NDLI: Field performance of subterranean clover germplasm in relation to severity of Cercospora disease

Content Provider	Springer Nature Link
Author	Barbe, M. J. Nichols, P. G. H.
Copyright Year	2005
Abstract	Ninety six genotypes, including 14 cultivars, of Trifolium subterraneum var. subterraneum and var. yanninicum were screened in the field for resistance to Cercospora (Cercospora zebrina). Seven genotypes, 84S43-13, 84S43-15, EP132Sub-E, 84Y32-59, 83Y83-23, 84Y32-42 and 83Y79-20, were totally resistant to Cercospora disease. A further 26 genotypes, including the cvv. Meteora and Napier, had an incidence of Cercospora of <1 (0–10 scale) and no consequent leaf collapse from the disease (score 0; 0-10 scale), while 15 genotypes had incidence scores between 1 and 2 without any leaf collapse evident. There was excellent overall correlation between Cercospora incidence and leaf collapse across the genotypes tested, with both strong quadratic (y = -0.17x $^{2}$ + 2.50x + 1.33; R $^{2}$ =0.89) and linear (y = 0.96x+ 1.63; R $^{2}$ =0.82) components to this relationship. There was circumstantial evidence of ecogeographical differences for Cercospora resistance among ecotypes collected from different regions. Of eight overseas introductions with Cercospora incidence scores of <2 and a Cercospora leaf collapse score of 0, six were from Sardinia and one each were from Portugal and Greece. In contrast, all seven Sicilian ecotypes had Cercospora incidence scores of 7.75 or greater. The high degree of resistance observed in many of the genotypes to Cercospora highlights the existence of many exce llent sources of resistance that could be exploited in breeding and development programmes to minimise production losses in Australian subterranean clover pastures.
Starting Page	197
Ending Page	201
Page Count	5
File Format	PDF
ISSN	08153191
Journal	Australasian Plant Pathology
Volume Number	34
Issue Number	2
e-ISSN	14486032
Language	English
Publisher	Springer Netherlands
Publisher Date	2005-01-01
Publisher Institution	Australasian Plant Pathology Society
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Pathology Plant Sciences Agriculture Entomology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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