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Distinction of intergeneric hybrids between Argyranthemum frutescens (L.) Sch. Bip. and Rhodanthemum gayanum (Cross. &amp; Durieu) B.H. Wilcox, K. Bremer &amp; Humphries is important for the development of new intergeneric hybrids. The aim of this study was to develop a simple and cost-effective DNA marker to distinguish between a large number of putative hybrids of A. frutescens × R . gayanum during primary selection. We designed sequence-characterized amplified region (SCAR) markers based on the genetic sequences of the internal transcribed spacer (ITS) region for A. frutescens and R . gayanum . Specific SCAR markers for A. frutescens amplified bands in A. frutescens and hybrids but not in R. gayanum . In contrast, specific SCAR markers for R. gayanum amplified bands in R. gayanum and hybrids but not in A. frutescens . Additionally, we confirmed the reproducibility of the SCAR marker using 31 cultivars. The findings demonstrated that these SCAR markers could be used to distinguish putative hybrids between A. frutescens and R . gayanum . This is the first report of the development of a SCAR marker to facilitate distinction of these hybrids.

plant biotechnology

Development of the sequence-characterized amplified region (SCAR) marker for distinction of intergeneric hybrids between &lt;i&gt;Argyranthemum frutescens&lt;/i&gt; (L.) Sch. Bip. and &lt;i&gt;Rhodanthemum gayanum&lt;/i&gt; (Coss. &amp; Durieu) B.H. Wilcox, K. Bremer &amp; Humphries