A Predominance of Subtelocentric Chromosomes Characterizes the Karyotype of &lt;i&gt;Calliandra grandiflora&lt;/i&gt; (Fabaceae, Mimosoideae, Ingeae) and Its Karyosystematic Considerations

Tapia-Pastrana, Fernando; Uribe-Hernández, Alma

doi:10.1508/cytologia.84.367

CYTOLOGIA

2019

DOI: 10.1508/cytologia.84.367

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A Predominance of Subtelocentric Chromosomes Characterizes the Karyotype of Calliandra grandiflora (Fabaceae, Mimosoideae, Ingeae) and Its Karyosystematic Considerations

Fernando Tapia-Pastrana

Alma Uribe-Hernández

Abstract: The karyotype of Calliandra grandiflora from a population of Mexico is described. The karyotypic formula of 2n= 22= 4m+18st is the first for a species of the genus. The predominance of subtelocentric chromosomes (st) and the index of asymmetry (TF)=25.05 1.03 described an asymmetric karyotype not registered so far in the tribe Ingeae. The majority of the short arms in st chromosomes exhibited structures of similar appearance to the secondary constrictions, present even in the first pair, but not in the smalles… Show more

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Chromosomal Changes in Prosopis glandulosa var. torreyana (Honey Mesquite) Species Widely Distributed in North America

Tapia-Pastrana

2021

CYTOLOGIA

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A cytogenetic study using conventional surface-spread, air-dried, Giemsa-stained techniques were performed in somatic cells from six individuals of Prosopis glandulosa var. torreyana belonging to a population in northern Mexico. The results confirmed chromosome number 2n=28 and its karyotype generally consistent with that shown in other species of mimosoid whose karyotypes are characterized by a predominance of chromosomes with a medium or slightly displaced centromere and few subterminal centromeres. However, there were differences in chromosomal morphology concerning other Prosopis species involving chromosome size and the location, shape, and size of the satellites on the SAT chromosomes. The evidence of chromosomal remodeling, not previously described in this genus, favors its possible participation as a genetic isolation mechanism that would prevent the formation of viable hybrids, as has been recorded in other studies.

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Chromosomal Changes in Prosopis glandulosa var. torreyana (Honey Mesquite) Species Widely Distributed in North America

Tapia-Pastrana

2021

CYTOLOGIA

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Advances in Legume Systematics 14. Classification of Caesalpinioideae. Part 2: Higher-level classification

Bruneau,

de Queiroz,

Ringelberg

et al. 2024

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Caesalpinioideae is the second largest subfamily of legumes (Leguminosae) with ca. 4680 species and 163 genera. It is an ecologically and economically important group formed of mostly woody perennials that range from large canopy emergent trees to functionally herbaceous geoxyles, lianas and shrubs, and which has a global distribution, occurring on every continent except Antarctica. Following the recent re-circumscription of 15 Caesalpinioideae genera as presented in Advances in Legume Systematics 14, Part 1, and using as a basis a phylogenomic analysis of 997 nuclear gene sequences for 420 species and all but five of the genera currently recognised in the subfamily, we present a new higher-level classification for the subfamily. The new classification of Caesalpinioideae comprises eleven tribes, all of which are either new, reinstated or re-circumscribed at this rank: Caesalpinieae Rchb. (27 genera / ca. 223 species), Campsiandreae LPWG (2 / 5–22), Cassieae Bronn (7 / 695), Ceratonieae Rchb. (4 / 6), Dimorphandreae Benth. (4 / 35), Erythrophleeae LPWG (2 /13), Gleditsieae Nakai (3 / 20), Mimoseae Bronn (100 / ca. 3510), Pterogyneae LPWG (1 / 1), Schizolobieae Nakai (8 / 42–43), Sclerolobieae Benth. & Hook. f. (5 / ca. 113). Although many of these lineages have been recognised and named in the past, either as tribes or informal generic groups, their circumscriptions have varied widely and changed over the past decades, such that all the tribes described here differ in generic membership from those previously recognised. Importantly, the approximately 3500 species and 100 genera of the former subfamily Mimosoideae are now placed in the reinstated, but newly circumscribed, tribe Mimoseae. Because of the large size and ecological importance of the tribe, we also provide a clade-based classification system for Mimoseae that includes 17 named lower-level clades. Fourteen of the 100 Mimoseae genera remain unplaced in these lower-level clades: eight are resolved in two grades and six are phylogenetically isolated monogeneric lineages. In addition to the new classification, we provide a key to genera, morphological descriptions and notes for all 163 genera, all tribes, and all named clades. The diversity of growth forms, foliage, flowers and fruits are illustrated for all genera, and for each genus we also provide a distribution map, based on quality-controlled herbarium specimen localities. A glossary for specialised terms used in legume morphology is provided. This new phylogenetically based classification of Caesalpinioideae provides a solid system for communication and a framework for downstream analyses of biogeography, trait evolution and diversification, as well as for taxonomic revision of still understudied genera.

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A Predominance of Subtelocentric Chromosomes Characterizes the Karyotype of <i>Calliandra grandiflora</i> (Fabaceae, Mimosoideae, Ingeae) and Its Karyosystematic Considerations

Cited by 2 publications

References 26 publications

Chromosomal Changes in <i>Prosopis glandulosa</i> var. <i>torreyana</i> (Honey Mesquite) Species Widely Distributed in North America

Chromosomal Changes in <i>Prosopis glandulosa</i> var. <i>torreyana</i> (Honey Mesquite) Species Widely Distributed in North America

Advances in Legume Systematics 14. Classification of Caesalpinioideae. Part 2: Higher-level classification

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