|Jackson, Scott - UNIVERSITY OF WISCONSIN|
|Hanneman Jr, Robert|
Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: June 28, 1996
Publication Date: N/A
Technical Abstract: The crossability of the cultivated potato with its wild relatives allows risk assessment associated with transgenic release and for choosing species parents for breeding. The crossability of cultivars with 115 wild species as males (11,234 pollinations) has been assessed. The highest seed sets were found among the 4x(4EBN) (40.7 s/f) and the 6x(4EBN) (10.6 s/f) species with "crossability success rates" (CSR) of 62.9% and 17.1%, respectively. The lowest seed set was in the 2x(1EBN) species with 18 fruit, 34 seeds (1.9 s/f), and a 4.0% CSR. The 2EBN species, dependent on 2n gametes, were intermediate in seed set. The 2x(2EBN) species set 312 fruit, 957 seeds (3.1 s/f), and had a 27.7% CSR. The 4x(2EBN) species set 31 fruit, 180 seeds (5.8 s/f) with 3.8% CSR. Crossability was also assessed using the species as females (4,471 pollinations). The 2x(1EBN) species had the lowest success rate with 1 fruit, 87 seeds (87 s/f), and a 3.7% CSR. The 2x(2EBN) species set 12 fruit, 15 seeds (1.3 s/f) and had a 9.3% CSR. The 4x(2EBN) species were better with 32 fruit, 241 seeds (7.5 s/f) and a 38.1% CSR. The highest seed set was the 4x(4EBN) species with 4 fruit, 288 seeds (72 s/f) and a 33.3% CSR. The best CSR occurred in the 6x(4EBN) species at 76.5% with 70 fruit, 2,686 seeds (38.3 s/f).