Abstract
Forty one wheat genotypes were planted at the Nuclear Institute for Food and Agriculture (NIFA), Peshawar, Pakistan during the Rabi season: 2009 to 2010 and were evaluated for genetic diversity regarding different metric traits, that is, plant height, days to 50% flowering, time to reach physiological maturity (days), spikelets per spike and spike length (cm). Significant genotypic differences were observed for all measured traits, indicating a considerable amount of variation among genotypes. The estimates of genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were highly significant (P≤0.05) for spike length, days to 50% flowering and plant height. High heritability estimates were recorded for plant height, days to 50% flowering, days to heading, spikelets per spike and spike length. Plant height, days to physiological maturity and spikelets per spike also indicate high expected genetic advance. Based on the Euclidian dissimilarity distance, cluster analysis separated the wheat genotypes into four groups and nine different clusters. Key words: Heritability, variability, genetic diversity, yield components.
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