Abstract
Brassica juncea and Brassica napus are economically important crops used for oilseed and forage who's seed is also used for herbal medicines, namely Brassicae Semen and Brassicae Campestris Semen, respectively. Morphological discrimination of these two herbal medicines is difficult because the seeds of the Brassica species have similar shapes. Since the descriptions of the different Brassicae Semen in the Korean and Chinese pharmacopoeia can be confused, it is necessary to develop an accurate method for identification of the different species. Therefore, DNA barcodes of six Brassica species, B. juncea, B. napus, B. nigra, B. oleracea, B. rapa, and Sinapis alba, collected from various locations and markets, were analyzed to develop a molecular marker for distinguishing Brassicae Semen and Brassicae Campestris Semen. Nucleotide sequence comparison and phylogenetic analysis of internal transcribed spacer (ITS) regions based on the amphidiploid types and U's triangle provide useful genetic information for the identification of these two herbal medicines and Brassica species. However, the sequences of the chloroplast maturase K (matK) gene showed species-specific insertions and deletions or substitutions only for B. nigra, B. oleracea, and S. alba but not for B. juncea, B. napus, and B. rapa. The use of genome-specific marker nucleotides in ITS regions provide an objective and accurate method for authentication of Brassica species and valuable information for further molecular marker development.
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Claims 3
Claim · model-written summary
The matK gene showed species-specific insertions, deletions or substitutions only for B. nigra, B. oleracea and S. alba.
- Gene
- matKe1
- Outcome
- species-specific insertions and deletions or substitutionse1
- Qualifier
- only for B. nigra, B. oleracea, and S. albae1
BrassicaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DNA barcodes of six Brassica species, B. juncea, B. napus, B. nigra, B. oleracea, B. rapa, and Sinapis alba, collected from various locations and markets”
e1“the sequences of the chloroplast maturase K (matK) gene showed species-specific insertions and deletions or substitutions only for B. nigra, B. oleracea, and S. alba but not for B. juncea, B. napus, and B. rapa”
Claim · model-written summary
ITS genome-specific marker nucleotides provide an objective and accurate method for authentication of Brassica species.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DNA barcodes of six Brassica species, B. juncea, B. napus, B. nigra, B. oleracea, B. rapa, and Sinapis alba, collected from various locations and markets”
e2“The use of genome-specific marker nucleotides in ITS regions provide an objective and accurate method for authentication of Brassica species”
Claim · model-written summary
ITS sequence comparison and phylogenetic analysis provide useful genetic information for identifying the two herbal medicines and Brassica species.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DNA barcodes of six Brassica species, B. juncea, B. napus, B. nigra, B. oleracea, B. rapa, and Sinapis alba, collected from various locations and markets”
e3“Nucleotide sequence comparison and phylogenetic analysis of internal transcribed spacer (ITS) regions based on the amphidiploid types and U's triangle provide useful genetic information for the identification of these two herbal medicines and Brassica species”