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50 years of rice breeding in Bangladesh: genetic yield trends.

ABSTRACT: To assess the efficiency of genetic improvement programs, it is essential to assess the genetic trend in long-term data. The present study estimates the genetic trends for grain yield of rice varieties released between 1970 and 2020 by the Bangladesh Rice Research Institute. The yield of the varieties was assessed from 2001-2002 to 2020-2021 in multi-locations trials. In such a series of trials, yield may increase over time due to (i) genetic improvement (genetic trend) and (ii) improved management or favorable climate change (agronomic/non-genetic trend). In both the winter and monsoon seasons, we observed positive genetic and non-genetic trends. The annual genetic trend for grain yield in both winter and monsoon rice varieties was 0.01 t ha^-1, while the non-genetic trend for both seasons was 0.02 t ha^-1, corresponding to yearly genetic gains of 0.28% and 0.18% in winter and monsoon seasons, respectively. The overall percentage yield change from 1970 until 2020 for winter rice was 40.96%, of which 13.91% was genetic trend and 27.05% was non-genetic. For the monsoon season, the overall percentage change from 1973 until 2020 was 38.39%, of which genetic and non-genetic increases were 8.36% and 30.03%, respectively. Overall, the contribution of non-genetic trend is larger than genetic trend both for winter and monsoon seasons. These results suggest that limited progress has been made in improving yield in Bangladeshi rice breeding programs over the last 50 years. Breeding programs need to be modernized to deliver sufficient genetic gains in the future to sustain Bangladeshi food security.

SUBMITTER: Rahman NMF

PROVIDER: S-EPMC9867671 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature

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50 years of rice breeding in Bangladesh: genetic yield trends.

Rahman Niaz Md Farhat NMF Malik Waqas Ahmed WA Kabir Md Shahjahan MS Baten Md Azizul MA Hossain Md Ismail MI Paul Debi Narayan Rudra DNR Ahmed Rokib R Biswas Partha Sarathi PS Rahman Md Chhiddikur MC Rahman Md Sazzadur MS Iftekharuddaula Khandakar Md KM Hadasch Steffen S Schmidt Paul P Islam Md Rafiqul MR Rahman Md Akhlasur MA Atlin Gary N GN Piepho Hans-Peter HP

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik 20230121 1

To assess the efficiency of genetic improvement programs, it is essential to assess the genetic trend in long-term data. The present study estimates the genetic trends for grain yield of rice varieties released between 1970 and 2020 by the Bangladesh Rice Research Institute. The yield of the varieties was assessed from 2001-2002 to 2020-2021 in multi-locations trials. In such a series of trials, yield may increase over time due to (i) genetic improvement (genetic trend) and (ii) improved managem ...[more]

PMID: 36680594

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Dataset Information

50 years of rice breeding in Bangladesh: genetic yield trends.

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50 years of rice breeding in Bangladesh: genetic yield trends.

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