search
for
 About Bioline  All Journals  Testimonials  Membership  News  Donations


African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 13, No. 2, 2005, pp. 95-105
Bioline Code: cs05009
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 13, No. 2, 2005, pp. 95-105

 en Resistance to Late Blight and Yield of Population B3 Potato Selections in Uganda
Nakitandwe, J; Adipala, E; El-Bedewy, R; Wagoire, W & Lemaga, B

Abstract

Population B3 is the most advanced source of horizontal resistance available at the International Potato Centre (CIP). In this population, testing and selection for horizontal resistance to late blight, unlike those previously applied to population A clones, were simplified significantly (P<0.05) due to the absence of known R-genes. This study, conducted in southwestern and eastern Uganda, evaluated 20 selected potato genotypes in Population B3 for late blight resistance and tuber yield. Late blight severities on many of the Population B3 genotypes were lower than on most local cultivars, including the resistant cultivar, Rutuku. Population B3 genotypes performed better when sprayed with fungicide, Mancozeb, but the reduction in late blight severities due to spraying varied with genotype and location. Although spraying did not significantly (P>0.05) increase yields, almost all genotypes gave higher yields with than without spraying, with significant (P<0.05) differences among genotypes. Population B3 entries 389746.2, 383382.44, 393371.58, 392637.10, 391002.6, 393349.63, 393617.18, 391011.17, 391580.30, 393385.39, 393339.242, 393077.54, 393280.64 and 392657.8 performed well and could be considered for on-farm trials.

Keywords
Phytophthora infestans, resistance genes, Solanum tuberosum

 
© Copyright 2005 - African Crop Science Society

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2022, Site last up-dated on 10-Dec-2021.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Internet Data Center of Rede Nacional de Ensino e Pesquisa, RNP, Brazil