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Research article - Peer-reviewed, 2020

QTL mapping for domestication-related characteristics in field cress (Lepidium campestre)—a novel oil crop for the Subarctic region

Hammenhag, Cecilia; Saripella, Ganapathi Varma; Ortiz, Rodomiro; Dida, Mulatu Geleta

Abstract

Domestication of a new crop requires identification and improvement of desirable characteristics Field cress (Lepidium campestre) is being domesticated as a new oilseed crop, particularly for northern temperate regions.. In the present study, an F-2 mapping population and its F-3 progenies were used to identify quantitative trait loci (QTLs) for plant height (PH), number of stems per plant (NS), stem growth orientation (SO), flowering habit (FH), earliness (ER), seed yield per plant (SY), pod shattering resistance (SHR), and perenniality (PE). A highly significant correlation (p < 0.001) was observed between several pairs of characteristics, including SY and ER (negative) or ER and PE (positive). The inclusive composite interval mapping approach was used for QTL mapping using 2330 single nucleotide polymorphism (SNP) markers mapped across the eight field cress linkage groups. Nine QTLs were identified with NS, PH, SO, and PE having 3, 3, 2, and 1 QTLs, explaining 21.3%, 29.5%, 3.8%, and 7.2% of the phenotypic variation, respectively. Candidate genes behind three of the QTLs and favorable marker alleles for different classes of each characteristic were identified. Following their validation through further study, the identified QTLs and associated favorable marker alleles can be used in marker-aided breeding to speed up the domestication of field cress.

Keywords

candidate genes; comparative genomics; domestication; Lepidium campestre; field cress; mapping population; oil crop; phenotype; quantitative trait loci (QTL) mapping; traits;

Published in

Genes
2020, volume: 11, number: 10, article number: 1223

Authors' information

Swedish University of Agricultural Sciences, Department of Plant Breeding
Swedish University of Agricultural Sciences, Department of Plant Breeding
Ortiz, Rodomiro (Ortiz Rios, Rodomiro Octavio)
Swedish University of Agricultural Sciences, Department of Plant Breeding
Swedish University of Agricultural Sciences, Department of Plant Breeding

UKÄ Subject classification

Agricultural Science
Genetics and Breeding
Plant Biotechnology

Publication Identifiers

DOI: https://doi.org/10.3390/genes11101223

URI (permanent link to this page)

https://res.slu.se/id/publ/108189