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Medientyp:
E-Artikel
Titel:
Nondestructive Assessment of Sinapic Acid Esters in Brassica Species: II. Evaluation of Germplasm and Identification of Phenotypes with Reduced Levels
Beschreibung:
<jats:p>The seed of <jats:italic>Brassica</jats:italic> spp. contain high levels of sinapic acid esters (SAE). Because of their antiquality nature, the presence of SAE limits the use of <jats:italic>Brassica</jats:italic> meal as a source of high‐quality protein. The objective of this study was to search for material with reduced SAE content in <jats:italic>Brassica</jats:italic> spp. A collection of 1487 accessions of 21 species of <jats:italic>Brassica</jats:italic> and a set of 1361 samples of breeding material of rapeseed (<jats:italic>B. napus</jats:italic> L.) were analyzed for SAE content by using a previously calibrated near infrared reflectance spectroscopy (NIRS) instrument. The accessions of the germplasm collection showed an average SAE content of 9.4 g kg<jats:sup>−1</jats:sup>, ranging from 1.7 g kg<jats:sup>−1</jats:sup> in an entry of <jats:italic>B. tournefortii</jats:italic> Gouan to 15.5 g kg<jats:sup>−1</jats:sup> in an entry of <jats:italic>B. carinata</jats:italic> A. Braun. Low levels of SAE were found in <jats:italic>B. barrelieri</jats:italic> (L.) Janka, <jats:italic>B. oxyrrhina</jats:italic> Coss., <jats:italic>B. souliei</jats:italic> (Batt.) Batt., and especially in <jats:italic>B. tournefortii</jats:italic>, with an average SAE content of 4.1 g kg<jats:sup>−1</jats:sup> in 31 accessions. Breeding material of <jats:italic>B. napus</jats:italic> ranged from 5.0 to 17.7 g kg<jats:sup>−1</jats:sup>. The samples with the lowest SAE content from both the germplasm collection (<jats:italic>n</jats:italic> = 112) and the breeding material (<jats:italic>n</jats:italic> = 75) were further analyzed by the laboratory reference method, with the low levels being confirmed. The SAE content was positively correlated with oil content, and negatively correlated with protein and glucosinolate contents. Because of the observed correlations, simultaneous selection for low SAE, low glucosinolate and high oil contents should be performed. The use of <jats:italic>B. tournefortii</jats:italic> germplasm having low SAE content in breeding programs can potentially reduce these compounds in cultivated <jats:italic>Brassica</jats:italic> oilseeds.</jats:p>