Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

PERFORMANCE OF WHEAT GENOTYPES UNDER OPTIMUM AND LATE SOWING CONDITION (Pages : 34 - 39)

A field experiment was conducted in research farm of Wheat Research Centre, Dinajpur (25°38´ N, 88°41´ E and 38.20 m above sea level), Bangladesh, during wheat season of 2003-04 with 10 wheat genotypes (Gen/3/Gov, PB 81/PVN, Fang 60, Kanchan, Sari 82, HI 977, HAR 424, PF 70354, Opata and Fyn/Pvn) sown on optimum (November 17) and late (December 21) condition in a randomized complete block design with three replications to evaluate the performance of these genotypes under optimum and late sown condition and to find out the suitable time of sowing for a specific genotypes. Under optimum sown condition, differences among the genotypes were found to be significant in respect of grain yield, biomass at anthesis, ground cover at 4-5 leaf stage, days to anthesis, maturity and flag leaf emergence, plant height, grain filling duration and 1000-grain weight, and insignificant for biomass at final harvest, ground cover at anthesis, chlorophyll content of the flag leaf and differences in temperature (DT) between canopy and ambient. While for the late sown condition, grain yield, biomass at anthesis, ground cover at 4-5 leaf and DT were the only characters affected non-significantly due to variation among the treatments. For almost all the traits, reduction was caused due to late sowing with a maximum and pronounced effect noticed for grain yield (26.30%). Genotype ‘Gen/3/Gov’ seemed to be the best entry for late planting with reasonably high yield, moderate grain size and growth period. Correlation studies revealed that under timely-sown condition, biomass at final harvest and chlorophyll content (SPAD) were strongly and positively correlated with grain yield. Under late-sown condition, grain yield was positively and significantly correlated with biomass, ground cover at anthesis, days to anthesis, flag leaf emergence and maturity as well as SPAD and DT. Download