Apomixis in Zephyranthes Texana Herb.

Brown, Wade H.

doi:10.1002/j.1537-2197.1951.tb14880.x

Cited by 14 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are records of populations of this species with 2 n = 40, 74, 80 and 85 (Blumenschein, ; Tanaka & Kamemoto, ). This range of variation is thought to reflect ancient combinations of genomes adjusted to apomixis (Brown, ; Szlachetko & Veyret, ). Many species previously included in the delimitation of E. nocturnum are actually distinct taxa, such as E. tridens Poepp.…”

Section: Discussionmentioning

confidence: 99%

Karyology of the genusEpidendrum(Orchidaceae: Laeliinae) with emphasis on subgenusAmphiglottiumand chromosome number variability inEpidendrum secundum

et al. 2013

View full text Add to dashboard Cite

Epidendrum is one of the largest Neotropical genera of Orchidaceae and comprises approximately 1500 species. Only 2.8% of these species have been studied cytologically, demonstrating chromosome numbers ranging from n = 12 in E. fulgens to n = 120 in E. cinnabarinum. The present work evaluated the evolution of the karyotypes of Epidendrum spp. based on data gathered from the literature and from analyses of the karyotypes of 16 Brazilian species (nine previously unpublished). The appearance of one karyotype with n = 12 with one larger chromosome pair in subgenus Amphiglottium appears to have occurred at the beginning of the divergence of this lineage, and x = 12 probably represents the basic number of this subgenus. Epidendrum secundum exhibits wide variation in chromosome numbers, with ten different cytotypes found in 22 Brazilian populations, seven of which were new counts: 2n = 30, 42, 50, 54, 56, 58 and 84. Most lineages of Epidendrum seem to have been secondarily derived from one ancestral stock with x = 20, as is seen in the majority of the present‐day representatives of the genus. © 2013 The Linnean Society of London, Botanical Journal of the Linnean Society, 2013, 172, 329–344.

show abstract

Section: Discussionmentioning

confidence: 99%

Karyology of the genusEpidendrum(Orchidaceae: Laeliinae) with emphasis on subgenusAmphiglottiumand chromosome number variability inEpidendrum secundum

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Sato on the basis of these data considers twenty-three as the basic set in the genus and the numbers, such as sixty, ninety, one hundred, are, according to him, the derived ones. The chromosome number of the allied genus Pancratium has been reported to be twenty-two and forty-four (Brumfield, 1941;Sato, 1938). The number eleven is considered as the basic number of the latter genus.…”

Section: Discussionmentioning

confidence: 99%

“…A study on the cause of sterility and its percentage too is highly desirable . It is significant that apomicts have been recorded in Zephyranthes (Brown, 1951) a genus , where such somatic irregularities have also been observed (Sharma & Ghosh l . c.).…”

Section: Discussionmentioning

confidence: 99%

A Cytological Study of a Few Genera of Amaryllidaceae with a View to Find out the Basis of Their Phylogeny

Sharma

Bal

1956

CYTOLOGIA

View full text Add to dashboard Cite

“…Hybridization and polyploidy have been traditionally invoked as major forces in the group's evolution (e.g., Flagg & Flory, ; Flory, ; Greizerstein & Naranjo, ). Additionally, apomixis has been documented in North American polyploid taxa (Flory, ; Brown, ), and the consequences of this have not been addressed critically in relation to the group's diversification. Self‐compatibility has been reported in several species and is probably more common than currently known (Meerow & Snijman, ; N. García, pers.…”

Section: Formal Taxonomymentioning

confidence: 99%

Generic classification of Amaryllidaceae tribe Hippeastreae

Garcı́a

Meerow

Arroyo-Leuenberger

et al. 2019

TAXON

View full text Add to dashboard Cite

A robust generic classification for Amaryllidaceae has remained elusive mainly due to the lack of unequivocal diagnostic characters, a consequence of highly canalized variation and a deeply reticulated evolutionary history. A consensus classification is proposed here, based on recent molecular phylogenetic studies, morphological and cytogenetic variation, and accounting for secondary criteria of classification, such as nomenclatural stability. Using the latest sutribal classification of Hippeastreae (Hippeastrinae and Traubiinae) as a foundation, we propose the recognition of six genera, namely Eremolirion gen. nov., Hippeastrum, Phycella s.l., Rhodolirium s.str., Traubia, and Zephyranthes s.l. A subgeneric classification is suggested for Hippeastrum and Zephyranthes to denote putative subclades. In Hippeastrum, we recognize H. subg. Hippeastrum and H. subg. Tocantinia. In Zephyranthes, Z. subg. Eithea, Z. subg. Habranthus, Z. subg. Myostemma (= core Rhodophiala clade), Z. subg. Neorhodophiala subg. nov., and Z. subg. Zephyranthes are recognized. Descriptions, synonymy, taxonomic keys, and new combinations are provided for each genus and subgenus.

show abstract

Apomixis in Zephyranthes Texana Herb.

Cited by 14 publications

References 14 publications

Karyology of the genusEpidendrum(Orchidaceae: Laeliinae) with emphasis on subgenusAmphiglottiumand chromosome number variability inEpidendrum secundum

Karyology of the genusEpidendrum(Orchidaceae: Laeliinae) with emphasis on subgenusAmphiglottiumand chromosome number variability inEpidendrum secundum

A Cytological Study of a Few Genera of Amaryllidaceae with a View to Find out the Basis of Their Phylogeny

Generic classification of Amaryllidaceae tribe Hippeastreae

Contact Info

Product

Resources

About