Phenological changes of different wheat genotypes (Triticum aestivum L.) in high temperature imposed by late seeding
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2013, Vol 3, Issue 8
Abstract
The experiment was carried out in the field of Wheat Research Centre (WRC), Bangladesh Agricultural Research institute (BARI), Nashipur, Dinajpur, Bangladesh in the Rabi season, 2012-13 to observe the effect of high air temperature on phenological traits of some advanced spring wheat genotypes and to screen heat tolerant genotypes at irrigated late sowing (ILS) conditions.. The treatments were 4 dates of sowing viz. 30 Nov (D1), 15 Dec (D2), 30 Dec (D3) & 14, Jan (D4) and 4 genotypes viz. BARI Gom 26 (V1), BAW 1051 (V2), BAW 1120 (V3) & BAW 1141(V4) The genotypes V2, V3, and V4 were undertaken as test genotypes and V1 as check. The design was split-plot with 3 replications. In ILS conditions, the genotypes faced higher temperature i.e. 19.3 to 26.8 0C mean temperature from 28 November, 2012 to 09 April, 2013 which reduced the duration of booting, heading, anthesis and physiological maturity stages resulting of decreasing the yield of different genotypes along with late seeding conditions. Among the tested genotypes, V4 exhibited the best performance of all in all ILS conditions compared to Irrigated timely sowing (ITS) condition since its phenological stages lasted longer than those of other genotypes. That means, it could tolerate high temperature. It concludes that BAW 1141 can be cultivated on D2 and D3 seeding to get yield more than 4.0 and 3.0 t ha-1, respectively as the most heat tolerant and one of the shortest life span genotype of all, even of all WRC released varieties till now.
Authors and Affiliations
Md. Nur Alam, Mst. Masuma Akhter, Md. Monwar Hossain, S. M. Mahbubul Alam
Keywords
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