{"id":618,"date":"2018-09-14T18:12:53","date_gmt":"2018-09-14T17:12:53","guid":{"rendered":"http:\/\/wpd.ugr.es\/~fperfect\/?p=618"},"modified":"2018-09-14T18:22:03","modified_gmt":"2018-09-14T17:22:03","slug":"b-chromosome-invasion-prospero","status":"publish","type":"post","link":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/2018\/09\/14\/b-chromosome-invasion-prospero\/","title":{"rendered":"Long\u2010term monitoring of B\u2010chromosome invasion in a population of <i>Prospero autumnale<\/i>"},"content":{"rendered":"<p>The first paper of Pedro Lanzas&#8217; doctoral thesis has been published in <em>Evolution<\/em>. In it we analyze the transmission of a B chromosome in the bulbaceous plant <em>Prospero autumnale<\/em>, also known as <em>Scilla autumna<\/em><em>lis,\u00a0<\/em>the autumn squill.<\/p>\n<p><!--more--><\/p>\n<p>B chromosomes have been reported in about 15% of eukaryotes, but long\u2010term dynamics of B chromosomes in a single natural population has rarely been analyzed. <i>Prospero autumnale<\/i> plants collected in 1981 and 1983 at Cuesta de La Palma population had shown the presence of B chromosomes. We analyze here seven additional samples collected between 1987 and 2015, and show that B frequency increased significantly during the 1980s and showed minor fluctuations between 2005 and 2015. A mother\u2013offspring analysis of B chromosome transmission, at population level, showed significant drive on the male side (<i>k<sub>B<\/sub><\/i>\u00a0=\u00a00.65) and significant drag on the female side (<i>k<sub>B<\/sub><\/i>\u00a0=\u00a00.33), with average B transmission rate being very close to the Mendelian rate (0.5). No significant effects of B chromosomes were observed on a number of vigor and fertility\u2010related traits. Within a parasite\/host framework, these results suggest that B chromosomes\u2019 drive on the male side is the main pathway for B chromosome invasion, whereas B chromosome drag on the female side might be the main manifestation of host genome resistance in this species. <i>Prospero autumnale<\/i> thus illuminates a novel evolutionary pathway for B chromosome neutralization by means of a decrease in B transmission through the nondriving sex.<\/p>\n<figure id=\"attachment_621\" aria-describedby=\"caption-attachment-621\" style=\"width: 606px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-621 size-full\" src=\"http:\/\/wpd.ugr.es\/~fperfect\/wp-content\/uploads\/Scilla_autumnalis.jpg\" alt=\"By Meneerke bloem - Own work, CC BY-SA 3.0, https:\/\/commons.wikimedia.org\/w\/index.php?curid=1681351\" width=\"606\" height=\"717\" srcset=\"https:\/\/wpd.ugr.es\/~fperfect\/wp-content\/uploads\/Scilla_autumnalis.jpg 606w, https:\/\/wpd.ugr.es\/~fperfect\/wp-content\/uploads\/Scilla_autumnalis-254x300.jpg 254w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/><figcaption id=\"caption-attachment-621\" class=\"wp-caption-text\">Photo by Meneerke bloem &#8211; Own work, CC BY-SA 3.0, https:\/\/commons.wikimedia.org\/w\/index.php?curid=1681351<\/figcaption><\/figure>\n<p>Lanzas P, Perfectti F, Garrido-Ramos MA, Ru\u00edz-Rej\u00f3n C, Gonz\u00e1lez-S\u00e1nchez M, Puertas MJ, Camacho, JPM (2018).<br \/>\nLong-term monitoring of B-chromosome invasion and neutralization in a population of <em>Prospero autumnale<\/em> (Asparagaceae).<br \/>\n<strong>Evolution<\/strong>\u00a0<b>72: 1216\u20131224<\/b><br \/>\n<a href=\"http:\/\/dx.doi.org\/10.1111\/evo.13501\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-96 size-full\" src=\"http:\/\/wpd.ugr.es\/~fperfect\/wp-content\/uploads\/DOI.png\" alt=\"DOI\" width=\"32\" height=\"16\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The first paper of Pedro Lanzas&#8217; doctoral thesis has been published in Evolution. In it we analyze the transmission of a B chromosome in the bulbaceous plant Prospero autumnale, also known as Scilla autumnalis,\u00a0the autumn squill.<\/p>\n","protected":false},"author":1,"featured_media":621,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false},"categories":[6,3],"tags":[],"_links":{"self":[{"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/posts\/618"}],"collection":[{"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/comments?post=618"}],"version-history":[{"count":6,"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/posts\/618\/revisions"}],"predecessor-version":[{"id":625,"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/posts\/618\/revisions\/625"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/media\/621"}],"wp:attachment":[{"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/media?parent=618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/categories?post=618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpd.ugr.es\/~fperfect\/index.php\/wp-json\/wp\/v2\/tags?post=618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}