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Table 1 Meiotic analysis and pollen stainability of entities belonging to different Subseries of Senecio sect. Senecio

From: Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae)

Species 2n Meiotic configuration Chiasmata/cell Interstitial ch. Pollen stainability
x ¯ ± sd M x ¯ ± sd M
Subserie Brasiliensis (Cabrera) Cabrera et S.E. Freire
S. brasiliensis var. tripartitus** (4, 28) 40 20 II (92.8%) 27.5 ± 2.4 30 4.2 ± 2.3 4 96.1 - 99.4%
19 II + 2 I (3.6%) (z1 = −1.04)   (z2 = 4.99)++
18 II + 4 I (3.6%)    (0–9)
S. eruciformis var. brachycephalus** (2, 70) 40 20 II (87.1%) 24.9 ± 3.5 24 3.0 ± 2.2 2 98.4 - 99.6%
19 II + 2 I (10%) (z1 = −2.19)++   (z2 = 5.37)++
17 II + 1 IV + 2 I (1.45%)    (0–9)
18 II + 1 III + 1 I (1.45%)
S. eruciformis var. eruciformis** (2, 60) 40 20 II (91.7%) 26.1 ± 2.8 29 2.6 ± 2.6 1 97.4 - 98.3%
19 II + 2 I (8.3%) (z1 = −1.63)   (z2 = 5.49)++
(0–12)
S. ganganensis** (1, 45) 40 20 II (93.3%) 29.5 ± 2.0 30 3.3 ± 2.1 4 98.90%
18 II + 4 I (4.5%) (z1 = −0.11)   (z2 = 5.28)++
19 II + 2 I (2.2%)    (0–9)
S. gilliesianus (4, 54) 40 20 II (94.45%) 31.7 ± 3.2 33 8.8 ± 2.1 10 92.1 - 98.8%
19 II + 2 I (1.85%) (z1 = 0.81)   (z2 = 3.52)++
18 II + 1 IV (1.85%)    (2–17)
16 II + 2 IV (1.85%)
S. glaber** (1, 17) 40 20 II (100%) 32.0 ± 2.2 31 6.7 ± 4.2 3 83.40%
  (z1 = 0.89)   (z2 = 4.20)++
(1–14)
S. goldsackii** (3, 79) 40 20 II (94.9%) 30.9 ± 2.4 31 9.2 ± 3.6 8 96.7 - 99.5%
18 II + 1 IV (3.8%) (z1 = 0.42)   (z2 = 3.40)++
19 II + 2 I (1.3%)    (2–19)
S. melanopotamicus** (6, 76) 40 + 0-1B 20 II (98.7%) 33.5 ± 2.1 33 8.2 ± 3.5 10 93.7 - 99.6%
18 II + 1 IV (1.3%) (z1 = −1.56)   (z2 = 3.74)++
(0–16)
S. microphyllus** (2, 10) 80 + 0-6B 40 II (60%) 47.2 ± 5.8 46 4.6 ± 3.3 2 98.5 - 99.5%
38 II + 1 IV (30%) (z1 = −3.64)++   (z2 = 4.86)++
36 II + 2 IV (10%)    (1–9)
S. pampeanus (3, 24) 40 + 0-1B 20 II (75%) 27.0 ± 2.6 27 2.5 ± 2.1 1 98.3 - 98.7%
19 II + 2 I (16.7%) (z1 = −0.99)   (z2 = 5.55)++
17 II + 6 I (4.15%)    (0–7)
18 II + 1 IV (4.15%)
S. pinnatus (4, 36) 80 + 0-10B 40 II (36.1%) 59.7 ± 3.6 60 10.4 ± 4.2 11 98.8 - 99.6%
38 II + 1 IV (22.2%) (z1 = −0.06)   (z2 = 6.62)++
36 II + 2 IV (19.4%)    (3–20)
32 II + 4 IV (8.3%)
34 II + 3 IV (5.5%)
38 II + 1 III + 1 I (5.5%)
32 II + 3 IV + 4 I (3%)
