STUDY ON VARIABILITY AND SELECTION AT F6 GENERATION IN WHEAT (Triticum aestivum L.)

Abstract

An experiment was conducted at the central research farm, department of Genetics and Plant Breeding (25˚ 13’ latitude and 88˚ 23’ longitude, and about 37.5 m above sea level) of Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur to study variability of Wheat (Triticum aestivum L.) at F6 generation during the period from November 2017 to June 2018. The experiment included seven genotypes namely HSTU-57, HSTU-46, HSTU-30, HSTU-63, HSTU-15, HSTU-28, HSTU-19 and one check variety called BARI GOM – 28. The experiment was laid out in a Randomized Completely Block Design (RCBD) with three replications. Each block was subdivided into eight plots. Data recorded were days to 50 percent heading, days to 50 percent anthesis, plants per meter square, days to maturity, spikelets per meter square, plant height, tillers per plant, grains per spike, spikelets per spikes, biomass, 100-grain weight, harvesting index and yield per plot. All the data were statistically analyzed using the Rlanguage software program and mean differences were adjudged by least Significant Difference test (LSD). The results of the experiment revealed that there were a genetic variability and significant variations between genotypes were observed for all the characters. In case of main effects of genotypes, significantly the highest grain yield per plot (1.6 kg) was found in the genotype of HSTU-57 and the lowest grain yield per plot (1.22 kg) was recorded in the genotype of HSTU-19. Again, in case of thousand grain weight, it was significantly variation the highest thousand grain weight (44.32 gm) was observed in the genotype of HSTU-57 and the lowest thousand grain weight (32.55 gm) was recorded in the genotype of HSTU-30. Again, the highest biomass yield per plot among all genotypes (5.00 kg) was observed from the genotype HSTU-57 and the lowest biomass yield per plot among all genotypes (3.12 kg) was recorded from the genotype HSTU-19. The maximum population number of plants per meter square (63.67) was recorded from the genotype HSTU-57, whereas minimum population number of plants per meter square (35.00) was obtained from HSTU-19.