Assessment of genetic variability in rice (Oryza sativa L.) following generation mean analysis

Abstract

The experiment was conducted in experimental Farm, Main Experimental Station of A.N.D. University of Agriculture & Technology, Narendra Nagar (Kumarganj), Ajodhya kharif season 2019 to estimate genetic variance in rice 4 cross combination including 6 generation, parents (P1, P2), the F1s, F2s, and back crosses with both the parents (B1 and B2) of crosses Swarna Sub-1 x CSR-10, (Sambha Sub-1 x CSR-10), (Pusa Sugandha -5 x CSR-10), Pusa Sugandha -5 x NDR-2064 with respect to yield and quality traits. Data was taken for 20 observations. The estimates of high genotypic and phenotypic variances in cross I for the characters like days to 50% flowering, chlorophyll a, chlorophyll b, carotene, total chlorophyll, plant height (cm), number of effective tillers/plant, flag leaf area (cm2), number of spikelet’s/panicle, protein content (%), in cross I, high GCV and PCV was recorded for days to 50% flowering, chlorophyll a, chlorophyll b, carotene, total chlorophyll, plant height (cm), number of effective tillers/plant, flag leaf area (cm2), number of spikelet’s/panicle, protein content (%) and grain yield/plant. Cross III shows high GCV and PCV for chlorophyll a, chlorophyll b, carotene, total chlorophyll, plant height (cm), number of effective tillers/plant, grains/panicle, flag leaf area (cm2), number of spikelet’s/panicle, grain size (l: b ratio), protein content (%). In cross IV high GCV was recorded for for chlorophyll a, chlorophyll b, carotene, total chlorophyll, , flag leaf area (cm2), number of spikelet’s/panicle, grains/panicle, grain size (l: b ratio), grain yield/plant (g) and PCV for trait days to 50% flowering, chlorophyll a, chlorophyll b, carotene, total chlorophyll, , flag leaf area (cm2), biological yield/plant (g), number of spikelet’s/panicle, grains/panicle, spikelet fertility (%), grain size (l: b ratio) and grain yield/plant (g).