In addition to the large diverse in trust collection of potato, sweetpotato and ARTCs conserved by the CIP genebank, the genebank also maintains and conserves an important collection of potato and sweetpotato breeding lines and genetic stocks in collaboration with the Roots, Tubers and Bananas CRP (RTB).
The maintenance and distribution of these breeding lines is a critical asset to breeders and researchers worldwide. Currently ~3,400 potato and ~631 sweetpotato breeding lines are conserved and distributed as in vitro clones to requestors globally. 82% of the potato and 92% of the sweetpotato clones were developed in Peru with the rest derived from other countries . These clones have characteristics of interest for breeding programs as potential sources of traits for new varieties to adapt to climate change, consumer demands, increase food security, nutrition, and enhance the income for poor farmers. The breeding lines are cleaned of viruses and other diseases to facilitate distribution. Their conservation and distribution are vital to CIP and CGIAR. The maintenance of the in vitro conservation of breeding lines for national and international distribution is supported as service work through RTB.
Breeding lines and genetic stocks in the Genebank are designated under the International Treaty for Plant Genetic Resources for Food and Agriculture (ITPGRFA) and therefore are subject to the terms and conditions set of the Standard Material Transfer Agreement (SMTA) for distribution and use. Accessions designated as PGRFA_ud are distributed with additional terms to the SMTA as determined on a case by case basis by the breeder.
Interesting breeding lines and genetic stock collections include:
- A potato populations developed for biofortification of iron, zinc, and vitamin C.
- A potato populations late blight and heat tolerant resistant.
- A potato population developed for enhanced nutrient levels such as the colored flesh (high in anthocyanin and antioxidants).
- The in vitro potato mapping population ”DMDD”. This population was used to construct a genetic linkage map for anchoring the potato genome sequence. This population segregates for ~150 traits including yield, mineral content, abiotic stress tolerance, as well as, various morphological traits (flower, fruit, leaf, stem and tuber traits). The progenitors and the progeny are available for international distribution.
- The Beauregard x Tanzania sweetpotato mapping population (hexaploid population)
- The M9xM19 wild sweetpotato mapping population (diploid population).