Abstract:
:In plants, polyploidy has been a significant evolutionary force on both recent and ancient time scales. In 1950, Ownbey reported two newly formed Tragopogon allopolyploids in the northwestern United States. We have made the first synthetic lines of T. mirus and T. miscellus using T. dubius, T. porrifolius, and T. pratensis as parents and colchicine treatment of F(1) hybrids. We also produced allotetraploids between T. porrifolius and T. pratensis, which are not known from nature. We report on the crossability between the diploids, as well as the inflorescence morphology, pollen size, meiotic behavior, and fertility of the synthetic polyploids. Morphologically, the synthetics resemble the natural polyploids with short- and long-liguled forms of T. miscellus resulting when T. pratensis and T. dubius are reciprocally crossed. Synthetic T. mirus was also formed reciprocally, but without any obvious morphological differences resulting from the direction of the cross. Of the 27 original crosses that yielded 171 hybrid individuals, 18 of these lineages have persisted to produce 386 S(1) progeny; each of these lineages has produced S(2) seed that are viable. The successful generation of these synthetic polyploids offers the opportunity for detailed comparative studies of natural and synthetic polyploids within a nonmodel system.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Tate JA,Symonds VV,Doust AN,Buggs RJ,Mavrodiev E,Majure LC,Soltis PS,Soltis DEdoi
10.3732/ajb.0800299subject
Has Abstractpub_date
2009-05-01 00:00:00pages
979-88issue
5eissn
0002-9122issn
1537-2197pii
96/5/979journal_volume
96pub_type
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journal_title:American journal of botany
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journal_title:American journal of botany
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journal_title:American journal of botany
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更新日期:2012-05-01 00:00:00
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journal_title:American journal of botany
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更新日期:2008-03-01 00:00:00
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pub_type: 杂志文章
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更新日期:2006-12-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2019-10-01 00:00:00
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journal_title:American journal of botany
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更新日期:2010-03-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:1997-10-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:1998-04-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2016-02-01 00:00:00
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pub_type: 杂志文章
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更新日期:2018-11-01 00:00:00
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journal_title:American journal of botany
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更新日期:2003-04-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:2000-04-01 00:00:00
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journal_title:American journal of botany
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更新日期:2020-12-06 00:00:00
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journal_title:American journal of botany
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更新日期:2018-10-01 00:00:00
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journal_title:American journal of botany
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更新日期:2002-02-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2016-01-01 00:00:00
abstract:PREMISE OF THE STUDY:Subtribe Hakeinae (526 spp.) represents a large Australian plant radiation central to our understanding of that flora's evolution and ecology. It contains Grevillea-the third largest plant genus in Australia and a group inferred to have among the highest diversification rates in the angiosperms. Ho...
journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2015-10-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2004-07-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.94.2.184
更新日期:2007-02-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1300191
更新日期:2014-02-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1100391
更新日期:2012-02-01 00:00:00