Editing Trifolium repens (section)

== Ancestry ==
''Trifolium repens'' is an allotetraploid (2n = 4x = 32) of two diploid ancestors and exhibits disomic inheritance.<ref name=":0">{{Cite journal|last1=Ellison|first1=Nick W.|last2=Liston|first2=Aaron|last3=Steiner|first3=Jeffrey J.|last4=Williams|first4=Warren M.|last5=Taylor|first5=Norman L.|title=Molecular phylogenetics of the clover genus (Trifolium—Leguminosae)|journal= [[Molecular Phylogenetics and Evolution]] |volume=39|issue=3|pages=688–705|doi=10.1016/j.ympev.2006.01.004|pmid=16483799|year=2006|bibcode=2006MolPE..39..688E }}</ref> In order to increase genetic diversity for breeding, research is focused on finding these ancestors. Proposed ancestors of ''T. repens'' include ''[[Trifolium nigrescens|T. nigrescens]]'', ''[[Trifolium occidentale|T. occidentale]]'', ''[[Trifolium pallescens|T. pallescens]]'', and ''[[Trifolium uniflorum|T. uniflorum]]''.<ref name=":0" /><ref>{{Cite journal|last1=Williams|first1=Warren M.|last2=Ellison|first2=Nicholas W.|last3=Ansari|first3=Helal A.|last4=Verry|first4=Isabelle M.|last5=Hussain|first5=S. Wajid|date=2012-04-24|title=Experimental evidence for the ancestry of allotetraploid ''Trifolium repens'' and creation of synthetic forms with value for plant breeding|journal=BMC Plant Biology|volume=12|issue=1 |page=55|doi=10.1186/1471-2229-12-55|pmid=22530692|pmc=3443075|issn=1471-2229 |doi-access=free |bibcode=2012BMCPB..12...55W }}</ref><ref>{{Cite journal|last1=Williams|first1=W. M.|last2=Ansari|first2=H. A.|last3=Hussain|first3=S. W.|last4=Ellison|first4=N. W.|last5=Williamson|first5=M. L.|last6=Verry|first6=I. M.|date=2008-01-01|title=Hybridization and Introgression between Two Diploid Wild Relatives of White Clover, Trifolium nigrescens Viv. and T. occidentale Coombe|url=https://www.crops.org/publications/cs/abstracts/48/1/139|journal=Crop Science|language=en|volume=48|issue=1|pages=139–148|doi=10.2135/cropsci2007.05.0295|issn=1435-0653|url-access=subscription}}</ref><ref>{{Cite journal|last1=Badr|first1=A.|last2=El-Shazly|first2=H. H.|last3=Mekki|first3=L.|date=2012-06-01|title=Genetic diversity in white clover and its progenitors as revealed by DNA fingerprinting|journal=Biologia Plantarum|language=en|volume=56|issue=2|pages=283–291|doi=10.1007/s10535-012-0088-0|s2cid=14983555|issn=0006-3134|doi-access=free}}</ref> Additionally, it is possible that one of the diploid ancestors has yet to be analyzed, either because it has not been discovered or is extinct.<ref>{{Cite journal|last1=Hand|first1=Melanie L.|last2=Ponting|first2=Rebecca C.|last3=Drayton|first3=Michelle C.|last4=Lawless|first4=Kahlil A.|last5=Cogan|first5=Noel O. I.|last6=Brummer|first6=E. Charles|last7=Sawbridge|first7=Timothy I.|last8=Spangenberg|first8=German C.|last9=Smith|first9=Kevin F.|date=2008-10-01|title=Identification of homologous, homoeologous and paralogous sequence variants in an outbreeding allopolyploid species based on comparison with progenitor taxa|journal=Molecular Genetics and Genomics|language=en|volume=280|issue=4|pages=293–304|doi=10.1007/s00438-008-0365-y|pmid=18642031|s2cid=24487483|issn=1617-4615}}</ref>