PNL Volume 21 1989 RESEARCH
REPORTS
75
A NEW GENE HETEROPHYLUS
(het) ON CHROMOSOME 7
Swiecicki, W. K.
Plant Breeding Station,
Wiatrowo
62100 Wagrowiec,
Poland
A
mutant, with changed morphology of the stipules was induced after seed treatment of line Wt 3527 by a
combined dose of 200 r NF + 0.014% NEU (1). The stipules are strongly reduced at
the base of stem, narrowed and opened at middle order nodes and different
in size at the top nodes (Fig. 1). The mutant line Wt 11291 was included
in the Wiatrowo pea gene bank in
1981.
Locus
identity tests were made with five other mutation cases of similar type
and type lines for stipules reduced (Wt 10232, st), stipulae asymetricae (Wt 11072, stia)
and stipula imminuata (Wt 11520, stim).
The F1 results showed that
the character described above in line Wt 11291 is controlled by a
locus different from any of the other genes in the comparison. For
these reasons the name heterophylus and the symbol het is
proposed.
In
linkage studies, the F2 population of cross Wt 11291 (het) x Wt
11744 (tl wsp r) was analyzed in the greenhouse in
1988. Undisturbed monohybrid
segregation was shown for het and tl with significant
deviations for wsp and r (Table 1A). The data in Table IB show
significant deviations from
independent assortment for gene pairs tl-r,
het-r and het-tl but no deviations for
gene pairs involving wsp. The recombination fractions (Table IB) suggest the following gene order:
1. Swiecicki, W.K. 1984. PNL
16:84-86.
Fig. 1. A new gene
het.