Genetic and Cytogenetic Studies in some Species of the Genus Crotalaria Linn.

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dc.contributor.authorAkpabio, Kingsley Essien
dc.contributor.otherOlorode, Omotoye
dc.date.accessioned2014-05-07T12:43:36Z
dc.date.accessioned2018-10-29T11:06:35Z
dc.date.available2014-05-07T12:43:36Z
dc.date.available2018-10-29T11:06:35Z
dc.date.issued1986
dc.degree.awardPh.D. Botanyen_US
dc.departmentBotanyen_US
dc.description.abstractA collection of the dominant species of Crotalaria was made from different parts of Nigeria. Eight species in all were assembled. These collections were subjected to morphological, cytological and biochemical characterizations. Intra specific and inter specific hybridizations were attempted. Considerable overlap in their vegetative and floral attributes was observed. Statistical analysis of the morphological data has shown that vegetative and frutescence features of Crotalaria plants are important in sub generic and species delimitations. This analysis also shows that qualitative and quantitative characters of flowers, fruits and seeds are important in the identification of Crotalaria species. Observations on the karyotypes and meiotic behaviour of the eight species indicate that six of the species - C. retusa, C. goreensis, C. spectabilis, C. cylindrocarpa C. calycina and C. comosa have somatic complements of sixteen chromosomes (2n=16) each, while two--C.doniana and C.naragutensis--have two accessory chromosomes in addition. The low occurrence of multivalent associations in the diakinesis of each species indicates that the homologues within each genome are considerably distinct structurally. Occurrence of giant cells with large coalesced elements suspected to represent gene amplification is also observed in three species - C. retusa, C. goreensis, and C. cylindrocarpa. Attempt is made to speculate on the evolutionary relationships among the species studied.en_US
dc.facultiesScienceen_US
dc.format.filetypePDFen_US
dc.identifier.citationAPAen_US
dc.identifier.urihttp://localhost:8080/xmlui/handle/123456789/3426
dc.language.isoenen_US
dc.pages.totalpages136pen_US
dc.publisherObafemi Awolowo Universityen_US
dc.subjectCrotalaria plantsen_US
dc.subjectgeneticsen_US
dc.subjectcytogeneticsen_US
dc.titleGenetic and Cytogenetic Studies in some Species of the Genus Crotalaria Linn.en_US
dc.typeThesisen_US
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