- Genetic Divergence Analysis in Advanced Breeding Lines of Groundnut (Arachis hypogaea L.). - Genetic diversity among 30 advanced breeding lines of groundnut were estimated using Mahalanobis D2 statistic for 21 characters. - The analysis of variance revealed significant differences among the advanced breeding lines for all characters. - Based on Tocher's method, 30 advanced breeding lines were grouped into ten clusters. - Cluster III and IV contain six genotypes and cluster I contain four genotypes, cluster IX contain two genotypes remaining clusters (V, VI, VII, VIII and X) are monogenotypic clusters, this grouping indicated considerable diversity among the breeding lines. - Groundnut, Cluster, D2 and genetic divergence. - As groundnut is an important oilseed crop used for confectionary purpose, there is a need to improve the quality traits of groundnut. - Hence selection for quality traits in groundnut is necessary in breeding programmes.. - Thus, the knowledge of genetic variability and genetic divergence in combination with character association allows a breeder to select suitable and divergent genotypes for their use in breeding strategies and to formulate a suitable selection scheme.. - The observations were recorded on the basis of five randomly selected representative plants from each replication for physiological, yield and quality traits viz., days to 50 % flowering, days to maturity, SPAD chlorophyll meter reading at 45 DAS, specific leaf area at 45 DAS, plant height, number of primary branches per plant, number of secondary branches per plant, number of mature pods per plant, 100-pod weight, 100-kernel weight, shelling per cent, sound mature kernel per. - cent, dry haulms yield per plant, harvest index, kernel yield per plant, oil content, protein content, sucrose content, total soluble sugars, total free amino acids and pod yield per plant.. - Days to 50 % flowering and days to maturity were recorded on plot basis. - The 30 genotypes of groundnut were grouped into ten clusters based on D2 value (Table 1).. - The inter-cluster distance (Table 2) was larger than the intracluster distance which indicated that greater diversity is present among the genotypes of distant group {Hampannavar and Khan (2018), Raghuwanshi et al., (2016), Zaman et al., (2010. - Similar results were also suggested by Choudhary et al., (1998). - The Cluster mean value(Table 3)for different clusters indicated that cluster I recorded the highest cluster mean for early maturity, 100-kernel weight, 100-kernel weight, shelling percent, sound mature kernels per plant, dry haulms yield per plant, oil content, sucrose content, total free amino acids and total soluble sugars. - Cluster IV, VI, VIII and IX was the best source for kernel yield per plant, pod yield per plant, number of mature pods per plant, sound mature kernel percent and oil content. - Cluster I and III was best source for days to 50% flowering and days to maturity.. - Contribution of character towards divergence (Table 4) was observed maximum in total free amino acids followed by number of secondary branches per plant, sound mature kernel percent, sucrose content, specific leaf area, total soluble sugars, 100-pod weight, number of mature pods per plant, pod yield, 100- kernel weight, dry haulms yield per plant, kernel yield, protein content.. - The present findings for the yield characters are in conformity with those reported earlier in groundnut by Vasanthi et al., (2015), Venkatesh et al., (2016), Sardar et al., (2017) and Saritha et al., (2018). - Sardar et al., (2017) also recorded similar result for least performance of shelling percent to genetic divergence. - clearer for kernel yield per plant followed by pod yield per plant, biological yield per plant, 100-kernel weight and number of pods per plant.. - The present findings are in conformity with those reported earlier in groundnut (Vasanthi et al., (2015) and Saritha et al., (2018). - The greatest contribution of 100-kernel weight towards divergence was also earlier reported by Sudhakar et al., (2008), Venkateswarulu et al., (2011), Venkatesh et al., (2016), Ganvit et al., (2018) and Namrata et al., (2018).It has been suggested that the character with maximum contribution towards divergence should be given importance for undergoing hybridization programme.. - Based on genetic divergence studies involving 30 advanced breeding lines of groundnut, the following genotypes were suggested for successful hybridization programme. - Table.1 Clustering of advanced breeding lines of groundnut based on Tocher's method Cluster Number of. - Table.2 Inter and Intra cluster (diagonal) average of D 2 and D values (in parentheses) of advanced breeding lines of groundnut. - Table.3 Cluster means for physiological, yield, its attributes and quality characters in 30 advanced breeding lines of groundnut. - DF : Days to 50% flowering NMP : Number of mature pods per plant. - KYP : Kernel yield per plant (g). - DM : Days to maturity 100-PW : Hundred pod weight (g). - Sound mature kernel per cent. - NPB : Number of primary branches per plant. - DHY : Dry haulms yield per plant (g). - NSB : Number of secondary branches per plant. - PYP : Pod yield per plant (g). - 1 Days to 50 % flowering 0 0. - 2 Days to maturity 0 0. - 6 Number of primary branches per plant 1 0.23. - 7 Number of secondary branches per plant 91 20.92. - 8 Number of mature pods per plant 5 1.15. - 13 Dry haulms yield per plant. - 15 Kernel yield per plant (g) 1 0.23. - 21 Pod yield per plant (g) 4 0.92. - Comparative study of D2 and metroglyph analysis in groundnut. - (Arachis hypogaea L. - Genetic divergence studies for yield and its component traits in groundnut (Arachis hypogaea. - L.).Journal of Pharmacognosy and Phytochemistry. - Analysis of genetic diversity of groundnut (Arachis hypogaeaL.) genotypes collected from various parts of India. - Journal of Pharmacognosy and Phytochemistry. - Assessment of genetic diversity among groundnut (Arachis hypogaea L.) genotypes. - International Journal of Bio-Resource and Stress Management. - Genetic divergence in groundnut (Arachis hypogaea L.).. - Electronic Journal of Plant Breeding.. - Divergence study in groundnut breeding lines. - Journal of Pharmacognosy and Phytochemistry.. - Genetic divergence studies in groundnut (Arachis hypogaea L. - Electronic Journal of Plant Breeding. - Genetic divergence for yield, physiological and quality traits in groundnut (Arachis hypogaea L.).. - Genetic diversity based on physiological attributes among released and pre-release cultures of groundnut (Arachis hypogaea L.).. - Genetic divergence in confectionary types of groundnut (Arachis hypogaea L. - Bangladesh Journal of Plant Breeding and Genetics. - Genetic Divergence Analysis in Advanced Breeding Lines of Groundnut (Arachis hypogaea L.).
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