An analysis of interspecific hybrids and phylogenetic implications in Cucumis (Cucurbitaceae)

Singh, A K and Yadava, K S (1984) An analysis of interspecific hybrids and phylogenetic implications in Cucumis (Cucurbitaceae). Plant Systematics and Evolution, 147 (03). pp. 237-252. ISSN 0378-2697

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Investigations on interspecific crossability in 8Cucumis species (2n = 24) and chromosome pairing and pollen fertility of their hybrids from 15 combinations have been utilized for tracing the phylogenetic relationships among these taxa and factors responsible for their differentiation. A collective evaluation of data suggests that there are three broad groups of species, one of the spiny fruited interfertile species, whose hybrids show varying degree of chromosome associations and low to high pollen fertility; the second of species with non-spiny fruits, which are completely incompatible with the former but weakly compatible with the cultivated species,C. melo L. to produce partly developed seeds, and the third group ofC. metuliferusE. Mey. exSchrad. andC. melo and its different botanical varieties. The species with spiny fruits can be further divided based on karyomorphological similarities and/or on relative genomic affinity, indicated by chromosome pairing and hybrid pollen fertility.

Item Type: Article
Uncontrolled Keywords: Angiosperms, Cucurbitaceae, Cucumis, Interspecific crossability, chromosome pairing, pollen fertility, phylogenetic relationship, karyomorphology
Subjects: Others
Depositing User: Mr Ramesh K
Date Deposited: 14 Sep 2016 04:41
Last Modified: 27 Feb 2018 03:32
Official URL:
Funders: ICAR & CSIR
Acknowledgement: Authors express their deep sense of gratitude to Prof. H. C. ARVA for providing necessary facilities. One of us (K. S. Y.) is thankful to ICAR, and CSIR for providing financial assistance.
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