Table 1 Means and standard deviations (in parentheses) of fertility and fitness traits measured on S. eboracensis, S. vulgaris var. vulgaris and S. squalidus, and offspring of intertaxon crosses and backcrosses
From: Reproductive isolation of a new hybrid species, Senecio eboracensis Abbott & Lowe (Asteraceae)
Taxa | S. vulgaris var. vulgaris | S. eboracensis | F 1 | F 2 S. vulgaris | B 1 to S. eboracensis | B 1 to var. vulgaris | P | |
|---|---|---|---|---|---|---|---|---|
Character | ||||||||
N= | 33 | 40 | 18 | 72 | 21 | 20 | ||
Pollen fertility% | 97.6b (3.2) | 99.6a (0.5) | 97.0bc (3.4) | 94.5cd (7.5) | 92.1d (8.1) | 98.4ab (2.5) | *** | |
Seed set % | 82.4a (12.4) | 78.5ab (7.9) | 63.8bc (16.6) | 58.8c (26.5) | 66.1abc (36.6) | 67.2bc (18.2) | *** | |
N= | 19 | 11 | 10 | 40 | 18 | 10 | ||
Total lifetime production of capitula | 80.4 (26.4) | 102.2 (22.8) | 96.9 (35.7) | 87.6 (32.1) | 78.9 (30.1) | 78.8 (18.9) | ns | |
Taxa | S. squalidus | S. eboracensis | F 1 | F 2 | B1 to S. eboracensis | F3 | B1.2 to S. eboracensis | P |
Character | ||||||||
N= | 6 | 11 | 7 | 9 | 26 | 10 | 5 | |
Pollen fertility % | 94.5a (9.6) | 77.5ab (21.2) | 36.6 (10.2)c | 69.5ab (35.6) | 65.5b (15.9) | 55.4bc (35.1) | 69.1b (9.2) | *** |
Seed set % | 72.3a (31.1) | 74.3a (24.9) | 0.63 (10.8)c | 23.9b (10.4) | 55.4a (35.1) | 9.7bc (18.2) | 13.3b (9.8) | *** |
