Combining behaviour of exotic x local wheats for durable resistance to stripe rust.

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dc.contributor.advisorDey, Tuhina
dc.contributor.authorJangir, Laxmi
dc.date.accessioned2021-02-11T05:02:06Z
dc.date.available2021-02-11T05:02:06Z
dc.date.issued2021-02
dc.description.abstractStripe rust is an important biotic stress effecting wheat and the development of varieties with durable resistance is a viable alternative. The present investigation entitled “Combining behaviour of exotic x local wheats for durable resistance to stripe rust” targeted the development of F1s involving eight resistant lines obtained from a diverse exotic core germplasm collection and three adapted varieties in line x tester design. A set as thirty-five genotypes including eleven parents and twenty-four F1s were evaluated in randomized block design during Rabi 2019. Observations on yield related traits viz., number of tillers per plant, flag leaf area, spike length, number of spikelets per spike, chlorophyll content of flag leaf, 1000 grain weight and grain yield per plant and stripe rust score as per Modified Cobb Scale was recorded on five randomly selected plants. Analysis of variance revealed that mean sum of square due to genotypes, parents, parents vs hybrid were highly significant for all the traits indicating the existence of sufficient genetic variability in the material under study. GCA effects of parents revealed that the genotype SUNLINE with highly significant gca effect in desired direction for spike length, chlorophyll content of flag leaf, 1000 grain weight and grain yield per plant. The other parents that showed significant positive GCA effect for grain yield per plant were SUNTOP, DANPHE, HAR-421, RSP 561 and WB-2. The cross BOTH X RSP-561, MAJENTA X WB-2 and ENKOY X JAUW-584 showed significant sca effect with disease score of 20MS, 10MR and 20S, respectively and positive but non-significant heterobeltiosis. Four F1s showed significant positive heterobeltiosis for grain yield per plant viz., SUNTOP X JAUW-584, SUNLINE X JAUW-584, DANPHE X JAUW-584 and HAR-421 X JAUW-584. MAJENTA X WB-2 with significant positive sca effect for yield and component traits along with 10MR stripe rust score and positive heterobeltiosis may lead to potential APR breeding lines. The presence of non-additive gene action governing all traits indicates that selection of superior individual plants should be delayed till F4 or F5 generations.en_US
dc.identifier.citationPreferred for your work. Jangir, L. 2021. Combining behavior of exotic x local wheats for durable resistance to stripe rust. M.Sc. thesis, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, India.en_US
dc.identifier.other36626
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810161147
dc.keywordsWheat, Stripe Rust, Gca, Scaen_US
dc.language.isoEnglishen_US
dc.pages48en_US
dc.publisherSher-e-Kashmir University of Agricultural Sciences and Technology Jammu, J&Ken_US
dc.subPlant Breedingen_US
dc.themeCombining behaviour of exotic x local wheats for durable resistance to stripe rust.en_US
dc.these.typeM.Scen_US
dc.titleCombining behaviour of exotic x local wheats for durable resistance to stripe rust.en_US
dc.typeThesisen_US
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