13 RESEARCH NOTES
TGC Report No. 28
1978
We did the allelism test on Montfavet 191, a sha-pat line (TGC 28:12). The fruits of the F1
hybrid were not parthenocarpic, so the pat allele is not responsible for parthenocarpy in
Severianin.
We studied the offspring of crosses Moneymaker x Severianin and Severianin x Apedice. The
results are given in the table below.
We can conclude from the data shown in the table that, in Severianin, parthenocarpy is
controlled by a recessive allele. We propose the symbol pat-2 for the locus of this allele.
The parthenocarpy in Severianin seems to us to be worth using in breeding programs. In
favourable environmental conditions female fertility in Severianin is quite normal (contrary to the
sha-pat lines we experimented with, (TGC 28:12) and pat-2 pollen has normal fertilizing power.
Philouze, J. Percentage of selfing in a
In France we are now exploiting on a large
female ps-2 line used for the production
scale, for the production of commercial of hybrid
seeds.
hybrid seeds, the male sterility of ms-35, the
locus of which is linked to the aa (anthocyanin
absent) locus (TGC 24:17). However, we found it of interest to check whether it was possible in
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