Formerly International Journal of Basic and Applied Agricultural Research

Improving Brassica juncea performance through hybrid breeding strategies: a focus on combining ability and heterosis analysis

ANU SINGH, USHA PANT, PREETI LOHANI, A. S. JEENA and ANIL KUMAR
Pantnagar Journal of Research, Volume - 22, Issue - 2 ( May-August 2024)

Published: 2024-08-31

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Abstract


Seven advanced lines/varieties of Indian mustard (Brassica juncea L.) were selected for building the experimental materials. It consisted of 3 lines and 4 testers, mated in Line×Tester design during rabi season 2021-22. Fifteen parameters, including seed yield per plant (g), glucosinolate content (µmole/g), oil content (%), and erucic acid content (%), were assessed in RBD during the rabi season of 2022–2023 for parental lines and their 12 F1 s. Analysis of variance for combining ability showed significant differences amid treatments for all the characters; except for seeds per siliqua and siliqua density. Tester PWR 13-8 was a good combiner for a maximum of eight traits, including seed yield per plant and oil content. Lines NRCHB-101 and Kranti were good combiners for seed yield per plant. The cross-combination Giriraj × Heera for seed yield per plant, NRCHB-101 × PWR 13-8 for glucosinolate content, Kranti × PWR 13-8 for oil content, and Kranti × Donskaja for erucic acid content had the highest significant SCA effect. Cross combination Kranti × PWR 13-8 showed the highest mid-parent and better-parent heterosis for seed yield per plant. Cross-combination NRCHB-101 × PWR 13-8 showed the highest economic heterosis (222.81**) for seed yield per plant along with high estimates, i.e., -17.24** for mid-parent heterosis, -22.06** for better-parent heterosis and 26.88** for economic heterosis, for glucosinolate content. Cross Kranti × PWR 13-8 showed the highest mid-parent heterosis (5.97**), and Giriraj × Bio YSR showed the highest better-parent (5.07**) and economic heterosis (9.11**) for oil content.


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