The possibilities for further reduction of the glucosinolate content in seeds of double low rapeseed (Brassica napus L.)
Journal Title: Rośliny Oleiste - Oilseed Crops - Year 2016, Vol 37, Issue 1
Abstract
The aim of the presented research has been to select double low winter oilseed rape lines with extremely low alkenyl glucosinolates content, less than 5 µM·g-1 seeds, from population comprising double low winter oilseed rape lines with high oleic acid content (C18:1 ≥ 75%) in seed oil. The plant material consisted of 23 inbred lines from two research programs at IHAR-PIB Poznan. The first group of 16 lines comprised genotypes characterized by high oleic acid content, more than 80%, and lowered linoleic and linolenic acid content (to 6% of each), selected from 165 recombinants of M10453 and M10464 high oleic mutants and breeding lines and population varieties of high agronomic value. The second group of 7 lines originated from recombinant breeding using natural variability. The selected lines were characterized by very low glucosinolate content (less than 5 µM·g-1 seed) and increased oleic acid content (over 70%). Obtained breeding lines with high oleic acid content and lines with reduced glucosinolate content in seeds reached the yielding level similar to the current population varieties. Differences in fatty acid and glucosinolate content in seeds of these lines are no longer correlated with seed yield and weight of 1000 seeds. Further lowering of glucosinolate content and differentiation of fatty acids content should not adversely affect the yielding of new breeding lines. Significantly negative correlation between oil content in the seed and total of alkenyl glucosinolate content provides opportunity to continue the decrease of glucosinolate content without adversely affecting the oil content in seeds of new genotypes. Statistically highly significant negative correlation between oleic acid content and linoleic and linolenic acids content was observed. This dependency can be used in further work on even bigger differentiation of fatty acid composition in rapeseed oil. Applied methods of recombinant breeding using natural variability and variability induced by chemical mutagenesis, though laborious and lengthy, have proved to be effective.
Authors and Affiliations
Stanisław Spasibionek, Marcin Matuszczak, Teresa Piętka, Krystyna Krótka, Jan Krzymański
Keywords
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