The Gene action for morpho-biochemical traits of sesame (Sesamum indicum) in different environments


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Authors

  • ANJU NEHRA Sri Karan Narendra Agriculture University, Jobner, Rajasthan 303 329, India
  • D K GOTHWAL Sri Karan Narendra Agriculture University, Jobner, Rajasthan 303 329, India
  • RASHMI YADAV ICAR-National Bureau of Plant Genetic Resources, New Delhi
  • M L JAKHAR Sri Karan Narendra Agriculture University, Jobner, Rajasthan 303 329, India
  • RAJESH C JEETERWAL Department of School Edu., GOR, Edu. deptt.,Todi, Manoharpur, Jaipur, Rajasthan
  • RAM KUNWAR Sri Karan Narendra Agriculture University, Jobner, Rajasthan 303 329, India

https://doi.org/10.56093/ijas.v93i3.133336

Keywords:

Additive gene, Combining ability, Half diallel, Morpho-biochemical traits, Non-additive gene

Abstract

Sesame (Sesamum indicum L.) is a drought tolerant oilseed crop with the highest oleic acid content, which is
yet to be explored for its hybrid vigour. Therefore, present study was carried at Sri Karan Narendra Agriculture
University, Jobner, Jaipur, Rajasthan during 2019–20 and 2020–21 to study the combining ability for 11 seed yield
and its attributing traits in 10 parents and their 45 crosses in sesame. The effects of general combining ability and
specific combining ability on morpo-biochemical attributes of cultivars were studied utilizing half-diallel cross. The
experiment was conducted using randomized blocks design (RBD) with 3 replications under different environmental
conditions. Significant variations were detected among parents for all of the recorded attributes and the F1 generation also showed significant differences for all recorded attributes. The GCA (General Combining Ability)/SCA (Specialized Combining Ability) variance ratio was found to be less than one, indicating that non-additive gene action predominated for all tested attributes. The parents RT–346, TKG–22, RT–372 and RT–351 emerged as good general combiners for seed yield per plant and its attributes in all environmental conditions. The crosses RT–346 × RT–351, TKG–22 × RT–372, RT–372 × RT–351 and RT–103 × RT–351 emerged as good specific cross combinations for seed yield and oil content. Incorporating F1 hybrids with a high SCA and parents with a high GCA into multiple crossings could also to be a beneficial strategy for improving seed production and oil content in sesame.

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References

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Submitted

2023-02-16

Published

2023-03-31

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How to Cite

NEHRA, A., GOTHWAL, D. K., JAKHAR, M. L., JEETERWAL, R. C., & KUNWAR, R. (2023). The Gene action for morpho-biochemical traits of sesame (Sesamum indicum) in different environments. The Indian Journal of Agricultural Sciences, 93(3), 263–268. https://doi.org/10.56093/ijas.v93i3.133336
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