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Resistance in maize to a third East African race of Puccinia polysora Underw
Author(s) -
STOREY H. H.,
HOWLAND AUDRIE K.
Publication year - 1967
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1967.tb04481.x
Subject(s) - biology , race (biology) , resistance (ecology) , botany , gene , genotype , agronomy , genetics
SUMMARY In 1961 a third race, EA. 3, of Puccinia polysora was recognized in Kenya. This was virulent to maize carrying either of the genes Rpp 1 or Rpp 2 , previously isolated. Resistance to EA. 3 was found in many Central American maizes; in two, Andaqui (Colombia) and Zapalote Chico (Mexico), genes Rpp 10 and Rpp 11 were recognized. Rpp 10 was fully dominant and its genotypes highly resistant to both EA. 1 and EA. 3. Rpp 11 was incompletely dominant, but determined effective resistance to both races when homozygous. Experimental crosses gave no evidence of linkage between the genes Rpp 1 , Rpp 10 and Rpp 11 .