A Database for Triticeae and Avena
II.28. The influence of barley stripe mosaic virus on the frequency
of triploids and aneuploids in barley.
Jens Sandfaer. Agricultural Research Department, Danish Atomic Energy
Commission, Research Establishment Risø, DK-4000 Roskilde, Denmark.
In a previous investigation it was found that the frequency of triploids
in the two-rowed, diploid, spring barley varieties Tystofte Prentice and
Svalöf Freja was 2.3 and 0.04 per cent, respectively (Hereditas 64:131-134,
1970) The material used from T. Prentice was found to have a high infection
rate of barley stripe mosaic virus (BSMV), and in the material from S.
Freja a low infection rate was found. The difference between the two varieties
in frequency of triploids might be due to the difference in infection rate
To test the occurrence of triploids and aneuploids further, ten varieties
were inoculated with BSMV and the frequency of triploids and aneuploids
was determined in the progeny from these virus-infected plants as well
as in the progeny from non-inoculated virus-free plants. The results of
some of the varieties are given in Table 1.
In virus-free material, a few triploids were found in most of the varieties
but the frequency was very low. However, our preliminary data indicate
a significant variation between varieties. BSMV infected material had in
all varieties a very considerable increase in the frequency of triploids
and aneuploids. There was a significant variation in frequencies between
varieties. The most frequent groups of aneuploids were 2n=2x + 1= 15 and
2n=3x + 1= 22.
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