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Title: Variability and hybrid evaluation studies in papaya (Carica papaya L.)
Authors: Das, Sukhen Chandra
Guide/Chairperson: M R, Dinesh
Keywords: Variability
Issue Date: 2001
Year of Submission: 2001
Abstract: In an experiment conducted at Indian Institute of Horticultural Research, Bangalore, halfsib analysis was carried out in papaya (Carica papaya L.) using twelve varieties and hybrids namely Coorg Honey Dew, Pink Flesh Sweet, Sunrise Solo, Waimanalo, Pant-2, Washington, Red Gold, Pusa Dwarf; PAU Selection, CO-4, H-39 and H-57. The objective of the study was to derive information on genetic advance and genetic advance over per cent mean, physic-chemical characteristics, which could be used in breeding programme and performance of new hybrids in comparison with their parents. In addition to the above, a study was conducted to see the seed setting pattern and to study the suitable flower type for seed production two varieties of Carica papaya, Sunrise Solo (Gynodioecious) and Washington (Dioecious). All the plant and fruit characters studied showed higher phenotypic variance than the genotypic variance which indicated the importance of environment in the manifestation of these characters. The heritability estimates were high for the characters fruit length, pulp thickness, plant height, total carotenoids, ascorbic acid, fruit breadth and TSS, indicating that these characters are amenable for improvement through selection. Fruit length, fruit volume fruit cavity index, fruit weight, total carotenoids and ascorbic acid had high heritability and genetic advance indicating additive gene action, which showed that selection cam be made easily based on parental performance. For most of the characters, the genotypic correlation values were more than the phenotypic correlation values indicating of influence of environment. With regard to the seed setting pattern, the study showed that the variety Sunrise Solo comparatively matures earlier than Washington, early germination of seed was also seen in this variety. The percentage of fruit set and germination percentage in seeds was more in case of the variety Sunrise Solo than in the variety Washington.
URI: http://www.erepo.iihr.ernet.in/handle/123456789/335
University in which they received their degree: University of Agricultural Sciences, Bangalore
Degree Level: M.Sc
Appears in Collections:DIVISION OF FRUIT CROPS

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