Open AccessErucic‐acid heredity in rapeseed:( Brassica napus L. and Brassica campestris L.)
Author(s) -
JÖNSSON ROLAND
Publication year - 1977
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1977.tb01226.x
Subject(s) - erucic acid , rapeseed , brassica , allele , biology , dominance (genetics) , food science , horticulture , botany , genetics , gene
The erucic‐acid content in rape is controlled by multiple alleles and several homozygosity levels are found. Such levels between 5–10, 10–35 and with more than 35% erucic acid are controlled by alleles at one, one or two and two loci, respectively. The least effective allele, which can give less than 2% erucic acid, can be distinguished from the allele for absence of erucic acid because it gives more than 8% eicosenoic acid. The erucic‐acid content in turnip rape is controlled by multiple alleles at one locus. The correlation between the contents of erucic and eicosenoic acid is positive at erucic‐acid levels up to 25% but negative at higher levels. For erucic‐acid contents up to 30% the alleles show additive effect concerning the erucic‐acid content, while at higher concentrations partial dominance is common. Concerning the eicosenoic‐acid content, partial dominance prevails for alleles which give a lower erucic‐acid content and strong overdominance for alleles with more effective erucic‐acid production.