A linkage map of diploid Avena based on RFLP loci and a locus conferring resistance to nine isolates of Puccinia coronata var. 'avenae'

An F2 oat population was produced by crossing the diploid (n=7) species Avena strigosa (CI 3815) with Avena wiestii (CI 1994), resistant and susceptible, respectively, to 40 isolates of Puccinia coronata, the causal agent of crown rust. 88 F2 individuals were used to construct an RFLP linkage map re...

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Bibliographic Details
Published in:Theoretical and applied genetics 1994-12, Vol.89 (7-8), p.831-837
Main Authors: Rayapati, P.J, Gregory, J.W, Lee, M, Wise, R.P. (Iowa State Univ., Ames (USA). Dept. of Agronomy)
Format: Article
Language:English
Subjects:
ADN
AVENA
Avena strigosa
Avena wiestii
Biological and medical sciences
CARTE GENETIQUE
Classical genetics, quantitative genetics, hybrids
Disease resistance
ENZIMA DE RESTRICCION
ENZYME DE RESTRICTION
Fundamental and applied biological sciences. Psychology
GENE
GENES
Genetics of eukaryotes. Biological and molecular evolution
linkage map
LOCI
LOCUS
MAPAS GENETICOS
Monocots
Pflanzenzuechtung
POLIMORFISMO GENETICO
POLYMORPHISME GENETIQUE
Pteridophyta, spermatophyta
PUCCINIA CORONATA
RESISTANCE AUX MALADIES
RESISTENCIA A LA ENFERMEDAD
RFLP
SECUENCIA NUCLEICA
SEQUENCE NUCLEIQUE
Vegetals
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Summary:An F2 oat population was produced by crossing the diploid (n=7) species Avena strigosa (CI 3815) with Avena wiestii (CI 1994), resistant and susceptible, respectively, to 40 isolates of Puccinia coronata, the causal agent of crown rust. 88 F2 individuals were used to construct an RFLP linkage map representing the A genome of cultivated hexaploid oat. 208 RFLP loci have been placed into 10 linkage groups. This map covers 2416 cM, with an average of 12 cM between RFLP loci. 88 F3 lines, derived from F2 individuals used to construct the map, were screened for resistance to 9 isolates of P. coronata. One locus, Pca, was found to confer a dominant resistance phenotype to isolates 203, 258, 263, 264B, 290, 298, 325A, and 345. Pca also conferred resistance to isolate 276; however, an unlinked second gene may also be involved.
ISSN:0040-5752
1432-2242
DOI:10.1007/BF00224505