Abstract:
:Very little is known regarding how repetitive elements evolve inpolyploid organisms. Here we address this subject by fluorescent insitu hybridization (FISH) of 20 interspersed repetitive elements tometaphase chromosomes of the cotton AD-genome tetraploid Gossypiumhirsutum and its putative A- and D-genome diploid ancestors. Theseelements collectively represent an estimated 18% of the G.hirsutum genome, and constitute the majority of high-copyinterspersed repetitive elements in G. hirsutum. Seventeen ofthe elements yielded FISH signals on chromosomes of both G.hirsutum subgenomes, while three were A-subgenome specific. Hybridization of eight selected elements, two of which were A-subgenomespecific, to the A(2) genome of G. arboreum yielded asignal distribution that was similar to that of the G. hirsutumA-subgenome. However, when hybridized to the D(5) genome ofG. raimondii, the putative diploid ancestor of the G.hirsutum D-subgenome, none of the probes, including elements thatstrongly hybridized to both G. hirsutum subgenomes, yieldeddetectable signal. The results suggest that the majority, although notall, G. hirsutum interspersed repetitive elements haveundergone intergenomic concerted evolution following polyploidizationand that this has involved colonization of the D-subgenome byA-subgenome elements and/or replacement of D-subgenome elements byelements of the A-subgenometype.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Hanson R,Zhao XP,Islam-Faridi MN,Paterson A,Zwick M,Crane C,McKnight T,Stelly D,Price HJsubject
Has Abstractpub_date
1998-10-01 00:00:00pages
1364-8issue
10eissn
0002-9122issn
1537-2197pii
85/10/1364journal_volume
85pub_type
杂志文章abstract:PREMISE OF THE STUDY:Miscanthus, a nonfood plant with high potential as a biofuel, has been used in Europe and the United States. The selection of a cultivar with high biomass, photosynthetic efficiency, and stress resistance from wild populations has become an important issue. New genic microsatellite markers will aid...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1100071
更新日期:2011-08-01 00:00:00
abstract::In the alpine landscape most plant populations are spatially isolated due to extreme patchiness and strong natural fragmentation. We used RAPD-PCR (randomly amplified polymorphic DNA polymerase chain reaction) for a study of the genetic diversity within and among 20 populations of Geum reptans, an outcrossing clonal p...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.91.12.2013
更新日期:2004-12-01 00:00:00
abstract:PREMISE OF THE STUDY:Intertidal macroalgae must resist extreme hydrodynamic forces imposed by crashing waves. How does frond flexibility mitigate drag, and how does flexibility affect predictions of drag and dislodgement in the field? METHODS:We characterized flexible reconfiguration of six seaweed species in a recirc...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1100541
更新日期:2012-05-01 00:00:00
abstract::The evolutionary history of maize (Zea mays subsp. mays) is of general interest because of its economic and scientific importance. Here we show that many cellular traits described previously in developing caryopses of maize are also seen in its wild progenitor teosinte (Zea mays subsp. parviglumis). These features, ea...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.0900059
更新日期:2009-10-01 00:00:00
abstract::The interaction between simulated cotyledon herbivory and interspecific competition was studied in a greenhouse experiment using two species of trees, Acer rubrum and Quercus palustris, which commonly invade abandoned agricultural fields. Herbivory treatments were applied as a gradient of cotyledon removal for A. rubr...
journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2000-12-01 00:00:00
abstract:PREMISE OF THE STUDY:Discovery of cupulate ovules of Doylea tetrahedrasperma within a compact, compound seed cone highlights the rich diversity of fructification morphologies, pollination biologies, postpollination enclosure of seeds, and systematic diversity of Early Cretaceous gymnosperms. METHODS:Specimens were stu...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1600030
更新日期:2016-05-01 00:00:00
abstract::Lxm1-O, a dominant EMS (ethyl methanesulfonate) induced mutation in maize (Zea mays, Poaceae), was originally reported to affect the blade/sheath boundary over the midrib region of the leaf. Here we present a more extensive analysis of the Lxm phenotype in nine different inbred lines. Lxm leaves are longer and narrowe...
journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:1998-04-01 00:00:00
abstract:PREMISE OF THE STUDY:Microsatellite markers of an important medicinal plant, Eurycoma longifolia (Simaroubaceae), were developed for DNA profiling and genetic diversity studies. METHODS AND RESULTS:Eighteen polymorphic microsatellite loci were developed for E. longifolia. The primers were designed from a genomic libra...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1000469
更新日期:2011-05-01 00:00:00
abstract::Seedling establishment has long been believed to be rare on alpine tundra because of predicted life history trade-offs, the clonality of alpine species, and the harshness of the alpine climate. Contrary to the idea that seedlings are rare on alpine tundra, a 4-yr demographic study of seedlings at Niwot Ridge, Colorado...
journal_title:American journal of botany
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更新日期:2003-08-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:1998-07-01 00:00:00
abstract::Welwitschiaceae, a family in the Gnetales, is known today from only one extant species, Welwitschia mirabilis. This species is distributed in the Namibian desert, along the western coast of southern Africa, about 10 km inland from the coast. Very little is known about the fossil record of this family. Lower Cretaceous...
journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2005-08-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1600389
更新日期:2017-04-01 00:00:00
abstract::We assessed the effects of local environment on survival, growth, and development in six clones (genotypes) of Vallisneria americana grown at five sites in the Huron-Erie Corridor. Detrimental effects of local environment on plant performance (rate of clonal growth, leaf and root production, surface area of leaves and...
journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:1997-12-01 00:00:00
abstract::Understanding the role of mother plants as pollen recipients in shaping mating patterns is essential for understanding the evolution of populations and in particular to predict the consequence of habitat fragmentation. Here, we investigated variation in mating patterns due to maternal phenotypic traits, phenological v...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.93.11.1650
更新日期:2006-11-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.1002/ajb2.1061
更新日期:2018-03-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1100392
更新日期:2012-03-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.91.3.332
更新日期:2004-03-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.0900224
更新日期:2010-02-01 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:2011-02-01 00:00:00
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journal_title:American journal of botany
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更新日期:2020-02-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:2000-03-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.92.12.1935
更新日期:2005-12-01 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:2006-04-01 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:2008-03-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:2001-01-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1400166
更新日期:2014-05-01 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:2007-05-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:2000-06-01 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:2010-05-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:1997-07-01 00:00:00