科研之友
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摘要
Eleven primers were synthesized according to the reverse transcriptase and long terminal repeat (LTR) conserved regions of retrotransposons BARE-1 from barley (Hordeum vulgare L.) and RIRE-1 from rice (Oryza sativa L.). Fifty-two pairs of primer combinations based on these 11 primers were used for DNA amplification of Chinese Spring-Thinopyrum elongatum addition lines, substitution lines plus the two parents. It showed that 145 specific fragments of inter-simple sequence repeat (ISSR), inter-retrotransposon amplified polymorphism (IRAP), and retrotransposon microsatellite amplified polymorphism (REMAP) were obtained which distributed over all the seven E-genome chromosomes of Th. elongatum. Sixty specific fragments of ISSR, IRAP, and REMAP were randomly selected for cloning and sequencing. Thirty-four sequences were found not to be homologous with wheat (Triticum aestivum L.) sequences in GenBank, which were considered to be the specific sequences of Th. elongatum. Thirty-four pairs of primers based on these 34 specific sequences were synthesized, and 13 chromosome-specific markers of Th. elongatum were identified and converted into SCAR markers. The results indicated that ISSR, IRAP, and REMAP techniques can be used to develop chromosome-specific sequence-characterized amplified regions (SCAR) markers with good stability and repeatability. These specific SCAR markers can now be used to detect Th. elongatum chromosomes and possibly even some introgressed segments in a wheat background.
- 出版日期2015-12
- 单位扬州大学
