Siberian columbine
... that the Siberian columbine has been crossed with another species in the genus Aquilegia to determine the gene behind the genus's nectar spurs?
... that the <b id="mwBSQ"><a href="./Aquilegia_sibirica" id="mwBSU" rel="mw:WikiLink" title="Aquilegia sibirica">Siberian columbine</a></b> has been <a href="./Hybrid_(biology)" id="mwBSY" rel="mw:WikiLink" title="Hybrid (biology)">crossed</a> with another species in the genus <i id="mwBSc"><a href="./Aquilegia" id="mwBSg" rel="mw:WikiLink" title="Aquilegia">Aquilegia</a></i> to determine the gene behind the genus's <a href="./Nectar_spur" id="mwBSk" rel="mw:WikiLink" title="Nectar spur">nectar spurs</a>?