Studies on genetic diversity of citrus in east Siang district of Arunachal Pradesh

The present study on variability, heritability, genetic advance as percentage of mean and isozyme analysis in 32 citrus genotypes were carried out for yield and yield attributing characters. The genotypes exhibited significant differences for all the characters under study. A wide range of variability in PCV and GCV was observed for leaf lamina length, leaf lamina width, ratio (leaf lamina length; leaf lamina width), leaf thickness, fruit length, fruit breadth, fruit weight, rind weight, rind thickness, juice content, no. of seed per fruit, seed weight, seed length, seed breadth, TSS%, acidity%, ascorbic acid, reducing sugar, total sugar and yield. High heritability and high genetic gain were observed for leaf lamina length, leaf lamina width, ratio (leaf lamina length and leaf lamina width), leaf thickness, fruit length, fruit breadth, fruit weight, rind weight, rind thickness, juice content, no. of seed per fruit, seed weight, seed length, seed breadth, TSS%, acidity%, ascorbic acid, reducing sugar, total sugar and yield, where as rind weight showed low genetic gain. The result revealed that genotypic correlation coefficient values were higher in magnitude than phenotypic correlation coefficient values. Moreover, peroxidise isozymes analysis on selected 32 Citrus genotypes revealed 12polymorphic kochi and 52 alleles with Rm values ranging from 0.20 to 0.90.00.