“Diversity Assessment of Seedling Guava (Psidium guajava L.) in Jammu Sub-tropics
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Date
2019-10
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Sher-e-Kashmir University of Agricultural Sciences & Technology of Jammu, Jammu
Abstract
The present study entitled “Diversity assessment of seedling guava (Psidium guajava L.) in Jammu sub-tropics” was carried out during the year 2017-2018 in the sub tropical region of Jammu province at three locations viz., Jammu, Samba and Akhnoor to assess the genetic diversity present in the seedling population of guava. Data was recorded on tree and fruit characters and diversity was estimated using different genetic parameters. Results revealed that in the population plant height, plant spread, plant volume, trunk girth, leaf area, fruit weight, fruit diameter, fruit volume, pulp percentage, total sugars, reducing sugar, vitamin C, yield and yield efficiency ranged between 3.16 -5.98 m, 2.37 - 3.97 m, 12.38 - 74.15 m3, 20.02 - 27.27 cm, 43.67 - 102.52 cm2, 86.70 - 177.17 g, 5.13 - 6.70 cm, 92.48 - 180.07 cm3, 96.45 - 99.06%, 6.19 - 10.50%, 3.22 - 6.51%, 128.40 - 215 mg/100 g, 16.0-24.80 kg/tree and 0.34-0.53 Kg/cm2 respectively. Phenotypic coefficient of correlation was higher than genotypic coefficient of correlation for all the characters and broad sense heritability ranged between 37.14 to 81.14% for different characters. Fruit yield was significantly correlated with fruit weight fruit diameter, pulp percentage, seed weight, hundred seed weight and yield efficiency. Path analysis revealed that characters like fruit weight, fruit diameter, pulp weight, pulp percentage, seed weight and yield efficiency had direct effect on the fruit yield. On the basis of cluster analysis all the genotypes studies were divided into five cluster having 124.71 to 185.20 inter-cluster distance and 274.40 to 834.74 intra-cluster distance. Five major components were detected using principle component analysis exhibiting 86.07% of total variation. The major characters contributing towards variation were yield, trunk cross sectional area, plant spread, fruit weight, leaf area, leaf width, leaf length and yield efficiency. On the basis of the study six guava genotypes were identified for important horticultural traits.
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