Conserved simple sequence repeats for the Limnanthaceae (Brassicales)

Area of Science:

• Plant genetics
• Molecular biology
• Agricultural science

Background:

• The Limnanthaceae family, including meadowfoam (Limnanthes), is native to western North America.
• Cultivated meadowfoam (L. alba) is a significant industrial oilseed crop, driving research in its genetics and breeding.
• A need exists for robust genetic markers to support research in wild and cultivated meadowfoam.

Purpose of the Study:

• To develop a substantial set of simple sequence repeat (SSR) markers for meadowfoam.
• To facilitate genetic mapping, molecular breeding, and genomics research in Limnanthaceae.
• To assess the utility and polymorphism of these SSR markers across various meadowfoam taxa.

Main Methods:

• Genomic DNA libraries of L. alba were enriched for AG(n) and AC(n) repeats.
• Clones were sequenced to identify SSRs, and primers were designed and tested.
• Developed SSR markers were screened for cross-taxa amplification and polymorphism in ten Limnanthaceae taxa.

Main Results:

• 389 SSR markers were developed for cultivated meadowfoam.
• 373 markers showed polymorphism across ten taxa, with 106 amplifying loci in all taxa.
• High levels of genetic diversity were observed, with mean haplotype heterozygosities of 0.71 in L. alba and 0.63 across ten taxa.

Conclusions:

• The developed SSR markers provide essential high-throughput genetic tools for Limnanthaceae research.
• These markers will accelerate the development of a genetic linkage map for meadowfoam.
• The findings support advanced molecular breeding and genomic studies in meadowfoam species.