GENETIC STUDY OF BACTERIAL BLIGHT RESISTANCE IN COTTON (Gossypium hirsutam L.)

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dc.contributor.authorALABI, SAMUEL OLUSEGUN
dc.date.accessioned2014-07-07T08:35:00Z
dc.date.available2014-07-07T08:35:00Z
dc.date.issued1994-11
dc.descriptionA thesis submitted to the Postgraduate School, Ahmadu Bello University, in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Breeding. DEPARTMENT OF PLANT SCIENCE FACULTY OF AGRICULTURE AHMADU BELLO UNIVERSITY ZARIA, NIGERIA. NOVEMBER, 1994.en_US
dc.description.abstractThe study was carried out to investigate the nature and mode of inheritance of bacterial blight resistance in cotton; to examine environmental variation, if any, for resistance to bacterial blight and the relationship between resistance at the cotyledon stage with that at the true-leaf stage. The variety S295 was crossed with seven other varieties: TX-CDP37HH-1-83, TAMCOT SP21S, TAMCOT-CAMD-E; SAMCOT-9, SAMCOT-10, SAMCOT-6 and SAMCOT- 8. The parents and their crosses were wound-inoculated in the field at three locations and in the screenhouse with separate bacterial suspensions of isolates 1, 2 and a 1:1 mixture of isolates 1 and 2. Disease reaction was evaluated on a scale of 1-10. Disease grades frequency , distributions indicated a single gene with complete dominance for resistance to the two isolates. The analysis of variance indicated highly significant differences among populations and locations. The interaction between populations x locations was also significant. The significance of the interactions between isolates x locations and populations x isolates x locations, indicated that for future screening and testing, materials should be evaluated across several environments and with different isolates. The-' correlation between cotyledon and true-leaf disease grades and phenotypic ratios indicated that resistance was controlled by the same genetic mechanism at both plant stagesen_US
dc.identifier.urihttp://hdl.handle.net/123456789/5066
dc.language.isoenen_US
dc.subjectGENETIC,en_US
dc.subjectBACTERIAL,en_US
dc.subjectRESISTANCE,en_US
dc.subjectCOTTON,en_US
dc.subject(Gossypium hirsutam L.)en_US
dc.titleGENETIC STUDY OF BACTERIAL BLIGHT RESISTANCE IN COTTON (Gossypium hirsutam L.)en_US
dc.typeThesisen_US
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