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Title: Diverse genetic bases of Indian polyembryonic and monoembryonic mango (Mangifera indica L) cultivars
Authors: Ravishankar, K V
Chandrashekara, P
Sreedhara, S A
Dinesh, M R
Lalitha, Anand
Sai Prasad, G V S
Keywords: Mango
Issue Date: 2004
Publisher: Current Science
Citation: Diverse genetic bases of Indian polyembryonic and monoembryonic mango (Mangifera indica L) cultivars. Curr. Sci (87):7, 870-01
Abstract: Mango is one of the most important fruit crops in India. It is known to have been cultivated in India since the last 4000 years. Almost all cultivars belong to the species Mangifiera indica, family Anacardiaceae. M. indica is native to India and occurs abundantly in forests and cultivated areas. Hence, it is difficult to differentiate true wild forms from cultivated ones. The commercially grown cultivars have arisen through seedling selections made for different fruit characters like colour, taste, flavour, size, etc. Later, these cultivars have been vegetatively propagated and cultivated in a wide area. Mango cultivars are classified into two groups: monoembryonic type or Indian type and polyembryonic type or Indo-Chinese type. In India, majority of the cultivated types are monoembryonic. Surprisingly, polyembryonic types were grown only in southern India, especially in coastal parts of Kerala, Karnataka and Goa. Emergence of multiple seedlings from a single seed is referred to as polyembryony. Keeping this in view, the present study was carried out to examine whether these two classes have a common or different genetic base using Random Amplified Polymorphic DNA (RAPD) and chloroplast DNA Restriction Fragment Length Polymorphism (RFLP) analysis. In this study, ten polyembryonic and monoembryonic cultivars each traditionally grown in the west coast of southern India were used to determine the genetic relatedness among them using RAPD markers. In both the analyses, the grouping of cultivars based on their embryo types indicated that monoembryonic and polyembryonic types of Indian mango cultivars have a different genetic base. These results suggest that the polyembryonic types might have beenintroduced from other parts of Southeast Asia and are unlikely to have originated from India.
URI: http://hdl.handle.net/123456789/245
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