Morphological and biochemical characterization of passion fruit genotypes found in North East Region of India
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Date
2020-08-19
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College of Horticulture and Forestry, Central Agricultural University, Pasighat
Abstract
Under the present investigation an extensive survey was conducted in which different Passiflora genotypes were collected from North East Region of India (Arunachal Pradesh, Assam, Manipur, Mizoram, Nagaland, Sikkim and Tripura) during 2018-20.The genetic diversity was studied through morphological, biochemical and seed protein profiling to identify superior genotypes having high yield and juice content.
Analysis of variance in the present investigation revealed significant differences among fifteen genotypes. Maximum fruit yield was recorded in the genotypes P14 (26.23 kg/vine), P13 (10.47 kg/vine) and P6 (10.07 kg/vine), whereas genotypes P14 (117.92 mL/fruit), P13 (34.20 mL/fruit) and P2 (34.17 mL/fruit) were identified for higher juice content. Genotypes P14 (27.33 days), P4 (14 days) and P12 (12 days) were exhibited maximum shelf-life at ambient room temperature.
Genotypic and phenotypic coefficients of variation were found high for fruit yield, seed weight/fruit, 100 seeds weight, seed width, vitamin A content, juice content, anthocyanin content in petiole and total flavonoids content. The characters like, tendril length, flower length, 100 seeds weight, fruit yield/vine, number of fruits/vine, vitamin A content, phenol content in leaves and total soluble solid content recorded high heritability coupled with high genetic advance which indicated that these characters are under additive gene effects. Correlation studies revealed that characters like number of fruits/vine had significant positive correlation with fruit yield. Whereas shelf life, total flavonoids, titratable acidity and anthocyanin content of leaves had significant positive correlation with juice contents both at genotypic and phenotypic level.
Fruit length, seed length, seed width, number of seeds/fruit, seed weight/fruit had maximum positive direct effect on fruit yield/vine whereas shelf life, total flavonoids, titratable acidity and anthocyanin content of leaves had maximum positive direct effect on fruit juice content at genotypic level.
The sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) showed considerable variation in protein band numbers in fifteen passion fruit genotypes ranging from 6 to 11. Genotypes P13 with P3; P13 with P6; P14 with P5; P15 with P1, P4, P6 and P10 were more distantly related to each other at genotypic level.
Based on the results obtained from the present investigation, it can be concluded that the collected passion fruit genotypes exhibited noticeable variation in the morphological and genetical characteristics which could be utilized for further passion fruit crop improvement works.
Description
Genotypic and phenotypic coefficients of variation were found high for fruit yield, seed weight/fruit, 100 seeds weight, seed width, vitamin A content, juice content, anthocyanin content in petiole and total flavonoids content. The characters like, tendril length, flower length, 100 seeds weight, fruit yield/vine, number of fruits/vine, vitamin A content, phenol content in leaves and total soluble solid content recorded high heritability coupled with high genetic advance which indicated that these characters are under additive gene effects. Correlation studies revealed that characters like number of fruits/vine had significant positive correlation with fruit yield. Whereas shelf life, total flavonoids, titratable acidity and anthocyanin content of leaves had significant positive correlation with juice contents both at genotypic and phenotypic level.