Abstract:
:Fluorescence in situ hybridization (FISH) of a large-insert genomic clone, BAC 22B2, previously suggested that Sorghum bicolor (2n = 20) has the tetraploid architecture A(b)A(b)B(b)B(b). Here, we report on BAC 22B2 subclone pCEN38 (1047-bp insert) as related to sorghum and sugarcane. Mitotic FISH of six different subclones of BAC 22B2 showed that pCEN38 produced the strongest specificity to the A(b) subgenome and signal occurred primarily near centromeres. Southern blots of pCEN38 to 21 crop plants revealed a narrow taxonomic distribution. Meiotic metaphase I FISH positioned pCEN38 sequences near active centromeres. Pachytene FISH revealed that the distributions are trimodal in several B(b) and possibly all sorghum chromosomes. DNA sequencing revealed that the pCEN38 fragment contains three tandemly repeated dimers (<280 bp) of the same sequence family found in sorghum clone pSau3A10, and that each dimer consists of two divergent monomers (<140 bp). Sequence comparisons revealed homology between the pCEN38 monomers and the SCEN 140 bp tandem repeat family of sugarcane. FISH of pCEN38 yielded signal in centromere regions of most but not all sugarcane chromosomes. Results suggest that sugarcane and sorghum share at least one ancestor harboring elements similar to pCEN38 and SCEN and that each species had an ancestor in which the repetitive element was weakly present or lacking.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Zwick MS,Islam-Faridi MN,Zhang HB,Hodnett GL,Gomez MI,Kim JS,Price HJ,Stelly DMsubject
Has Abstractpub_date
2000-12-01 00:00:00pages
1757-64issue
12eissn
0002-9122issn
1537-2197pii
87/12/1757journal_volume
87pub_type
杂志文章abstract:UNLABELLED: PREMISE OF THE STUDY:Polyploid speciation has been important in plant evolution. However, the conditions that favor the origination and persistence of polyploids are still not well understood. Here, we examine origins of 16 polyploid species in Mentzelia section Trachyphytum. • METHODS:We used phylogeny r...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.0900388
更新日期:2010-09-01 00:00:00
abstract::A spatially explicit, reiterative algorithm (SERA) is presented and used to predict multiple aspects of plant population and community dynamics. Using simple physical principles and empirically derived relationships, SERA provides an analytical venue to test alternative hypotheses about individual functional traits go...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.0900063
更新日期:2009-08-01 00:00:00
abstract::Terrestrial plant leaves are complex structures of composite materials. Resistance to fracture is achieved by a number of mechanisms, which operate at the molecular, cell, tissue, and structural levels. Leaves of dicots have different venation patterns and cell wall volume fractions from those of grasses, and conseque...
journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2006-10-01 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:2009-12-01 00:00:00
abstract::Climate changes during glacial periods have had significant effects on the present geographic distribution of plant species. To elucidate the evolutionary history of a plant species with a disjunctive distribution, we investigated the geographic distribution patterns of cpDNA haplotypes in Photinia glabra (Rosaceae) g...
journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2006-12-01 00:00:00
abstract::In a recent study (American Journal of Botany 97: 730-737), we described the first case of a tripartite association in natural conditions among a holoparasitic plant (Cytinus), its host Cistaceae species, and mycorrhizal fungi at an anatomical level. In a letter to the editor, Brundrett (American Journal of Botany 98:...
journal_title:American journal of botany
pub_type: 评论,杂志文章
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更新日期:2011-04-01 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:2010-12-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.93.9.1357
更新日期:2006-09-01 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:1998-05-01 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:2012-05-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1100083
更新日期:2011-09-01 00:00:00
abstract:PREMISE OF THE STUDY:Although our awareness of ploidy diversity has expanded with the application of flow cytometry, we still know little about the extent to which cytotypes within mixed-ploidy populations are genetically differentiated across environmental gradients. METHODS:To address this issue, we reared 14 popula...
journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1500146
更新日期:2016-01-01 00:00:00
abstract:PREMISE OF THE STUDY:Little is known about the effect of environmental conditions on seed dormancy break at the community level or how it could be affected by climate change. This study tested the effects of storage conditions on germination of 489 species from high-elevation natural grasslands on the Tibet Plateau. M...
journal_title:American journal of botany
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doi:10.3732/ajb.1000043
更新日期:2011-01-01 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:2014-11-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1200643
更新日期:2013-10-01 00:00:00
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journal_title:American journal of botany
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doi:10.3732/ajb.1000226
更新日期:2011-05-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.1002/ajb2.1423
更新日期:2020-02-01 00:00:00
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journal_title:American journal of botany
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更新日期:2009-12-01 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:2003-06-01 00:00:00
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journal_title:American journal of botany
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更新日期:2013-03-01 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:2010-12-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.1002/j.1537-2197.1993.tb13838.x
更新日期:1993-05-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:2001-07-01 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:2017-07-01 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:1999-10-01 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:1998-02-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.93.8.1140
更新日期:2006-08-01 00:00:00