Studies on Correlation and Genetic Diversity in Faba bean (Vicia faba L. ) Genotypes
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Date
2015-07
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College of Forestry, Ranichauri, V.C.S.G. Uttarakhand University of Horticulture and Forestry
Abstract
The present investigation was conducted during Rabi, 2013 at Crop Improvement Research Block of VCSG Uttarakhand University of Horticulture and Forestry, Ranichauri Campus with 73 diverse genotypes of faba bean. The 73 genotypes including three checks viz., Vikrant, PRT-7 and PRT-12 were planted in an augmented design during. Variability, correlation, path analysis and genetic divergence was studied for characters viz. field emergence, days to 50% flowering, days to maturity, plant height (cm), number of pods per plant, pod length (cm), number of seeds per pod, 100- seed weight (g) and seed yield per plant (g). Data were analysed statistically for variability, correlation, path coefficient analysis and divergence.
Analysis of variance revealed among the checks were significant for six characters viz., significant for days to maturity, field emergence, plant height (cm), number of pods per plant, pod length (cm) and seed yield per plant (g). The correlation revealed that Seed yield per plant showed positive correlation with pod length, while days to maturity exhibited highly significant and positive correlation with days to 50% flowering, number of pods per plant showed significant positive correlation with field emergence and highly significant and positive correlation with plant height, number of seeds per pod showed significant and positive correlation with plant height and 100- seed weight also showed highly significant and positive correlation with number of pods per plant . The results of path coefficient analysis using simple correlation coefficient showed that highest positive direct contribution towards seed yield per plant was exhibited by pod length followed by number of pods per plant and days to maturity.
In genetic divergence, all seventy-three genotypes were grouped into 6 clusters irrespective of geographical and genetic diversity. The highest inter cluster distance was observed between cluster II and cluster VIII followed by cluster IV and cluster VIII, cluster I and cluster VIII suggesting wide diversity among these groups. Considering cluster mean and genetic distance the crossing between HB-69, EC- 331564, HB-76, HB- 87 and HB-10, HB-16, HB-18 genotypes suggested to recombine the gene for high seed yield for temperate conditions like mid hills of Uttarakhand.
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