Skip to main content
ARS Home » Pacific West Area » Aberdeen, Idaho » Small Grains and Potato Germplasm Research » Research » Publications at this Location » Publication #392143

Research Project: Potato Genetic Improvement for Enhanced Tuber Quality and Greater Productivity and Sustainability in Western U.S. Production

Location: Small Grains and Potato Germplasm Research

Title: Revealing the genetic diversity of native landrace potatoes maintained in situ by farmers from Pasco and Sierra de Lima region in Peru

item Anglin, Noelle
item SOTO, JULIAN - International Potato Center
item GOMEZ, RENE - International Potato Center
item CHAVEZ, OSWALDO - International Potato Center
item SCURRAH, MARIA - Yanapai Group
item CCANTO, RAUL - Yanapai Group
item MANRIQUE, NORMA - International Potato Center
item AZEVEDO, VANIA - International Potato Center
item DE HAAN, STEF - International Potato Center
item HEIDER, BETTINA - International Potato Center

Submitted to: Abstracts of the Sixth World Potato Congress
Publication Type: Abstract Only
Publication Acceptance Date: 2/27/2022
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The genetic diversity conserved in situ by farmers in native hotspot highland areas of Pasco and Sierra de Lima in Peru was compared to the ex situ potatoes maintained in the International Potato Center (CIP) Genebank. A total of 1,075 potato cultivars from ten communities from Pasco and four from Lima were collected in collaboration with 14 farmers (one per community) through the farmer’s association AGUAPAN and the NGO Grupo Yanapai. DNA was obtained from sprouted tuber tissues and genotyped using the Illumina Infinitum SolCAP-V4 potato SNP array. The genotype calls of each marker per sample were obtained using the GenomeStudio software. A total of 2,759 markers were used after filtering out markers with low genotyping quality. The SNP data analysis revealed inter- and intraspecific relationships between the CIP collection and the in situ conserved landraces. A total of six taxonomic groups following Hawkes’s classification and four ploidy levels (2x to 5x) were identified in the in situ conserved landraces. The community of Caruya (Lima) had the greatest frequency of cultivars identified as S. tuberosum subsp. andigenum (Juz. and Bukasov) Hawkes, the most common species identified in these regions, while the community of Gargar (Pasco) had the greatest diversity of species. We identified 88 unique accessions from the communities that are not present in the CIP collection. These results showed that there is still genetic diversity conserved in situ in Peru that is not represented in the ex situ collections, highlighting genetic gaps in the Genebank. Integrated conservation based on active linkages between ex and in situ approaches is essential. Through this research and collaboration with Peruvian farmers, new genetic diversity has been identified and the unique materials were added to the CIP Genebank to preserve this diversity into perpetuity in agreement (ITPGRFA-SMTA) with custodian farmers and AGUAPAN.