Christoph Oberprieler The Systematics of Anthemis L. - Herbmedit.org

44 Oberprieler: Anthemis in N Africa
This seems to be the first count not only for this species but for Anthemis ser. Melampodina
e as a whole. It coincides with nearly all records for A. sect. Anthemis. All cells
checked proved to have a small accessory B-chromosome. The karyotype resembles that
of other species of the section, with 5 pairs of metacentric, 2 pairs of submetacentric, and 2
pairs of satellited subtelocentric chromosomes (Table 6). The intrachromosomal asymmetry
index AI yielded the highest value of all species studied here. A comparably high
value was found only in one population of A. confusa from S Tunisia.
Table 6. Chromosomes of Anthemis melampodina (OTU 12; n = 5).
Chromo- Long arm Short arm Totallength Relative length Arm ratio Chromosome
some pair (Ilm) (Ilm) (Ilm) (%)
type
4.20 3.57 7.77 13.9
Il 3.89 2.97 6.86 12.3
III 4.49 2.19 6.68 12.0
IV 4.86 0.96 6.60 11 .8
V 3.48 2.50 5.98 10.7
VI 3.32 2.41 5.73 10.3
VII 4.11 0.81 5.70 10.2
VIII 3.79 1.79 5.58 10.0
IX 2.98 1.94 4.92 8.8
1.17
1.30
2.05
5.06
1.39
1.37
5.07
2.11
1.53
m
m
sm
st-sat
m
m
st-sat
sm
m
Anthemis (subg. Anthemis, sect. Anthemis) ser. Secundirameae
Anthemis confusa
n=9
- Tn, Gafsa, Redeyef - Tamerza, 680 m, 9 May 1994, Vogt 12747 & Oberprieler 7052.
- Tn, Sidi-Bouzid, Jelma, 370 m, 17 May 1994, Vogt 13333 & Oberprieler 7638.
2n = 18
- Tn, Gafsa, Tozeur - El Oued, 45 m, 9 Apr 1980, Podlech 34145.
*-Tn, Tataouine - Ghomrassen, 340 m, 14 May 1994, Vogt 13131 & Oberprieler 7436.
2n = 20
*- Tn, Tataouine - Remada, 450 m, 13 May 1994, Vogt 13049 & Oberprieler 7354 (Fig. 4E).
This seems to be the first report of chromosome numbers for this species. The indications
of n = 9 and 2n = 18 agree with all previous reports for members of Anthemis ser.
Secundirameae. Plants from a population in S Tunisia were found to have an aneuploid
chromosome number of 2n = 20, but other plants from that area had the normal chromosome
set with 2n = 18 chromosomes (Table 7). As discussed in the taxonornic part of the
present work, Le Houérou (1962) considered plants from this area to be morphologically
intermediate between his A. pedunculata var. decumbens [= A. confusa] and the W Libyan
A. glareosa. However, in the present revision they are assigned to A. confusa not to
A. glareosa. The aneuploid chromosome number found in one of these plants may be due
to the past or recent interbreeding of the two cIosely related species in SE Tunisia.