|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: Wild species offer a diverse range of biological characteristics to potato breeders. One trait of interest is cold chipping (directly from 2 C storage) or with minimal reconditioning time. Acceptable chips have a color score of 4 or less on a scale of ten. Wild species expressing this trait include S. raphanifolium, S. sparsipilum, S. okadae and S. tarijense. The objectives were to incorporate this desirable species germplasm and to determine which species and PIs produce superior haploid-species hybrids. 28 haploid-species families were screened in 1994 for their ability to chip directly after 3 months of 2 C storage and after 6 days of 22 C reconditioning. Three families had 2, 6 and 13% acceptable clones when chipped directly, increasing to 4, 32 and 27% after reconditioning and in 1995 they chipped at 0, 16, and 18% direct and 3, 34, and 23% when reconditioned. Eight other families which did not chip directly had 3-12% acceptable clones after reconditioning. Families containing S. raphanifolium, PIs 296126 and 310998, consistently ranked in the top 5 for both chipping schemes over two years. Research was expanded to include 200 more haploid-species families generated from 14 species (35 PIs) and 18 haploids. Preliminary results indicated that at least one clone in 48 families chipped direct and one in 92 families after reconditioning.