TABLE 1.
Pollen tube growth following compatible and incompatible pollinations of Solanum lycopersicoides and interspecific Solanum hybrids
| Pistil genotype | Pollen genotype | Length of longest tube (% of style) | Location of rejection | No. tubes in ovaries |
|---|---|---|---|---|
| S. lycopersicoides LA2951 | S. lycopersicoides LA2951 (self) | 50.2 ± 2.76 | Style | 0 |
| S. lycopersicoides LA2951 (sib) | 100 | N/A | >50 | |
| S. pennellii LA0716 | 100 | N/A | 4.9 ± 2.91 | |
| S. lycopersicum cv. VF-36 | 5.6 ± 1.88 | Stigma | 0 | |
| S. lycopersicum (ui1.1) | 5.3 ± 0.67 | Stigma | 0 | |
| S. lycopersicum (ui6.1) | 4.7 ± 1.52 | Stigma | 0 | |
| S. lycopersicum (ui1.1 + ui6.1) | 10.9 ± 0.96 | Stigma/style | 0 | |
| S. lycopersicum × S. lycopersicoides (diploid hybrid 90L4178) | S. lycopersicoides LA2951 | 100 | N/A | >50 |
| S. pennellii LA0716 | 100 | N/A | >50 | |
| S. lycopersicum cv. VF-36 | 16.6 ± 1.86 | Style | 0 | |
| S. lycopersicum (ui1.1) | 13.7 ± 0.71 | Style | 0 | |
| S. lycopersicum (ui6.1) | 15.3 ± 3.14 | Style | 0 | |
| S. lycopersicum (ui1.1 + ui6.1) | 42.3 ± 14.5 | Style | 0 | |
| S. lycopersicum × S. lycopersicoides (allotriploid hybrid GH266) | S. lycopersicoides LA2951 | 100 | N/A | >50 |
| S. pennellii LA0716 | 100 | N/A | >50 | |
| S. lycopersicum cv. VF-36 | 47.8 ± 4.93 | Style | 0 | |
| S. lycopersicum (ui1.1) | 45.9 ± 6.40 | Style | 0 | |
| S. lycopersicum (ui6.1) | 53.0 ± 11.4 | Style | 0 | |
| S. lycopersicum (ui1.1 + ui6.1) | 100 | N/A | >50 |
Pollen compatibility is indicated by the length of the longest pollen tube expressed as a percentage of the total length of the style and stigma (a value of 100% indicates a compatible cross). Values are the averages (±SE) of at least 3 replicate pistils for each cross. On the female side, the genotypes were S. lycopersicoides, and diploid and allotriploid F1 S. lycopersicum × S. lycopersicoides hybrids. On the male side, crosses were made with pollen from S. lycopersicoides, S. lycopersicum, S. pennellii, and bridging lines containing the ui1.1 and/or ui6.1 factors from S. pennellii introgressed into cultivated tomato. These genotypes are described in materials and methods.