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<p>Improvement in forage quality traits is an important objective in pearl millet breeding programs. An investigation was conducted during the rainy season 2021 at Punjab Agricultural University, Ludhiana to evaluate the variability for fodder traits in a recombinant inbred line mapping population for fodder traits. The population was selected from a total of 23 pair of mapping populations on the basis of parental contrast for the fodder-related traits during rainy season 2020. The core experiment was conducted in two replications in an alpha lattice design with 273 RILs and parents (Jakhrana S8-28–2-P4 and RIB 335/74-P1) at two locations in Punjab such as Ludhiana and Abohar. Significant variation was observed between the parents for various fodder-quality and biomass-related traits. Overall, Jakhrana was superior for majority of the biomass-traits and RIB for quality-related traits. The population mean deviated differentially towards both the parents for different traits at both the locations which illustrated the influence of environment on the performance of RILs. The genetic variability reported in the present investigation has endorsed the capability of the RIL population in generating an ample amount of recombination. High heritability with high GAM for biomass traits, especially TB, indicates predominance of additive gene action and effectiveness of direct selection in pearl millet. Conversely, IVOMD exhibited high heritability with moderate GAM, suggesting both additive and non-additive effects, and supporting the use of both selection and heterosis breeding. Transgressive segregants were recovered for all the traits and can be directly exploited to develop superior fodder hybrids or varieties. Stable lines for in vitro organic matter digestibility (RIL166, RIL54, RIL188, RIL57, RIL126) and total biomass (RIL256, RIL173, RIL133, RIL235, RIL179) were identified by modified AMMI stability analysis. These lines could directly be used for varietal development and improvement purpose. Furthermore, the morphological and biochemical data generated by this experiment would be useful to map QTLs/genes for fodder-related traits.</p>

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Genetic variability and genotype-by-environment interaction for forage quality and biomass traits in pearl millet

  • 期刊论文

  • 发表日期：

    2026年7月3日

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  • Harmanpreet Singh Daduwal,
  • Ruchika Bhardwaj,
  • R. S. Sohu,
  • Jaspal Singh Lamba,
  • Manpreet Singh,
  • Rakesh K. Srivastava

摘要

Improvement in forage quality traits is an important objective in pearl millet breeding programs. An investigation was conducted during the rainy season 2021 at Punjab Agricultural University, Ludhiana to evaluate the variability for fodder traits in a recombinant inbred line mapping population for fodder traits. The population was selected from a total of 23 pair of mapping populations on the basis of parental contrast for the fodder-related traits during rainy season 2020. The core experiment was conducted in two replications in an alpha lattice design with 273 RILs and parents (Jakhrana S8-28–2-P4 and RIB 335/74-P1) at two locations in Punjab such as Ludhiana and Abohar. Significant variation was observed between the parents for various fodder-quality and biomass-related traits. Overall, Jakhrana was superior for majority of the biomass-traits and RIB for quality-related traits. The population mean deviated differentially towards both the parents for different traits at both the locations which illustrated the influence of environment on the performance of RILs. The genetic variability reported in the present investigation has endorsed the capability of the RIL population in generating an ample amount of recombination. High heritability with high GAM for biomass traits, especially TB, indicates predominance of additive gene action and effectiveness of direct selection in pearl millet. Conversely, IVOMD exhibited high heritability with moderate GAM, suggesting both additive and non-additive effects, and supporting the use of both selection and heterosis breeding. Transgressive segregants were recovered for all the traits and can be directly exploited to develop superior fodder hybrids or varieties. Stable lines for in vitro organic matter digestibility (RIL166, RIL54, RIL188, RIL57, RIL126) and total biomass (RIL256, RIL173, RIL133, RIL235, RIL179) were identified by modified AMMI stability analysis. These lines could directly be used for varietal development and improvement purpose. Furthermore, the morphological and biochemical data generated by this experiment would be useful to map QTLs/genes for fodder-related traits.