Kelly P Steele

Arizona State University | ASU · College of Letters and Sciences

Medicago truncatula is a model legume that has been extensively investigated in diverse subdisciplines of plant science. Medicago littoralis can interbreed with M. truncatula and M. italica; these three closely related species form a clade, i.e. TLI clade. Genetic studies have indicated that M. truncatula accessions are heterogeneous but their taxo...

The genus Medicago (Leguminosae, Papilionoideae) contains about 90 species including the important forage crop alfalfa Medicago sativa and the genomic model Medicago truncatula . Despite intensive research on the genus because of its agricultural importance, there is a relative lack of information about chromosome number and genome size in some Med...

Plant nuclear genomes harbor sequence elements derived from the organelles (mitochondrion and plastid) through intracellular gene transfer (IGT). Nuclear genomes also show a dramatic range of repeat content, suggesting that any sequence can be readily amplified. These two aspects of plant nuclear genomes are well recognized but have rarely been lin...

Background Previous studies exploring sequence variation in the model legume, Medicago truncatula, relied on mapping short reads to a single reference. However, read-mapping approaches are inadequate to examine large, diverse gene families or to probe variation in repeat-rich or highly divergent genome regions. De novo sequencing and assembly of M....

The classification of the legume family proposed here addresses the long-known non-monophyly of the traditionally recognised subfamily Caesalpinioideae, by recognising six robustly supported monophyletic subfamilies. This new classification uses as its framework the most comprehensive phylogenetic analyses of legumes to date, based on plastid matK...

The classification of the legume family proposed here addresses the long-known non-monophyly of the traditionally recognised subfamily Caesalpinioideae, by recognising six robustly supported monophyletic subfamilies. This new classification uses as its framework the most comprehensive phylogenetic analyses of legumes to date, based on plastid matK...

Legume systematists have been making great progress in understanding evolutionary relationships within the Leguminosae (Fabaceae), the third largest family of flowering plants. As the phylogenetic picture has become clearer, so too has the need for a revised classification of the family. The organization of the family into three subfamilies and 42...

The Leguminosae, the third-largest angiosperm family, has a global distribution and high ecological and economic importance. We examine how the legume systematic research community might join forces to produce a comprehensive phylogenetic estimate for the ca. 751 genera and ca. 19,500 species of legumes and then translate it into a phylogeny-based...

Genome-scale data offer the opportunity to clarify phylogenetic relationships that are difficult to resolve with few loci, but they can also identify genomic regions with evolutionary history distinct from that of the species history. We collected whole-genome sequence data from 29 taxa in the legume genus Medicago, then aligned these sequences to...

Unlabelled: Premise of the study: The genus Medicago, with about 87 species, includes the model legume species M. truncatula, and a number of important forage species such as M. sativa (alfalfa), M. scutellata (snail medic), and M. lupulina (black medic). Relationships within the genus are not yet sufficiently resolved, contributing to difficult...

Tribes Trifolieae and Vicieae along with Cicereae and Galega (Galegeae) form a monophyletic group that has been designated informally as the "vicioid clade". There is good support from analyses of various molecular data for the clade itself, but relationships of genera within the clade are not fully understood nor has monophyly of the tribes and ge...

Abstract Molecular phylogenies ,provide ,a framework ,to discuss ,relationships ,in the ,vast temperate herbaceous radiation of papilionoid legumes comprised of tribes Galegeae, Carmichaelieae, Cicereae, Hedysareae, Trifolieae, Vicieae, as well as among some members of the tropical tribe Millettieae (Callerya, Wisteria, and related genera). The tax...

Phylogenetic relationships were examined within the "higher" Hamamelididae using 21 species representing eight families and related outgroups. Chloroplast DNA sequences encoding the matK gene (/1 kilobase) provided 258 informative nucleotide sites. Phylogenetic analysis of this variation produced one most parsimonious tree supporting three monophyl...

Nucleotide sequences of the plastid encoded gene matK were examined for their potential utility in phylogenetic analyses within angiosperm families. Sequences 661 bases in length were obtained from twenty species of Polemoniaceae. Phylogenetic analyses resulted in four equally parsimonious trees with a consistency index of 0.70. Several well suppor...

Elimination of compensating substitutions in portions of 5S rRNA sequences that exhibit secondary structure and scoring of common gaps as homologous characters affects both the topology of phylogenetic estimates within green plants and measures of their reliability. Allowing for a transition / transversion bias, on the other hand, has little affect...

Genome size in flowering plants has been correlated with various aspects of life history, rarity and geographic distribution. To consider these hypotheses in the genus Medicago we obtained genome size estimates for 49 species (over half of the species in the genus) representing all major lineages using standard methods of flow cytometry performed o...