Browse Articles

Article|01 Nov 2020|OPEN
Accumulation of mutations in genes associated with sexual reproduction contributed to the domestication of a vegetatively propagated staple crop, enset
Kiflu Gebramicael Tesfamicael1 , Endale Gebre2 , Timothy J. March3 , Beata Sznajder3 , Diane E. Mather3 and Carlos Marcelino Rodríguez López,1 ,
1Environmental Epigenetics and Genetics Group, Department of Horticulture, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY 40546, USA
2Policy Study Institute, P.O. Box: 2479, Addis Ababa, Ethiopia
3School of Agriculture, Food & Wine, The University of Adelaide, Waite Campus, Glen Osmond, SA, Australia
*Corresponding author. E-mail: carlos.rodriguezlopez@uky.edu

Horticulture Research 7,
Article number: 185 (2020)
doi: https://doi.org/10.1038/s41438-020-00409-7
Views: 716

Received: 28 Apr 2020
Revised: 19 Jul 2020
Accepted: 10 Sep 2020
Published online: 01 Nov 2020

Abstract

Enset (Ensete ventricosum (Welw.) Cheesman) is a drought tolerant, vegetatively propagated crop that was domesticated in Ethiopia. It is a staple food for more than 20 million people in Ethiopia. Despite its current importance and immense potential, enset is among the most genetically understudied and underexploited food crops. We collected 230 enset wild and cultivated accessions across the main enset producing regions in Ethiopia and applied amplified fragment length polymorphism (AFLP) and genotype by sequencing (GBS) analyses to these accessions. Wild and cultivated accessions were clearly separated from each other, with 89 genes found to harbour SNPs that separated wild from cultivated accessions. Among these, 17 genes are thought to be involved in flower initiation and seed development. Among cultivated accessions, differentiation was mostly associated with geographical location and with proximity to wild populations. Our results indicate that vegetative propagation of elite clones has favoured capacity for vegetative growth at the expense of capacity for sexual reproduction. This is consistent with previous reports that cultivated enset tends to produce non-viable seeds and flowers less frequently than wild enset.