Abstract:
:Siparunaceae comprise Glossocalyx with one species in West Africa and Siparuna with 65 species in the neotropics; all have unisexual flowers, and 15 species are monoecious, 50 dioecious. Parsimony and maximum likelihood analyses of combined nuclear ribosomal ITS and chloroplast trnL-trnF intergenic spacer sequences yielded almost identical topologies, which were used to trace the evolution of the two sexual systems. The African species, which is dioecious, was sister to all neotropical species, and the monoecious species formed a grade basal to a large dioecious Andean clade. Dioecy evolved a second time within the monoecious grade. Geographical mapping of 6,496 herbarium collections from all species sorted by sexual system showed that monoecy is confined to low-lying areas (altitude < 700 m) in the Amazon basin and southern Central America. The only morphological trait with a strong phylogenetic signal is leaf margin shape (entire or toothed), although this character also correlates with altitude, probably reflecting selection on leaf shapes by temperature and rainfall regimes. The data do not reject the molecular clock, and branch lengths suggest that the shift to dioecy in the lowlands occurred many million years after the shift to dioecy in the ancestor of the Andean clade.
journal_name
Syst Bioljournal_title
Systematic biologyauthors
Renner SS,Won Hdoi
10.1080/106351501753328820keywords:
subject
Has Abstractpub_date
2001-09-01 00:00:00pages
700-12issue
5eissn
1063-5157issn
1076-836Xjournal_volume
50pub_type
杂志文章abstract::Multigene families have provided opportunities for evolutionary biologists to assess molecular evolution processes and phylogenetic reconstructions at deep and shallow systematic levels. However, the use of these markers is not free of technical and analytical challenges. Many evolutionary studies that used the nuclea...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syt101
更新日期:2014-03-01 00:00:00
abstract::Correct rooting of the angiosperm radiation is both challenging and necessary for understanding the origins and evolution of physiological and phenotypic traits in flowering plants. The problem is known to be difficult due to the large genetic distance separating flowering plants from other seed plants and the sparse ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/sys070
更新日期:2013-01-01 00:00:00
abstract::In recent years, there has been controversy whether multidimensional data such as geometric morphometric data or information on gene expression can be used for estimating phylogenies. This study uses simulations of evolution in multidimensional phenotype spaces to address this question and to identify specific factors...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa003
更新日期:2020-09-01 00:00:00
abstract::Mouse lemurs (Microcebus) are a radiation of morphologically cryptic primates distributed throughout Madagascar for which the number of recognized species has exploded in the past two decades. This taxonomic revision has prompted understandable concern that there has been substantial oversplitting in the mouse lemur c...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa053
更新日期:2020-07-08 00:00:00
abstract::We investigate the impact of past climates on plant diversification by tracking the "footprint" of climate change on a phylogenetic tree. Diversity within the cosmopolitan carnivorous plant genus Drosera (Droseraceae) is focused within Mediterranean climate regions. We explore whether this diversity is temporally link...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/1063515060081570
更新日期:2006-10-01 00:00:00
abstract::Young polyploid events are easily diagnosed by various methods, but older polyploid events become increasingly difficult to identify as chromosomal rearrangements, tandem gene or partial chromosome duplications, changes in substitution rates among duplicated genes, pseudogenization or locus loss, and interlocus intera...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150590945359
更新日期:2005-06-01 00:00:00
abstract::The spatial distribution of biomes has changed considerably over deep time, so the geographical opportunity for an evolutionary lineage to shift into a new biome may depend on how the availability and connectivity of biomes has varied temporally. To better understand how lineages shift between biomes in space and time...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa045
更新日期:2021-01-01 00:00:00
abstract::Anthozoan cnidarians (corals and sea anemones) include some of the world's most important foundation species, capable of building massive reef complexes that support entire ecosystems. Although previous molecular phylogenetic analyses have revealed widespread homoplasy of the morphological characters traditionally use...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa103
更新日期:2021-01-28 00:00:00
abstract::Sequence divergence for segments of three mitochondrial DNA (mtDNA) genes encoding the 12S and 16S ribosomal RNA and cytochrome b was examined in newts belonging to the genus Euproctus (E. asper, E. montanus, E. platycephalus) and in three other species belonging to the same family (Salamandridae), Triturus carnifex, ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/46.1.126
更新日期:1997-03-01 00:00:00
abstract::How should characters and taxa be sampled to resolve efficiently the phylogeny of ancient and highly speciose groups? We addressed this question empirically in the treefrog family Hylidae, which contains > 800 species and may be nonmonophyletic with respect to other anuran families. We sampled 81 species (54 hylids an...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150500234625
更新日期:2005-10-01 00:00:00
abstract::Evolutionary events co-occurring along phylogenetic trees usually point to complex adaptive phenomena, sometimes implicating epistasis. While a number of methods have been developed to account for co-occurrence of events on the same internal or external branch of an evolutionary tree, there is a need to account for th...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw004
更新日期:2016-09-01 00:00:00
abstract::Phylogenomic analyses have helped resolve many recalcitrant relationships in the angiosperm tree of life, yet phylogenetic resolution of the backbone of the Leguminosae, one of the largest and most economically and ecologically important families, remains poor due to generally limited molecular data and incomplete tax...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa013
更新日期:2020-07-01 00:00:00
abstract::Performance measures of phylogenetic estimation methods such as accuracy, consistency, and power are an attempt at summarizing an ensemble of a given estimator's behavior. These summaries characterize an ensemble behavior with a single number, leading to a variety of definitions. In particular, the relationships betwe...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/106351598261021
更新日期:1998-03-01 00:00:00
