ARS | Publication request: GENETIC LINKAGE MAP OF GARLIC

Submitted to: Proceedings American Society of Horticultural Sciences
Publication Type: Abstract Only
Publication Acceptance Date: June 5, 2004
Publication Date: July 15, 2004
Citation: Zewdie, Y., Havey, M.J., Prince, J.P., Jenderek, M.M. 2004. Genetic linkage map of garlic. Proceedings American Society of Horticultural Sciences.

Technical Abstract: Garlic (Allium sativum L.) is one of the economically important Alliums and produced exclusively asexual propagation. Because of Garlic's obligate vegetative reproduction, information regarding garlic genetics is very limited. The discovery of male fertile accessions in Central Asia stimulated research on garlic sexual reproduction. The goal of this research was to develop a linkage map of garlic and elucidate the genetic bases of male fertility and important morphological traits. The S1 population was grown in the field at Parlier, CA, in 2001/02 and 2002/03 growing seasons and morphological data were collected. On average, one SNP occurs per 210 bases and If this extrapolated to the entire genome (15,900 megabase) there could be as many as 7.5 x 107 SNPs in garlic. Thirty-six molecular markers and the male fertility locus produced nine linkage groups, covering 414.5 cM with the average distance of 14.8 cM between markers. Sixteen markers remained unlinked. Continuous variation was observed among the progenies for flower-stalk height, number flowers per umbel, number of cloves per bulb, bulb weight, and bulb size. Eleven quantitative trait locus (QTL) were identified for four traits. There were significant phenotypic correlation among these morphological traits.