S. ragonesei* (3, 87) 40 20 II (96.6%) 30.4 ± 1.6 30 4.9 ± 2.1 5 81.6 - 98.6%
19 II + 2 I (3.4%) (z1 = 0.23)   (z2 = 4.76)++
(1–10)
S. riojanus ** (1, 1) 40 without data      99.40%
S. rudbeckiifolius (7, 98) 40 + 0-6B 20 II (85.8%) 28.8 ± 2.5 30 4.6 ± 2.4 4 98.2 -98.7%
18 II + 1 IV (7.1%) (z1 = −0.48)   (z2 = 4.88)++
16 II + 2 IV (3.1%)    (0–13)
19 II + 2 I (2%)    
18 II + 4 I (1%)
15 II + 1 IV + 1 VI (1%)
S. subulatus var. erectus** (1, 4) (6,43) 40 20 II (100%) 24.5 ± 3.0 27 1.2 ± 1.5 0 71.50%
(z1 = −2.46)++   (z2 = 5.93)++
(0–3)
80 + 0-9B 38 II + 1 IV (34.9%) 54.4 ± 6.6 55 5.3 ± 3.7 3 90 - 95%
40 II (27.8%) (z1 = −1.57)   (z2 = 7.75)++
36 II + 2 IV (12%)    (1–14)
34 II + 3 IV (4.6%)    
30 II + 5 IV (4.6%)
37 II + 1 IV + 2 I (2.3%)
39 II + 2 I (2.3%)
38 II + 4 I (2.3%)
35 II + 1 VI + 1 IV (2.3%)
35 II + 1 IV + 2 III (2.3%)
35 II + 2 IV + 2 I (2.3%)
32 II + 4 IV(2.3%)
S. subulatus var. salsus** (1, 10) 80 34 II + 3 IV (50%) 62.0 ± 4.8 54 11.5 ± 3.6 16 98.50%
36 II + 2 IV (30%) (z1 = 0.76)   (z2 = 6.36)++
32 II + 4 IV (20%)    (7–16)
S. subulatus var. subulatus* (4, 81) (3,16) 40 + 0-1B 20 II (95.1%) 21.1 ± 4.1 25 3.4 ± 2.8 1 90 - 99.3%
19 II + 2 I (3.7%) (z1 = −1.25)   (z2 = 5.23)++
18 II + 1 IV (1.2%)    (0–13)
80 38 II + 1 IV (25%) 55.9 ± 3.2 58 7.3 ± 4.5 5 90 - 99.4%
34 II + 3 IV (25%) (z1 = −1.01)   (z2 = 7.30)++
36 II + 2 IV (18.75%)    (1–20)
40 II (6.25%)
32 II + 4 IV (6.25%)
39 II + 2 I (6.25%)
37 II + 1 IV + 2 I (6.25%)
32 II + 3 IV + 4 I (6.25%)
S. uspallatensis (13, 123) 80 + 0-5B 40 II (34.1%) 52.7 ± 5.8 52 7.6 ± 4.8 5 72.9 - 99.9%
38 II + 1 IV (21.95%) (z1 = −2.21)++   (z2 = 7.23)++
36 II + 2 IV (20.32%)    (0–21)
34 II + 3 IV (4.95%)
39 II + 2 I (3.25%)
37 II + 1 IV + 2 I (3.25%)
34 II + 2 IV + 1 III + 1 I (1.63%)
35 II + 2 IV + 2 I (1.63%)
32 II + 4 IV (1.63%)
38 II + 4 I (0.81%)
36 II + 1 IV + 4 I (0.81%)
33 II + 3 IV + 2 I (0.81%)
33 II + 2 IV + 2 III (0.81%)
33 II + 1 VI + 2 IV (0.81%)
32 II + 3 IV + 4 I (0.81%)
31 II + 1 X + 2 IV (0.81%)
31 II + 1VI + 2 IV + 1 III + 1 I (0.81%)
30 II + 5 IV (0.81%)
Serie Sandwithiani (Cabrera) Cabrera et S.E.Freire
S. viridis var. radiatus* (8, 143) 40 + 0-1B 20 II (94.4%) 31.4 ± 3.0 32 5.6 ± 3.0 6 94.1 - 99.7%
18 II + 1 IV (3.5%) (z1 = 0.68)   (z2 = 4.56)++
19 II + 2 I (2.1%)    (0–13)
