ARS | Publication request: BREEDING 2X HAPLOID X SPECIES POTATOES THAT CHIP FROM 2C COLD STORAGE

Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: April 20, 1998
Publication Date: N/A

Technical Abstract: Breeding for cold storage chipping potatoes is desired by the industry to preserve tuber quality, control diseases and reduce the need for sprout inhibitors. The development of diploid potatoes which chip acceptably directly following three months 2 C storage and/or after six days 20-22 C reconditioning was accomplished by crossing wild and cultivated species Pis known to possess the cold chipping trait to haploids varying in their reconditioning ability. Chipping means of Pis and haploid parents were categorized as being good (< 6.0), medium (6.1-8.0) or poor (> 8.1) based on a scale of 1=light to 10=dark. Species PI parents were categorized for direct chipping following three months 2 C storage and after six days 20-22 C reconditioning while haploid parents were categorized after 16 days 20-22 C reconditioning following three months 2 C storage. PI mean scores for direct chipping and reconditioning were good indicators for direct chipping and reconditioning performance of progeny as good categorized PIs were involved in producing a higher frequency of good/acceptable (< 4.5) chipping progeny followed by medium and poor categorized PI parents. Haploid reconditioning scores overall were a fair indicator for direct chipping performance of progeny and were a better indicator for reconditioning performance of progeny produced by them as good reconditioning haploids produced a higher frequency of acceptable chipping progeny followed by medium and poor categorized haploid parents. PI selection appears to have a greater influence on progeny performance, followed by haploid selection based on these results.