abstract::The Amazon and neighboring South American river basins harbor the world's most diverse assemblages of freshwater fishes. One of the most prominent South American fish families is the Serrasalmidae (pacus and piranhas), found in nearly every continental basin. Serrasalmids are keystone ecological taxa, being some of th...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syaa065
更新日期:2020-08-12 00:00:00
abstract::Evolutionary relationships have remained unresolved in many well-studied groups, even though advances in next-generation sequencing and analysis, using approaches such as transcriptomics, anchored hybrid enrichment, or ultraconserved elements, have brought systematics to the brink of whole genome phylogenomics. Recent...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syz030
更新日期:2020-01-01 00:00:00
abstract::Whereas examples of insular speciation within the endemic-rich Macaronesian hotspot flora have been documented, the phylogeography of recently evolved plants in the region has received little attention. The Macaronesian red fescues constitute a narrow and recent radiation of four closely related diploid species distri...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150802302450
更新日期:2008-10-01 00:00:00
abstract::We present a phylogenetic hypothesis and novel, rank-free classification for all extant species of softshell turtles (Testudines:Trionychidae). Our data set included DNA sequence data from two mitochondrial protein-coding genes and a approximately 1-kb nuclear intron for 23 of 26 recognized species, and 59 previously ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150490503053
更新日期:2004-10-01 00:00:00
abstract::Significant phylogenetic codivergence between plant or animal hosts (H) and their symbionts or parasites (P) indicates the importance of their interactions on evolutionary time scales. However, valid and realistic methods to test for codivergence are not fully developed. One of the systems where possible codivergence ...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150802172184
更新日期:2008-06-01 00:00:00
abstract::Polyploidy, the duplication of entire genomes, plays a major role in plant evolution. In allopolyploids, genome duplication is associated with hybridization between two or more divergent genomes. Successive hybridization and polyploidization events can build up species complexes of allopolyploids with complicated netw...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150701424553
更新日期:2007-06-01 00:00:00
abstract::Conifer-feeding sawflies in the genus Neodiprion provide an excellent opportunity to investigate the origin and maintenance of barriers to reproduction, but obtaining a phylogenetic estimate for comparative studies of Neodiprion speciation has proved difficult. Specifically, nonmonophyly within and discordance between...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150802580949
更新日期:2008-12-01 00:00:00
abstract::Following (1) the large-scale molecular phylogeny of seed plants based on plastid rbcL gene sequences (published in 1993 by Chase et al., Ann. Missouri Bot. Gard. 80:528-580) and (2) the 18S nuclear phylogeny of flowering plants (published in 1997 by Soltis et al., Ann. Missouri Bot. Gard. 84:1-49), we present a phylo...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/49.2.306
更新日期:2000-06-01 00:00:00
abstract::Although concerns are being raised about a potential shortage of taxonomists and systematists, recent analyses suggest instead that the number of researchers involved in taxonomic descriptions is higher than ever and that the average number of new species described annually per taxonomist has declined in recent decade...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syw053
更新日期:2016-11-01 00:00:00
abstract::Even though relationships within Annelida are poorly understood, Eunicida is one of only a few major annelid lineages well supported by morphology. The seven recognized eunicid families possess sclerotized jaws that include mandibles and a maxillary apparatus. The maxillary apparatuses vary in shape and number of elem...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150500354910
更新日期:2006-02-01 00:00:00
abstract::We collected ~29 kb of sequence data using Roche 454 pyrosequencing in order to estimate the timing and pattern of diversification in the carnivorous pitcher plant Sarracenia alata. Utilizing modified protocols for reduced representation library construction, we generated sequence data from 86 individuals across 10 po...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/sys048
更新日期:2012-10-01 00:00:00
abstract::When doing a bootstrap analysis with a single tree saved per pseudoreplicate, biased search algorithms may influence support values more than actual properties of the data set. Two methods commonly used for finding phylogenetic trees consist of randomizing the input order of species in multiple addition sequences foll...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syu051
更新日期:2014-11-01 00:00:00
abstract::All methods proposed to date for mapping landmark configurations on a phylogenetic tree start from an alignment generated by methods that make no use of phylogenetic information, usually by superimposing all configurations against a consensus configuration. In order to properly interpret differences between landmark c...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syr119
更新日期:2012-05-01 00:00:00
abstract::The Noah's Ark Problem (NAP) is a comprehensive cost-effectiveness methodology for biodiversity conservation that was introduced by Weitzman (1998) and utilizes the phylogenetic tree containing the taxa of interest to assess biodiversity. Given a set of taxa, each of which has a particular survival probability that ca...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/10635150600873876
更新日期:2006-08-01 00:00:00
abstract::Gene trees record the combination of gene-level events, such as duplication, transfer and loss (DTL), and species-level events, such as speciation and extinction. Gene tree-species tree reconciliation methods model these processes by drawing gene trees into the species tree using a series of gene and species-level eve...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syt054
更新日期:2013-11-01 00:00:00
abstract::Horizontal gene transfer (HGT) is one of the main mechanisms driving the evolution of microorganisms. Its accurate identification is one of the major challenges posed by reticulate evolution. In this article, we describe a new polynomial-time algorithm for inferring HGT events and compare 3 existing and 1 new tree com...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1093/sysbio/syp103
更新日期:2010-03-01 00:00:00
abstract::All current phylogenetic methods assume that DNA substitutions are independent among sites. However, ample empirical evidence suggests that the process of substitution is not independent but is, in fact, temporally and spatially correlated. The robustness of several commonly used phylogenetic methods to the assumption...
journal_title:Systematic biology
pub_type: 杂志文章
doi:10.1080/106351599260319
更新日期:1999-06-01 00:00:00