A Database for Triticeae and Avena
Based on six crosses (Jensen, 1990), it was shown that the powdery
mildew resistance locus Ml-pis not located on chromosome 5. It was also indicated that no support exists for powdery mildew resistance locus ml-d is located on chromosome 5.
Therefore, in addition to locus Ml-p, which was previously removed
from the linkage map of chromosome 5 (BGN 17), the ml-d locus has now also
been removed. The recombination frequencies between marker loci
supporting the above conclusion, and some additional ones reported by
Jensen (1990) are shown in Table 1. The additional recommendation
estimates are utilized to improve the chromosome 5 linkage map (Fig. 1)
using the procedure described by Jensen and Jørgensen (1975).
Jensen, J. 1990. Are powdery mildew loci MI-p and ml-d on barley
chromosome 5? BGN 19:27-32.
Jensen, J., and J. H. Jørgensen. 1975. The barley chromosome 5 linkage
map. I. Literature survey and map estimation procedure. Hereditas 80:5-16.