Abstract Detail

Systematics

Popecki, Margot [1], Leebens-Mack, Jim [2].

Genetic Diversity Across Asparagus Breeding Lines.

Garden asparagus (Asparagus officinalis) is a valuable vegetable crop and has been farmed across Europe for more than 2,000 years. The breeding history of asparagus has been complex due to regional growing conditions, in addition to selection on traits such as spear size, and those contributing to aroma, flavor, and medicinal application. More recently, crosses between divergent cultivars and undomesticated populations has led to increased genetic admixture in the asparagus breeding program. In order to develop a foundation for understanding the genome-wide patterns of genetic variation and structure of garden asparagus breeding stocks, we have re-sequenced eight A. officinalis double haploid lines, which were mapped to the recently published reference genome. After stringent filtering for possible mapping to duplicated loci, we identified single-nucleotide polymorphisms (SNPs) with minor allele frequencies greater than 0.125. Genetic similarity was determined by estimating pairwise distances, and a dendogram was constructed to evaluate the genetic similarity among lines. Sex-specific SNPs were extracted from both the sex-determining region and adjacent recombining region on the Y-chromosome to assess differences in nucleotide diversity. Resequencing of wild relatives was also performed to compare patterns of variation within and between species.

1 - University of Georgia, Genetics, 370 Flint St, Athens, GA, 30601, USA
2 - University of Georgia, Plant Biology, Athens, GA

Keywords:
population genetics
Systematics.

Presentation Type: Poster
Session: P, Systematics
Location: Grand Ballroom - Exhibit Hall/Mayo Civic Center
Date: Monday, July 23rd, 2018
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PSY005
Abstract ID:819
Candidate for Awards:None