Genetic Gain and Productivity Trend Analysis for the Yield of Rice Varieties in Central India
Abhinav Sao¹*, Nair SK¹, Deepak Gauraha¹ and Girish Chandel²
1 Department of Genetics and Plant Breeding, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
2 Department of Plant Molecular Biology and Biotechnology, Indira Gandhi Krishi Vishwavidyalaya, Raipur
*Corresponding author E-mail: saoabhi27@yahoo.co.in
Volume 17-(1), 2024 ; https://doi.org/10.58297/OVJL7069 Click here for Pdf
Received: 13th December 2023; Accepted: 29th January, 2024
Abstract
The genetic gains and productivity trends were estimated for rice varieties developed by Indira Gandhi Krishi Vishwavidyalaya (IGKV), Raipur, India from 1905 to 2021 to assess the improvement in rice breeding programme. During this period (categorized into three different phases – 1, 2 and 3), 90 rice varieties were developed. Twenty-four varieties that became popular in different phases (Seven popular landraces from Phase 1, six varieties from Phase 2 and 11 varieties from Phase 3) were selected and evaluated for yield over five consecutive years (2017 to 2021) under replicated trials. The study revealed highest genetic gain of 1.50% for yield in the varieties that were released in Phase 2 with a yield enhancement of about 51 kg ha-1 year-1, followed by a genetic gain of 1.03% (43 kg ha-1 year-1) during Phase 3 and least genetic gain of 0.159% (4 kg ha-1 year-1) in Phase 1. This increase seems to be a result of planned and strategic research in crop improvement coupled with improved agronomic practices.
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