Author(s):

Manisha Saini and Shweta

Abstract: Fifty genotype of wheat were evaluated to access the genetic diversity by using principle component analysis for eleven quantitative traits in wheat viz. days to 50% flowering, days to reproductive phase, days to maturity, plant height (cm), number of reproductive tillers per plant, spike length (cm), number of spikelets per spike, number of grains per spike, grain weight per spike (gm.), test weight (gm.) and grain yield per plant (gm.). Principal component analysis (PCA) indicated that four components (PC1 to PC4) accounted for about 77% of the total variation among traits in bread wheat genotypes. Out of total principal components retained PC1, PC2 and PC3 with values of 34.49%, 20.63% and 13.06% respectively contributed more to the total variation. The first principal component had high positive loading for 9 characters out of 12 viz. days to 50% flowering, days to maturity, spike length, number of spikelets per spike, test weight, grain yield per plant (gm.), grain weight per ear (gm.), days to reproductive phase, number of grains per spike. The result of present study could be exploited in planning and execution of future breeding programme in wheat.

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