New Chromosome Numbers in Petaloid Monocotyledons and in Other Miscellaneous Angiosperms

Johnson, Margaret A. T.; Brandham, P. E.

doi:10.2307/4117845

Cited by 71 publications

(76 citation statements)

References 11 publications

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“…The chromosome numbers of L. orchioides var. orchioides was previously reported to be 2n=16 by de Wet (1957), 2n=16 and 17 by Moffett (1936), 2n=28 and 29 by Johnson and Brandham (1997). Thus, the chromosome count obtained in the present study supported those reported by Johnson and Brandham (1997).…”

Section: Resultssupporting

confidence: 83%

“…The karyotypes of L. juncifolia (2n = 22) and L. latifolia (2n = 24) shown commonly gradual decrease in size from the largest to the smallest chromosomes were classified in the Group 5. The karyotype system of Hamatani et al (2004) suggested to include another three groups in addition to the above five groups mentioned: The Group 6 was characterized by a bi-modal karyotype with two large chromosomes and the chromosome number of 2n=22, or that with four large chromosomes and the chromosome number of 2n=44; the Group 7 was characterized by a bimodal karyotype Brandham (1997). The chromosome numbers of those of the other 11 taxa studied verified the previous counts.…”

Section: Resultssupporting

confidence: 59%

“…Molecular studies using atpB and trnL-F DNA sequences and the shape of the seeds among those three genera were compared (emphasized) by Pfosser et al (2003). However, chromosomes of Massonia and Polyxena have been scarcely studied; e.g., only a few species of the two genera have documented their chromosome numbers by Johnson and Brandham (1997).…”

mentioning

confidence: 99%

“…Fifty-eight species and eight varieties in the genus have indicated the aneuploid series with chromosome numbers of 2n = 10, 12, 14, 16, 17, 18, 21, 22, 23, 24, 26, 27, 28, 29, 30, 32, 40, 42, and 56 (e.g., Moffett 1936;Fernandes and Neves 1962;Gows 1964;Ornduff and Watters 1978;Nordenstam 1982;Johnson and Brandham 1997;Hamatani et al 1998Hamatani et al , 2004. However, a few taxa have reported karyotypes; e.g., 12 species of the genus were grouped by their karyotypes using microtome sectioning by Moffett (1936); correlationship between variation in chromosome number and presence of B-chromosomes was studied by Francis and Liebenberg (1990); 25 species and three varieties of the genus were classified into eight groups by their karyotypes (Hamatani et al 1998(Hamatani et al , 2004.…”

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confidence: 99%

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Chromosome morphology of 12 species and one variety of Lachenalia and five species of closely related, allied genera (Liliaceae)

Hamatani¹,

Kondo

Kodaira

et al. 2007

Chromosome Botany

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ABSTRACT. Somatic chromosomes in 12 species and one variety of Lachenalia and their closely related, two species of Massonia and three species of Polyxena, all in the Liliaceae, were studied. The resting nuclei of all of the taxa studied were commonly classified as the round prochromosome type. The mitotic prophase chromosomes of the taxa studied were commonly classified as the proximal type. However, their chromosome numbers varied from 2n=14, 16, 18, 22, 24, 26 to 28. The chromosome numbers of 2n = 14 in Lachenalia algoensis, L. aloides 'Lutea', and L. longibracteata; 2n = 18 in L. latimerae; and 2n = 28 in Massonia pustulata and Polyxena longituba were reported here for the first time. The 13 taxa of Lachenalia studied were classified karyotypically into six groups. The two species of Massonia studied showed commonly the bimodal karyotype with four large chromosomes and the three species of Polyxena studied showed commonly the bimodal karyotype with three large chromosomes. The species of Massonia displayed much larger chromosomes at mitotic metaphase than those of the other two genera.

