Genetic variation, heritability and correlation analysis of forty seven pear genotypes under subtropics

Abstract: A study was undertaken to analyze the variation, heritability and correlation for vegetative and fruit characters for forty seven genotypes of pear at PAU, Ludhiana. Highest range of variation was recorded in fruit weight (70.0-213.0), TSS/acid ratio (19.7-69.0) and acidity (0.2- 0.5) with the mean of 151.11g, 43.70, and 0.29%, respectively. The PCV and GCV were observed maximum for the fruits number per spur, acidity, fruit weight and TSS/acid ratio. Heritability estimates were observed high for fruit weight (100%), flower number per spur (99.95%), TSS/acid ratio (99.79%), leaf breadth (99.73%) and fruit breadth (99.24%). A highly significant positive genotypic and phenotypic correlation was observed for fruit length with fruit weight (0.7463 and 0.7439), fruit breadth (0.5345 and 0.5318), TSS (0.2684 and 0.2667) and low significant with TSS/acid ratio (0.1796 and 0.1740). Similarly, positive significant genotypic correlation of fruit number per spur and flower number per spur was recorded with leaf breadth (0.2816 and 0.2814) and leaf length (0.5823 and 0.3598), respectively.