Stamova, L., and M. Yordanov Genetic study
In progenies of the cross Bison x L.
of the genes for resistance to Clado-
cheesmanii (pimpinellifolium form Galapagos-
sporium fulvum derived from L.
29) obtained by A. Ognyanova, the lines 107
cheesmanii.
and 112, homozygous resistant to races of the
C group of Cladosporium fulvum, were
selected. The investigations showed that the complete resistance of these lines is controlled by
single dominant genes.
The data from the allelic test carried out with these two lines, PI 187002 (gene Cf-5), the
Dutch accessions of L. cheesmanii (63280 and 64316) and the line 4 from the cross with L. chilense
showed that in the progenies of the above mentioned cross were found two genes for complete
resistance to races of group C of Cladosporium fulvum. The gene from line 107 is allelic to Cf-5
and non-allelic to factors controlling resistance in the Dutch accessions. The gene from line 112
is non-allelic to the gene Cf-5. The genes from the lines 107 and 112 are non-allelic to the gene in
line 4, derived from L. chilense.
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