Variation in the coat protein sequence of British isolates of Turnip yellow mosaic virus and comparison with previously published isolates

Abstract

Isolates of Turnip yellow mosaic virus (TYMV) were collected from wild cabbage (Brassica oleracea) on a 400 m stretch of Dorset coastline.

The coat protein genes of four isolates showed high homology in nucleotide sequence (0.970-1.000, mean 0.987). Lower levels of homology where found to previously published sequences of Australian isolates [10] (0.725-0.775, mean 0.741).

The amino acid composition of the Dorset isolates showed high levels of homology (0.964-1.000, mean 0.986). Numerous amino acid substitutions occurred between the Dorset and Australian isolates (0.705-0.819, mean 0.742).

Comparison with other isolates showed large genetic distances between the Dorset isolates and both European and Australian isolates.