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University of Agricultural Sciences, Dharwad (2011)

Genetic and Breeding Investigation on Drought and Wilt in Chickpea (Cicer arietinum L.)

Shivakumar M.S.

Titre : Genetic and Breeding Investigation on Drought and Wilt in Chickpea (Cicer arietinum L.)

Auteur : Shivakumar M.S.

Université de soutenance : University of Agricultural Sciences, Dharwad

Grade : Master of Science in Genetics and Plant Breeding 2011

Résumé
Chickpea with very low productivity is constrained by biotic and abiotic factors like wilt and drought respectively. With objective of combining resistance to wilt, drought and productivity, investigation was carriedout in F2 population and F2 derived F3 families of cross between ICC 13124 and WR315 of chickpea. While ICC 13124 is tolerant to drought but susceptible to wilt, WR 315 is resistant to wilt and relatively less tolerant to drought. The F2 population and F2-3 families were evaluated to elicit information on nature and amount of variability generated with respect to yield and its components. Further the plant to progeny rows from F2-3 families were evaluated for wilt and drought. The F2 population was raised during rabi 2009-10. Randomly 575 plants were selected from F2 population to record observation. Comparison of mean, range and variance in early segregating generation revealed that the parents involved in construction of cross differ significantly. The F2-3 families were evaluated for yield components and screened for wilt and drought separately during rabi 2010-11. Screening for wilt was carried out in wilt sick plot ICRISAT, Hyderabad and evaluation for drought was carried out in UAS, Dharwad. From investigation, 48 F2-3 families were found to be promising with respect to drought while 17 families were found to be promising with respect to wilt thus indicating the possibility of widening the germplasm resource for drought and wilt. About 27 families were superior with drought tolerance and yield. While 9 families were found to be better with respect to drought tolerance and wilt resistant. However, two families showed desired wilt resistant, drought tolerance and high yield. These families can be advanced to further generation to stabilize the families. Best families can be identified for release as variety or as germplasm line for breeding wilt and drought resistance in combination.

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