Genetic diversity in relation to number of clusters in wheat (Triticum aestivum)
1999
Suri, V. | Sharma, S.C. (Punjab Agricultural University, Ludhiana (India). Dept. of Genetics).
In the present investigation 200 genotypes of wheat (Triticum aestivum) have been grouped into sixteen clusters using Mahalanobis D2 statsitics, based on eight morphological characters namely; days to flowering, tiller number, plant height, 1000 grain weight, grains/ear, biological yield and harvest index. The genetic divergence was independent of pedigree as well as place of origin/place of release. Grain yield and tiller number were major contributors towards genetics divergence with moderate contribution from 1000-grain weight, grains/ear and harvest index. Grain yield was significantly and positively corelated with the component traits except plant height and days to flowering. Non-hierarchial Euclidean cluster analysis was also used to group 200 genotype into different number of clusters ranging from 2-16. Out of varying number of clusters (2 to 16), the one with 10-clusters was taken as no major differences either in mean cv values or their range were observed which suggested that grouping 200 genotypes into 10-clusters was as effective as that of 16-clusters without any loss of information
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