Table 7.
Heterosis over mid parent values (%; ±SE) based on accession and interspecific hybrid means.
| Descriptors | S. insanum | S. anguivi | S. dasyphyllum | S. incanum | S. lichtensteinii | S. linnaeanum | S. tomentosum |
|---|---|---|---|---|---|---|---|
| n | 18 | 10 | 4/1a | 4 | 6 | 1 | 2 |
| Plant height (cm) | 16.7 ± 4.6 | 34.4 ± 7.1 | 90.5 ± 7.6 | 36.8 ± 11.3 | 38.1 ± 4.4 | 2.3 | 23.3 ± 4.2 |
| Stem diameter (mm) | 10.5 ± 4.3 | 10.4 ± 3.8 | 46.2 ± 12.3 | 29.1 ± 11.0 | 39.8 ± 10.3 | −18.7 | 23.8 ± 3.8 |
| Leaf prickles (upper surface) | 155.1 ± 34.5 | 260.0 ± 173.9 | 91.0 ± 5.4 | 733.3 ± 100.0 | 144.4 ± 92.9 | 100.0 | 800.0 ± 800.0 |
| Leaf pedicel length (cm) | 39.7 ± 6.5 | 22.5 ± 7.8 | −21.6 ± 1.2 | 19.5 ± 2.7 | 24.9 ± 9.2 | −13.3 | 56.3 ± 23.9 |
| Leaf blade length (cm) | 24.9 ± 4.1 | 22.2 ± 5.5 | 34.8 ± 5.7 | 47.6 ± 6.6 | 30.6 ± 6.3 | 3.9 | 22.8 ± 1.6 |
| Leaf blade width (cm) | 27.7 ± 4.5 | 38.2 ± 9.5 | 32.9 ± 5.0 | 67.7 ± 9.6 | 41.7 ± 8.5 | 7.1 | 22.4 ± 14.0 |
| Number of flowers per inflorescence | 70.1 ± 16.0 | 75.9 ± 16.3 | 36.9 ± 13.1 | 21.0 ± 9.4 | 42.7 ± 15.7 | −1.8 | 87.7 ± 35.5 |
| Corolla color | 15.9 ± 4.3 | −2.5 ± 4.6 | 18.9 ± 10.4 | 19.2 ± 3.0 | 16.2 ± 4.8 | 7.5 | −0.1 ± 8.6 |
| Number of petals | 1.3 ± 2.1 | −4.8 ± 1.6 | 1.9 ± 5.4 | −4.4 ± 2.4 | −2.2 ± 3.4 | −3.2 | −1.0 ± 1.0 |
| Fruit weight (g) | −5.5 ± 6.9 | −98.2 ± 0.3 | −60.4 | −86.6 ± 2.8 | −89.4 ± 1.5 | −89.9 | −98.6 ± 0.3 |
| Fruit calyx prickles | 32.9 ± 25.2 | −100.0 ± 0.0 | 80.0 | 27.1 ± 42.4 | 56.9 ± 27.6 | 80.0 | 29.1 ± 104.1 |
| Fruit shape index external I | 13.7 ± 3.5 | −16.7 ± 6.9 | −26.4 | −13.6 ± 0.8 | −15.0 ± 4.3 | −40.8 | −27.4 ± 8.0 |
Values are presented for traits of agronomic interest in the interspecific hybrids of eggplant with seven wild relatives (one from the primary genepool, S. incanum; and six from the secondary genepool).
a
For S. dasyphyllum data are available for four accessions for plant traits and only for one accession for fruit traits.