Pollination studies and development of day neutral cultivars in strawberry (Fragaria x ananassaDuch.)

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dc.contributor.advisorSharma, Girish
dc.contributor.authorSuman Lata
dc.date.accessioned2017-06-03T11:11:39Z
dc.date.available2017-06-03T11:11:39Z
dc.date.issued2016
dc.description.abstractThe present investigation entitled “Pollination studies and development of day neutral cultivars in strawberry (Fragaria x ananassa Duch.) was carried out during 2011-12 and 2012-13 in the experimental field of Department of Fruit Science, Dr Y SParmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh. In experiment 1,variability, correlation and path analysis were studied in sixteen strawberry cultivars. ‘Chandler’ outperformed all other cultivars for vegetative characters such as plant height, plant spread, number of leaves, leaf area, number of runners and number of fruits per plant. Fruit size, weight and yield were maximum in cultivar Gorella.High coefficients of variability for total yield, number of fruits per plant average berry weight and number of runners per plant may be used for improvement through selection. Total yield showed both high heritability coupled with high genetic gain.Yield per plant was positively and significantly associated with plant height , plant spread, leaf number per plant, leaf area, number of runners per plant, fruit length, fruit breadth, number of achenes per fruit, number of fruits per plant, average berry weight.Plant spread had positive direct effect on yield / plant in the first year and in second year for number of fruits / plant, number of runners / plant, leaf number, fruit breadth and fruit weight, days to maturity , number of achenes / fruit , TSS .In experimentII, malformed fruit formation was improved by hand and cross pollination. In hand pollination ‘Fern’ and ‘Shasta’ had least malformed fruits. When hand pollinated,‘Pajaro’ x ‘Catskill’ and ‘Belrubi’ x ‘Douglas’ showed least malformed fruits. Maximum fruit set with better fruit size was from cross-pollination, followed by hand and open pollination and least was in self-pollination.In experiment III, ethrel (500 ppm) resulted in higher (86.67 %) germination followed by 200 ppm gibberellic acid (84.33 %).The line ‘Chandler’ exhibited good general combing ability for plant height , spread, leaf area, fruit size, number of fruits per plant and TSS and ‘Sweet Charlie’ was good combiner for plant height, spread, fruit size, fruit weight and TSS.Among the testers ‘Torrey’ showed good GCA for plant height, leaf number, leaf area, fruit length, fruit weight and ‘Selva’ for leaf area, number of fruits per plant and TSS.Combining ability depicted prominent role of non-additive gene action formost of the traits except plant height, fruit breadth and TSS.Variability among the crosses was mainly due to higher contribution of lines compared to individual contribution of testers and line x tester interaction.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810017014
dc.language.isoenen_US
dc.publisherYSPUen_US
dc.subFruit Science
dc.subjectfruits, developmental stages, strawberry (plant), planting, crossing over, germinability, confectionery, yields, biological phenomena, setsen_US
dc.these.typePh.D
dc.titlePollination studies and development of day neutral cultivars in strawberry (Fragaria x ananassaDuch.)en_US
dc.typeThesisen_US
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