GENETIC STUDIES FOR TURCICUM LEAF BLIGHT RESISTANCE IN SELECTED CROSSES IN MAIZE (Zea mays L.)

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dc.contributor.advisorDR. SANJEEV K. DESHPANDE
dc.contributor.authorNAVEEN KUMAR V
dc.date.accessioned2018-02-22T03:48:08Z
dc.date.available2018-02-22T03:48:08Z
dc.date.issued2014-12
dc.description.abstractThe present study was carried out to understand the genetics of turcicum leaf blight resistance in selected crosses in maize involving resistance and susceptible parents during kharif 2013. Six generations (P1, P2, F1, F2, B1 and B2) of all four crosses were evaluated and data on disease incidence was recorded. Generation mean analysis using six parameter model clearly indicated that there is predominance of additive gene action in the inheritance of turcicum leaf blight resistance in three crosses viz, BM36 x BM59, BM59 x BM258 and BM36 x BM1. Among interaction effects, additive x additive type of interaction predominantly controlled the disease resistance trait in crosses BM36 x BM59, BM59 x BM258 and BM36 x BM1 while in cross BM8 x RNBL4611 dominance gene action was found to be significantly affecting the trait. Considering the different resistance x susceptible cross combinations with respect to yield and yield parameters, dominance gene action was found to play a major role. Among the different cross combinations, the cross BM59 x BM258 was found to be significantly superior with respect to yield and yield parameters viz, cob legth, number of kernel rows per cob, hundred seed weight, cob weight and grain yield per plant. Further with respect to disease resistance the inbred lines BM8, BM59 and BM258 were found to be resistant to turcicum leaf blight. The cross combinations BM59 x BM258 and BM8 x RNBL4611 are found to be important in accumulation of favorable genes for disease resistance. So these crosses can be further utilised in resistance breeding against turcicum leaf blight in maize. Correlation and path analysis studies indicated that cob length, number of kernel rows per cob, 100-grain weight and cob weight had strong association and direct effects on yield.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810041202
dc.keywordsGENETIC STUDIES FOR TURCICUM LEAF BLIGHT RESISTANCE IN SELECTED CROSSES IN MAIZE (Zea mays L.)en_US
dc.language.isoenen_US
dc.pages150en_US
dc.publisherUniversity of Agricultural Sciences Dharwaden_US
dc.subGenetics and Plant Breedingen_US
dc.subjectnullen_US
dc.themeGENETIC STUDIES FOR TURCICUM LEAF BLIGHT RESISTANCE IN SELECTED CROSSES IN MAIZE (Zea mays L.)en_US
dc.these.typeM.Scen_US
dc.titleGENETIC STUDIES FOR TURCICUM LEAF BLIGHT RESISTANCE IN SELECTED CROSSES IN MAIZE (Zea mays L.)en_US
dc.typeThesisen_US
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