar and Deepak Meena

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Abstract

In order to explore the genetic architecture of isabgol (Plantago ovata Forsk.) through combining ability studies, the present investigation was carried out using 45 crosses which were produced using fifteen lines and three testers in a Line x Tester mating design at experimental farm of Plant Breeding and Genetics, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur (Rajasthan). The experimental material assessed in three environments: E1 (Rabi-2020-21, Instructional Farm, RCA, Udaipur), E2 (Rabi-2020-21, Krishi Vigyan Kendra, Badgaon) and E3 (Rabi-2020-21, Krishi Vigyan Kendra, Banswara) using a randomized block design with three replications in each environment. One of the important reasons for nearly stagnant yields of isabgol may be limited genetic improvement. This might have been due to a narrow genetic base and use of traditional breeding techniques with little or no understanding of the genetic architecture of the target populations. The good general combiner parental lines for seed yield per plant were L1, L5, L14 and L15. SCA effects revealed that out of 45 crosses, 13 hybrids exhibited significant positive SCA effects for seed yield per plant on pooled basis. The crosses, L10 × T3, L11 × T1, L5 × T2 and L1 × T3 showed positive and significant SCA effects in all the environments and over the environments for seed yield per plant. Cross L10 × T3 showed highest positive and significant SCA effects in all the three environments as well as on pooled basis for seed yield and other yield attributing traits.

Keywords

Combining ability, Isabgol, Line x Tester and Environment

Conclusion

The crosses, L10 × T3, L11 × T1, L5 × T2 and L1 × T3 showed positive and significant SCA effects in all the environments and over the environments for seed yield per plant. Cross L10 × T3 showed highest positive and significant SCA effects in all the three environments as well as on pooled basis for seed yield and other yield attributing traits. However, due to non-significant economic heterosis and low per se performance for seed yield, the hybrid cannot be selected only on the basis of significant SCA without high per se as a result, high per se performance and significant economic heterosis, as well as a good GCA of parents, should be used to select promising hybrids.

References

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How to cite this article

Mukesh Kumar Yadav, Amit Dadheech, Amit Kumar and Deepak Meena (2023). Elucidating Combining Ability through Line x Tester Analysis for Yield and its Contributing Traits in Isabgol [Plantago ovata (Forsk.)]. Biological Forum – An International Journal, 15(10): 14-20.