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Section: Resultssupporting

confidence: 83%

Section: Resultssupporting

confidence: 59%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Chromosome morphology of 12 species and one variety of Lachenalia and five species of closely related, allied genera (Liliaceae)

Hamatani¹,

Kondo

Kodaira

et al. 2007

Chromosome Botany

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“…Several counts have been carried out on different wild population of this species, which shown their chromosome number as 2nϭ2xϭ16 (Hindakova and Majovsky 1976, Kaul and Bakshsi 1984, Kuzmanov et al 1986, Volkova and Boyko 1986, Krasnikov and Lomonosova 1990, Wang 2000, Rabie et al 2003, Saedi et al 2006, Rotreklová et al 2004, Vallès et al 2003, nϭxϭ8 (Khatoon andAli 1993,Vallès et al 2008) and also 2nϭ16 to 2nϭ18 (Johnson and Brandham 1997). Our data is different from above mentioned reports but is accordance with some earlier report (Mendelak and Schweizer 1986, Yan et al 1989, Qiao et al 1990) and also our report about Zanjan population of Iran (Chehregani and Mehanfar 2008).…”

Section: Artemisia Incana (L) Drucementioning

confidence: 99%

New Chromosome Counts in some Species of the Genus Artemisia L. (Asteraceae) from Iran

et al. 2009

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Summary Chromosome counts of 6 populations of 4 species in the genus Artemisia from the family Asteraceae are reported. All taxa were collected from west provinces of Iran. Three species, Artemisia fragrance, A. spicigera and A. scoparia, were not accordance with previous counts. The most of studied taxa had the basic number xϭ9 with ploidy levels ranging from 2x to 8x, but A. incana had xϭ8. Both diploidy and triploidy were found for A. incana that can be regarded as the sign of new species generation. This is the first report for ploidy level 2nϭ8xϭ72 for A. spicigera.

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A new sectional classification of Lachenalia (Asparagaceae) based on a multilocus DNA phylogeny

Duncan

Schlichting

Forest

et al. 2022

TAXON

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Lachenalia (Asparagaceae; Scilloideae; Hyacintheae) is a large and morphologically diverse genus of more than 140 bulbous species endemic to southern Africa. Previous attempts to infer a well-resolved and robustly supported phylogeny of Lachenalia using Sanger sequencing of candidate loci and/or morphological characters have been largely unsuccessful. Consequently, the current infrageneric classification is artificial, and there is a need to explore alternative avenues to produce a phylogenetic classification. In this paper, we present a novel phylogenetic hypothesis for Lachenalia inferred using maximum likelihood and coalescent-based species tree estimation (ASTRAL) as applied to 378 hybrid-enrichment loci. Our tree is well resolved and well supported, providing strong support for a monophyletic radiation of the genus in southern Africa and a solid foundation for a revised infrageneric classification. The well-supported placement of L. isopetala Jacq. as sister to Lachenalia + Massonia supports the establishment of a new monotypic genus, Pseudolachenalia, to accommodate this species. Conversely, the inclusion of species previously classified as Polyxena within the Lachenalia clade supports the transfer of these species to Lachenalia. Within Lachenalia, the delimitation of subgenera and sections is complicated by the highly imbalanced character of the phylogeny and by the high levels of homoplasy shown by most morphological characters traditionally used to delimit species in this group. Nonetheless, we propose an infrageneric taxonomy comprising 10 morphologically distinct, monophyletic sections. The largest of these, L. sect. Lachenalia, is further divided into 13 more-or-less diagnosable, monophyletic subsections. Keys to the sections of Lachenalia, and to the subsections of L. sect. Lachenalia, are provided.

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New Chromosome Numbers in Petaloid Monocotyledons and in Other Miscellaneous Angiosperms

Cited by 71 publications

References 11 publications

Chromosome morphology of 12 species and one variety of Lachenalia and five species of closely related, allied genera (Liliaceae)

Chromosome morphology of 12 species and one variety of Lachenalia and five species of closely related, allied genera (Liliaceae)

New Chromosome Counts in some Species of the Genus Artemisia L. (Asteraceae) from Iran

A new sectional classification of Lachenalia (Asparagaceae) based on a multilocus DNA phylogeny

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