QTL analysis for tuber size and shape in a tetraploid mapping population derived from Palisade Russet
Date & Time
Tuesday, July 19, 2022, 1:30 PM

Palisade Russet represents the russet market class which is characterized as having a long tuber shape for producing French fries. Potato tuber size and shape are important agronomic traits in this market class of potatoes with impact on quality, consistency, and product recovery of processed foods such as French fries. Therefore, identifying genetic regions which impact tuber size and shape, would be useful to potato breeding programs, especially in the further development of molecular markers useful for marker-assisted selection (MAS). To better understand the underlying genetics of tuber size and shape, QTL analysis was conducted on a tetraploid mapping population derived from the cross between Palisade Russet and breeding clone ND028673B-2Russ. Both length and width of the tubers produced from the two parents and progeny were measured over a two-year period in field studies. Additionally, tuber depth was measured since flattened tubers can negatively impact the recovery of French fries following processing. The Illumina Infinium SolCAP V2 22K potato SNP array was used for genotyping the whole mapping population. ClusterCall and MAPpoly (R-packages) were subsequently used for autotetraploid SNP calling and linkage mapping. The generated 12 chromosome linkage maps and the phenotypic data were loaded on QTLpoly (R-package that was developed for polyploid QTL analyses). Preliminary results of the molecular analyses will be presented.

Session Type
Parent Session
7/19 - Concurrent Sessions F