Scientists at the University of Florida led by Geoffrey Meru characterized resistance to Phytophthora crown rot in PI 181761 and identified a major QTL on chromsome 13. Several SNP markers were designed to target this QTL for marker-assisted selection.
This pHD candidate’s CucCAP grant research focused on developing squash breeding lines with some Phytophthora blight resistance and mapping genes involved in disease resistance. His other focus was pathogen population genetics. In CucCAP1 the squash team sequenced and characterized isolates of the causal agent, Phytophthora capsici, from around New York and mapped genes in the pathogen associated with mating type, fungicide resistance, and virulence.
CucCAP researchers and stakeholders met on October 27, 28 & 29, 2022 to present and discuss the grant’s accomplishments, ongoing research, plans and expectations. Michael Mazourek (Cornell Univ), Mary Hausbeck (Michigan St Univ), Shaker Kousik (USDA-ARS, Charleston), Geoffrey Meru (Univ Florida), Angela Linares Ramirez (Univ Puerto Rico), and Chris Smart (Cornell Univ.) reported on the Squash Team’s progress.
CucCAP scientist Andrea P. Landrón García’s research is focused on the creation of future resistant lines of squash with resistance to powdery mildew using resistant materials with local materials in Puerto Rico.
The CucCAP squash team is breeding squash for Powdery Mildew and Phytophthora rot resistance.
In Peurto Rico, Genotypes of Cucurbita moschata with a range of susceptibility were inoculated with Papaya ringspot virus and Zucchini yellow mosaic virus and evaluated in the greenhouse and field.
Dr. Meru’s team will collaborate with the universities of Puerto Rico and Georgia on the grant named “Specialty Pumpkin: Laying the Groundwork for an Emerging Crop and Lucrative Products.”
CucCAP scientists from the Cornell University research groups of Michael Mazourek and Christine Smart along with Michael Gore’s lab combined linkage mapping and bulked segregant methods for molecular mapping and QTL identification.