Submitted to: Proceedings of Florida State Horticultural Society
Publication Type: Trade Journal
Publication Acceptance Date: June 1, 2005
Publication Date: December 1, 2005
Citation: Olano, C.T., Schnell II, R.J., Quintanilla, W.E., Campbell, R.J. 2005. Pedigree analysis of Florida mango cultivars. Proceedings of Florida State Horticultural Society. 118:192-197. Interpretive Summary: The National Germplasm Repository in Miami maintains a large collection of mango cultivars. The collection includes 63 cultivars that were selected in Florida, as well as 129 cultivars introduced into Florida from India, Asia and other locations. The Florida cultivars were not the result of breeding programs and historical information on their parentage is incomplete. In order to construct a likely pedigree for each Florida cultivar, all mango cultivars in the collection were divided into four sets of parents and offspring, based on introduction dates of accessions into Florida and selection dates for Florida varieties. We then used 25 microsatellite markers to obtain genetic fingerprints for all cultivars, and parentage analysis was performed using a software program. Eighty five of the 126 possible parents were identified. Sixty three of the 85 parents identified across the four sets were other Florida cultivars. Results suggest that as few as four Indian cultivars, and the ‘Turpentine’ land race were involved in the early cultivar selections. Pedigree results are in agreement with the findings of a larger diversity analysis study that the Florida types are more closely related to Indian than to Southeast Asian types and that the Florida group is not more diverse than the originating parental types. The Florida group is unique and some of the Florida cultivars have an unusual level of production stability and perform well across many different environments.
Technical Abstract: The Florida mango cultivars were historically described as hybrids between Indian types (monoembryonic) and Southeast Asian types (predominantly polyembryonic). Early molecular data including isozyme and Randomly Amplified Polymorphic DNA analysis supported the hybrid origin. The Florida varieties are distinctive and combine characteristics of both Indian and Southeast Asian types. Although adapted to Florida conditions they perform well across many different environments and several, including ‘Tommy Atkins’, ‘Keitt’, ‘Haden’, ‘Irwin’, and ‘Parvin’ are used for commercial production in many tropical and sub-tropical countries. Using 25 microsatellite markers we analyzed 63 Florida varieties as well as cultivars from India, Asia and other locations, to construct likely pedigrees for each Florida cultivar. Parentage analysis was performed across four generations based on introduction dates of accessions into Florida and selection dates for Florida varieties. The cultivars were sampled from the accessions maintained at the National Germplasm Repository and by Fairchild Tropical Botanic Garden (FTBG). Results suggest that as few as four Indian cultivars, and the ‘Turpentine’ land race were involved in the early cultivar selections. Sixty three of the 85 parents identified across the four generations were other Florida cultivars. Pedigree results are in accord with the findings of a larger diversity analysis study that the Florida types are more closely related to Indian than to Southeast Asian types and that the Florida group is not more diverse than either of the originating parental groups. The Florida group is unique and a subset of the Florida types have proven to have an unusual level of production stability and environmental adaptability.