Asian Journal of Bio Science

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Identification of Potential Sources of Resistance for Wilt Caused by Fusarium oxysporum f.sp. Ricini in Castor (Ricinus communis L.)


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1 Regional Agricultural Research Station, (Pr. JTSAU), Palem, Mahabubnagar (Telangana), India
     

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An experiment was carried out in wilt sick plot of Regional Agricultural Research Station, Palem to screen diverse germplasm accessions for evaluation of resistance to Fusarium wilt, a devastating disease in castor caused by Fusarium oxysporum f.p. ricini with an objective to identify new potential sources of wilt resistance. Observations were recorded as per cent disease infection in each entry periodically at thirty days interval upto 150 days after sowing. 'Kranthi' and 'Haritha' varieties were used as susceptible and resistant checks, respectively sown after every five test entries. Out of two hundred germplasm accessions screened, twenty nine accessions were found to be Fusarium wilt resistant with less than 20 per cent wilt incidence. Fifty accessions were screened for confirmation of wilt resistance out of which twelve accessions revealed resistant reaction. Further forty advanced lines were screened among which nineteen entries were found to be resistant. The identified resistant cultures serve as potential sources for developing diverse wilt resistant varieties/hybrids in castor.

Keywords

Castor, Fusarium Wilt, Sick Plot, Germplasm Screening.
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  • Identification of Potential Sources of Resistance for Wilt Caused by Fusarium oxysporum f.sp. Ricini in Castor (Ricinus communis L.)

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Authors

P. Bindu Priya
Regional Agricultural Research Station, (Pr. JTSAU), Palem, Mahabubnagar (Telangana), India
M. V. Nagesh Kumar
Regional Agricultural Research Station, (Pr. JTSAU), Palem, Mahabubnagar (Telangana), India
V. Gouri Shankar
Regional Agricultural Research Station, (Pr. JTSAU), Palem, Mahabubnagar (Telangana), India

Abstract


An experiment was carried out in wilt sick plot of Regional Agricultural Research Station, Palem to screen diverse germplasm accessions for evaluation of resistance to Fusarium wilt, a devastating disease in castor caused by Fusarium oxysporum f.p. ricini with an objective to identify new potential sources of wilt resistance. Observations were recorded as per cent disease infection in each entry periodically at thirty days interval upto 150 days after sowing. 'Kranthi' and 'Haritha' varieties were used as susceptible and resistant checks, respectively sown after every five test entries. Out of two hundred germplasm accessions screened, twenty nine accessions were found to be Fusarium wilt resistant with less than 20 per cent wilt incidence. Fifty accessions were screened for confirmation of wilt resistance out of which twelve accessions revealed resistant reaction. Further forty advanced lines were screened among which nineteen entries were found to be resistant. The identified resistant cultures serve as potential sources for developing diverse wilt resistant varieties/hybrids in castor.

Keywords


Castor, Fusarium Wilt, Sick Plot, Germplasm Screening.

References