High SNP diversity in the non-toxic indigenous Jatropha curcas germplasm widens the potential of this upcoming major biofuel crop species.

摘要: Background and aims Jatropha curcas (jatropha) is an oil crop cultivated in (sub)tropical regions around the world, holds great promise as a renewable energy source. However, efforts to fully commercialize jatropha are currently hampered by lack of genetic diversity extant breeding germplasm, toxicity its seeds meaning that seed cake cannot be used protein source animal feed, among other constraints. In Mexico, species' native range, there plants whose prepare traditional meals. This non-toxic 'type' considered harbour low variation due presumed domestication bottleneck therefore limited value; yet, very little known regarding origin diversity. Methods Using genotyping-by-sequencing (GBS), we extensively genotyped both indigenous toxic collected along roads home gardens throughout southern Mexico. Key results Single nucleotide polymorphism relatively high, particularly northern Veracruz state, probable this germplasm. Genetic differences between genotypes overall quite small. A genome-wide association study supported genomic region (on LG 8, scaffold NW_012130064), probably involved suppression toxicity. Conclusions Conservation actions urgently needed preserve indigenous, wild having potential fuel feedstock, feed food uses. More generally, work demonstrates value conservation research on gene pool economically important plant species.