{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T12:30:52Z","timestamp":1775305852139,"version":"3.50.1"},"reference-count":60,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2006,11,1]],"date-time":"2006-11-01T00:00:00Z","timestamp":1162339200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American J of Botany"],"published-print":{"date-parts":[[2006,11]]},"abstract":"<jats:p>Polyploidization, often accompanied by hybridization, has been of major importance in flowering plant evolution. Here we investigate the importance of these processes for the evolution of the tetraploid crucifer <jats:italic>Capsella bursa\u2010pastoris<\/jats:italic> using DNA sequences from two chloroplast loci as well as from three nuclear low\u2010copy genes<jats:italic>.<\/jats:italic> The near\u2010absence of variation at the <jats:italic>C. bursa\u2010pastoris<\/jats:italic> chloroplast markers suggests a single and recent origin of the tetraploid. However, despite supporting a single phylogeny, chloroplast data indicate that neither of the extant <jats:italic>Capsella<\/jats:italic> diploids is the maternal parent of the tetraploid. Combined with data from the three nuclear loci, our results do not lend support to previous hypotheses on the origin of <jats:italic>C. bursa\u2010pastoris<\/jats:italic> as an allopolyploid between the diploids <jats:italic>C. grandiflora<\/jats:italic> and <jats:italic>C. rubella<\/jats:italic> or an autopolyploid of <jats:italic>C. grandiflora<\/jats:italic>. Nevertheless, for each locus, some of the <jats:italic>C. bursa\u2010pastoris<\/jats:italic> accessions harbored <jats:italic>C. rubella<\/jats:italic> alleles, indicating that <jats:italic>C. rubella<\/jats:italic> contributed to the gene pool of <jats:italic>C. bursa\u2010pastoris<\/jats:italic>, either through allopolyploid speciation or, more likely, through hybridization and introgression. To our knowledge, this study is the first of a wild, nonmodel plant genus that uses a combination of chloroplast and multiple low\u2010copy nuclear loci for phylogenetic inference of polyploid evolution.<\/jats:p>","DOI":"10.3732\/ajb.93.11.1714","type":"journal-article","created":{"date-parts":[[2008,2,29]],"date-time":"2008-02-29T17:42:44Z","timestamp":1204306964000},"page":"1714-1724","source":"Crossref","is-referenced-by-count":51,"title":["Intrageneric phylogeny of <i>Capsella<\/i> (Brassicaceae) and the origin of the tetraploid <i>C. bursa\u2010pastoris<\/i> based on chloroplast and nuclear DNA sequences"],"prefix":"10.1002","volume":"93","author":[{"given":"T.","family":"Slotte","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Ceplitis","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B.","family":"Neuffer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H.","family":"Hurka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Lascoux","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,11]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-313x.2000.00790.x"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pbi.2005.01.001"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1055-7903(03)00208-2"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/35048692"},{"key":"e_1_2_7_6_1","first-page":"318","article-title":"Systematics of the halimolobine Brassicaceae: evidence from three loci and morphology.","volume":"27","author":"Bailey C. 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