Vol. 6, Issue 3 (2018)
Determination of extent of variability in wheat germplasm using augmented randomized block design
Author(s): Neha Joshi, Anil Kumar and Shoukat A Rather
Abstract: Low level of gene pool variation exhibited by modern wheat cultivars may be due to the use of narrow genetic base in breeding programmes and also due to environment conditions. The presence of ample genetic diversity in the base material causes better chance of evolving desirable plant types. Yield is a complex polygenic character and is resultant of interactions of several genetic and environmental factors, hence it requires continuous improvement involving the diverse material. The present investigation was carried out in rabi season, 2015-16 at N.E. Borlaug Crop Research Centre, G. B. Pant Univ. of Agriculture & Technology, Pantnagar. The experimental materials for the present investigation comprised of 180 germplasm accessions and four checks, namely, WH 1105, DPW 621-50, PBW 343 and Agra Local. These genotypes were evaluated in augmented block design and observations were recorded for 15 characters viz., days to 75% heading, days to maturity, plant height, number of tillers per meter, peduncle length, spike length, number of spikelets per spike, number of grains per spike, grain weight per spike, 1000 grain weight, biological yield, grain yield, harvest index, protein content and test weight. Variance (mean sum of squares) was found highest for biological yield followed by grain yield. The coefficient of variability was found to be the highest for grain yield and lowest for test weight. On the basis of findings of the study, six desirable donors for each character were identified on the basis of character mean. IC-532150, IC-82219, IC-753957, IC-58012 and IC-532931 were found to be the most promising donor genotypes for grain yield. These genotypes can be used for future breeding programme to improve the yield potential of the variety. For other characters, genotypes can be picked up from different groups, formed on the basis of their ranking
Pages: 1074-1082 | 762 Views 166 Downloads
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How to cite this article:
Neha Joshi, Anil Kumar, Shoukat A Rather. Determination of extent of variability in wheat germplasm using augmented randomized block design. Int J Chem Stud 2018;6(3):1074-1082.
