Abstract
Twenty four (24) ‘Kashmiri Nakh’ pear (Pyrus pyrifolia) genotypes were studied to assess the overall degree of polymorphism, detect similarities among important tree, pomological, fruit quality and yield parameters. Eleven (11) variables were scored and subjected to multivariate analysis. Results show a considerable phenotypic diversity among ‘Kashmiri Nakh’ pear genotypes and differed significantly for the above traits. The cluster analysis classified the genotypes into two major groups according to their potential characteristics. The first group was found superior in terms of fruits total soluble solids (TSS), TSS/acidity and yield related characteristics and second group in fruits morphological (length, diameter, weight) and tree characteristics attributes. Principal component analysis (PCA) revealed that traits positively related to tree height, tree spread (N-S), tree spread (E-W), yield per tree, fruit weight, fruit length, fruit diameter and acidity, however negatively related to TSS and TSS/acidity. The first principal components expressed 33.58% of the total variation and second PC2 accounted for 23.76% of the total variation. A large proportion of variability observed in genotypes ‘TB-3, CHB-4, TBP-3, THP-7, TB-1, THP-1, TBP-1 and TB-2 were found unique for tree, fruit and yield attributing traits during PCA. Key words: Genetic variability, genotypes, cluster analysis, principal component analysis (PCA).
Highlights
Twenty fou ur (24) ‘Kash hmiri Nakh’ pear p (Pyrus pyrifolia) ge enotypes we ere studied tto assess the overall mological, frruit quality a degree of polymorphis p m, detect sim milarities am mong importtant tree, pom and yield parameters s
The first group g was fo ound superio or in terms off fruits total soluble solid ds (TSS), Total soluble solids (TSS)/acidity y and yield related cha aracteristics s and secon nd group in n fruits mo orphological
Princiipal compon nent analysis s (PCA) revealed that traits positiively related to tree heig ght, tree spre ead (N-S), trree spread
Summary
F and Ho orticultural Tec chnology, Ind dian Agriculturral Research Institute, New w Delhi-110012, India. Twenty fou ur (24) ‘Kash hmiri Nakh’ pear p (Pyrus pyrifolia) ge enotypes we ere studied tto assess the overall mological, frruit quality a degree of polymorphis p m, detect sim milarities am mong importtant tree, pom and yield parameters s. Results s show a considerable phenotypic diversity among a ‘Kash hmiri Nakh’ p pear genotypes and difffered signific cantly for the above traits. The cluster analys sis classified d the genotyp pes into two o major group ps according g to their potential ch haracteristics s. The first group g was fo ound superio or in terms off fruits total soluble solid ds (TSS), TSS/acidity y and yield related cha aracteristics s and secon nd group in n fruits mo orphological (length, diameter, weight). E-W), yield p per tree, fruit weight, fruit length h, fruit diame eter and aciidity, howev ver negativelly related to o TSS and T.
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