S. viridis var. viridis** (1, 19) 80 + 0-2B 34 II + 3 IV (21.1%) 58.7 ± 2.2 61 13.7 ± 3.9 12 98.90%
32 II + 4 IV (21%) (z1 = 0.08)   (z2 = 5.88)++
40 II (10.4%)    (8–21)
38 II + 1 IV (10.4%)
39 II + 2 I (5.3%)
36 II + 2 IV (5.3%)
36 II + 1 IV + 1 III + 1 I (5.3%)
30 II + 5 IV (5.3%)
30 II + 4 IV + 1 III + 1 I (5.3%)
28 II + 5 IV + 1 III + 1 I (5.3%)
24 II + 7 IV + 1 III + 1 I (5.3%)
Serie Simplices (Cabrera) Cabrera et S.E.Freire
S. grisebachii var. grisebachii (1, 9) 40 20 II (100%) 27.9 ± 2.6 28 6.0 ± 2.3 7 91.50%
(z1 = −0.94)   (z2 = 4.43)++
(2–9)
S. grisebachii var. leptotus** (5, 57) 40 + 0-2B 20 II (98.2%) 24.8 ± 3.1 21 3.7 ± 2.2 4 97.8 - 99.8%
19 II + 2 I (1.8%) (z1 = −2.31)++   (z2 = 5.15)++
(0–10)
S. grisebachii var. schizotus** (3,37) 40 20 II (75.7%) 24.1 ± 2.6 24 4.2 ± 2.3 4 97.5 - 99.5%
19 II + 2 I (10.8%) (z1 = −2.36)++   (z2 = 5.01)++
18 II + 1 IV (8.1%)    (0–9)
18 II + 4 I (5.4%)
S. hieronymi (5, 90) 40 + 0-7B 20 II (90%) 28.4 ± 2.9 29 3.8 ± 2.0 3 98.60%
19 II + 2 I (6.7%) (z1 = −0.64)   (z2 = 5.12) ++
18 II + 1 IV (3.3%)    (0–9)
S. linariifolius var. subtomentosus** (1, 46) 40 20 II (87%) 28.0 ± 2.6 28 3.2 ± 2.3 5 without data
19 II + 2 I (8.7%) (z1 = −0.82)   (z2 = 5.32)++
18 II + 1 III + 1 I (2.15%)    (0–9)
18 II + 1 IV (2.15%)
S. octolepis var. saltensis* (2, 41) 40 20 II (92.7%) 25.1 ± 3.0 24 4.8 ± 2.0 6 94.4 - 99.1%
16 II + 2 IV (4.9%) (z1 = −2.16)++   (z2 = 4.82)++
18 II + 1 IV (2.4%)    (1–10)
Serie Viscosi (Baker) Cabrera et S.E.Freire
S. crepidifolius* (1, 17) 40 20 II (88.2%) 25.8 ± 2.8 26 4.2 ± 2.2 2 without data
19 II + 2 I (5.9%) (z1 = −1.73)   (z2 = 4.98)++
   18 II + 4 I (5.9%)    (1–9)   
  1. In the first column. numbers in parentheses indicate the number of individuals and cells. respectively. analyzed in each taxon. Chromosome number (2n); meiotic configurations and corresponding percentage. Media ( x ¯ ). standard deviation (sd) and mode (M) of total chiasmata per cell and interstitial chiasmata (interstitical ch.). range of instestitial chiasmata in parentheses. both statistics values z1 and z2 and percentage of pollen stainability are shown.
  2. *chromosome record already published by the authors.
  3. **new chromosome record.
  4. ++significant values (p < 0.05).
  5. z1: proportion of open bivalents. z2: proportion of interstitial chiasmata.