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Selection tools for oil content and fatty acid composition in safflower (Carthamus tinctorius L.).

Authors
  • Cerrotta, Alfonso1
  • Lindström, Lilia Ivone2
  • Echenique, Viviana1, 2
  • 1 Departamento de Agronomía, Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS-CONICET, CCT, Bahía Blanca), Universidad Nacional del Sur, San Andrés 800, Bahía Blanca, 8000, Argentina. , (Argentina)
  • 2 Departamento de Agronomía, Universidad Nacional del Sur, San Andrés 800, Bahía Blanca, 8000, Argentina. , (Argentina)
Type
Published Article
Journal
Breeding science
Publication Date
Dec 01, 2020
Volume
70
Issue
5
Pages
558–566
Identifiers
DOI: 10.1270/jsbbs.20053
PMID: 33603552
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Agricultural expansion requires the deployment of stress-tolerant crops like safflower (Carthamus tinctorius L.). In safflower breeding, oil improvement in early generations requires indirect selection through simply inherited traits. The oil quality is mostly related to the fatty acid profile, which is determined by the OL locus. The aim of this research was to identify simple easy-to-measure traits that indirectly explain oil content variation and its interaction with yield components, and also to generate an effective tool for genotyping the OL locus. A field experiment with F5 and pure lines was carried out to correlate the oil content with 18 traits including yield components, and phenological and morphological characteristics. KASP technology using primers designed according to the ctFAD2-1 gene sequence was applied for OL locus genotyping and validated through fatty acids phenotyping. Hull content, the length:width ratio of the grain, and plant height were identified as the most promising selection tools for increasing oil content, and grains per capitulum was the best yield component for increasing yield without decreasing the oil content. KASP genotyping successfully worked as a MAS tool, identifying oleic and linoleic genotypes. These tools enhance options for improving oil content and quality for safflower breeding. Copyright © 2020 by JAPANESE SOCIETY OF BREEDING.

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