Variability and heritability under normal and rainfed conditions in Astivum wheat (Triticum astivum L.). | [International Journal of Biology and Biotechnology • 2009]

Author(s):

1. Kalimullah: Department of Plant Breeding and Genetics, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Pakistan

2. Rahm Din: Department of Plant Breeding and Genetics, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Pakistan

3. Muhammad Jamil Khan: Department of Soil Science, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Pakistan

4. Said Ghulam: Department of Soil Science, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Pakistan

5. Ibrarullah: Department of Horticulture, Faculty of Agriculture, Gomal University, Dera Ismail Khan, NWFP, Pakistan

Abstract:

A set of 22 experimental wheat lines along with four check cultivars were evaluated in irrigated and unirrigated environments with objectives to determine genetic and phenotypic variation and heritability estimates for yield and its traits. The two environments were statistically at par for grains spike-1, spike weight, biological yield, and grain yield except days to heading. Highly significant genetic variability existed among wheat lines (P ≤ 5 0.01) in the combined analysis across two test environments for traits except spike weight. Genotypes x environment interactions were non-significant for traits indicating consistent performance of lines in two test environments. However lines and check cultivars were two to five days early in heading under unimgated environment compared to the irrigated. Spike weight and grains spike` also reduced under unirrigated environments. Genetic variances were greater than environmental variances for most of traits. Heritability estimates were of higher magnitude (0.74 to 0.96) for days to heading, spike length, biological yield and grain yield, and low for spike weight in both the environments. The differential heritability for yield and yield related traits suggests simultaneous evaluation of wheat lines under the two environments.

Page(s): 139-148

DOI: DOI not available

Published: Journal: International Journal of Biology and Biotechnology, Volume: 6, Issue: 3, Year: 2009

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