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- Title
Inheritance of high palmitic acid content in the sunflower mutant CAS-12 and its relationship with high oleic content.
- Authors
PÉREZ-VICH, B; GARCÉS, R; FERNÁNDEZ-MARTÍNEZ, J. M
- Abstract
CAS-12 is a sunflower mutant with increased levels of palmitic (C16 : 0=30%) and oleic (C18 : 1=55%) acids in its seed oil, hence it has a reduced linoleic acid content (C18 : 2 < 5%). This study was conducted to determine the inheritance of high C16 : 0 content and its relationship with high C18 : 1 content in CAS-12. Reciprocal crosses involving CAS-12, CAS-5 (high C16 : 0 content), HAOL-9 (high C18 : 1 content) and HA-89 (standard fatty acid profile) were made. The F1 , F2 and BC1 F1 generations were obtained. The genetic control of the high C16 : 0 trait in CAS-12 was partially recessive and gametophytic. In all cases, this character segregated in the ratio 19 : 38 : 7 (low : intermediate : high C16 : 0 content) in the F2 generation. These results, together with the lack of segregation for C16 : 0 content in crosses between CAS-12 and CAS-5, indicated that the genetic control of the high C16 : 0 trait in CAS-12 was similar to that in CAS-5 in being controlled by partially recessive alleles (p1 , p2 , and p3 ) at three loci. Crosses between HA-89 and CAS-12, and HAOL-9 and CAS-5 (segregating for C16 : 0 and C18 : 1) demonstrated that the high C16 : 0 and the high C18 : 1 traits were independently inherited. However, C18 : 1 segregation in these crosses exhibited reversal of dominance. Apparently, the low C18 : 1 parental lines carried modifier genes causing the deviation.
- Subjects
SUNFLOWERS; PALMITIC acid; OLEIC acid; LINOLEIC acid; GENETICS
- Publication
Plant Breeding, 2002, Vol 121, Issue 1, p49
- ISSN
0179-9541
- Publication type
Article
- DOI
10.1046/j.1439-0523.2002.00655.x