GENETIC ANALYSIS OF YIELD AND CONTRIBUTING TRAITS IN STRAWBERRY (Fragaria × ananassa Duch.)
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Date
2024-06-11
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UHF Nauni
Abstract
The present investigation entitled “Genetic analysis of yield and contributing traits in strawberry (Fragaria ×ananassa Duch.)” was carried out at the Experimental Farm, Department of Fruit Science, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh during 2021-2023. The experimental material was comprised of F1 population of forty crosses, developed by crossing ten lines and four testers according to Line × Tester mating design. All the parents and their hybrids were planted in a Randomized Complete Block Design for their comparative evaluation. The observations were recorded on plant height, plant spread, number of leaves, leaf area, number of runners per plant, days to runner formation after planting, flower size, petal size, number of stamens, days to flowering after planting, duration of flowering, fruit length, fruit breadth, number of sepals, number of achenes per fruit, days to maturity from flowering, number of fruits per plant, average berry weight, total yield, fruit firmness, total soluble solids, titratable acidity, total sugars, reducing sugars, non-reducing sugars, anthocyanin content and ascorbic acid. The analysis of variance indicated highly significant differences among the genotypes for all the traits studied. Experimental results revealed that three lines viz., Nabila, Douglas and Royal Round and two testers viz., Camarosa and Sweet Charlie were found superior on the basis of their general combining ability studies. Four cross combinations viz., Nabila × Sweet Charlie, Nabila × Chandler, Royal Round × Camarosa and Meeherancher × Sweet Charlie were found best on the basis of mean performance, specific combining ability and heterosis studies. The components due to dominance (2 D) were higher in magnitude than additive (2 A) for all the traits under study except plant height, duration of flowering, average berry weight, total yield, total soluble solids and anthocyanin content indicated that the role of non-additive gene action was predominant. Hence, these parents and cross combinations can be used in further crop improvement programmes in strawberry.