Yield Stability of Newly Released Wheat Varieties in Multi-environments of Bangladesh
Md. Ashraful Alam, Zahidul Islam Sarker, Md. Farhad, Md. Abdul Hakim, Naresh Chandra Dev Barma, Md. Israil Hossain, Md. Mokhlesur Rahman, Rabiul Islam
International Journal of Plant & Soil Science · pp. 150–161 · Published 28 Feb 2015
10.9734/IJPSS/2015/14824Abstract
Varietal adaptability to environmental fluctuations is important for the stabilization of crop production on both region and season. In this context, one thousand six trials with four wheat varieties viz., BARI Gom 25, BARI Gom 26, BARI Gom 27 and BARI Gom 28 were conducted in forty districts of 8 agricultural regions in Bangladesh during 2013-14. Objectives of this study were to evaluate the mean yield performance and yield stability of the newly released varieties in different regions of the country in different environmental status. Yield of 4 varieties significantly varied among the locations. The highest mean yield was obtained from Rangpur region (4275.15 kg ha-1) followed by Jessore region (4266 kg ha-1). Yield of these two regions were statistically similar but significantly higher than other regions. In AMMI analysis, AMMI-1 biplot showed that Rangpur and Rajshahi were favorable environments; Sylhet and Comilla were unfavorable environments. Considering varieties, BARI Gom 26 and BARI Gom 25 were more stable and can be recommended for all environmental condition of Bangladesh. On the other hand, BARI Gom 27 was the most sensitive to changing environments. In AMMI-2 biplot, Comilla, Sylhet and Dhaka were the most discriminating environments for all tested varieties, while BARI Gom 26 and BARI Gom 25 were more stable varieties. The most suitable varieties for Rangpur, Rajshahi and Mymensingh was BARI Gom 26; BARI Gom 25 for Sylhet; BARI Gom 27 for Comilla, Jessore and Barishal while BARI Gom 28 was suitable for Dhaka. Among the varieties, BARI Gom 26 and BARI Gom 25 had higher mean grain yield values coupled with small positive IPCA 1 scores and hence these are recommended for all the locations.
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