Chromosomal Criteria and Taxonomic Relationships in the Solanaceae.

Badr, Abdelfattah; Khalifa, S.F.; Aboel-Atta, A. I.; Abou-El-Enain, Maged Mahmoud

doi:10.1508/cytologia.62.103

Cited by 36 publications

(48 citation statements)

References 18 publications

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“…The present counts of chromosome number were convenient with previously reported counts in Datura innoxia of 2n=24 (Palomino et al 1988), D. stramonium of 2n=24 (Bir et al 1978;Hill 1995;Murín 1997;Badr et al 1997); Hyoscyamus albus L. of 2n=68 (Andreev 1981;Srivastava and Lavania 1987;Aboucaya and Verlaque 1990;Diosdado et al 1993;Badr et al 1997). Hyoscyamus muticus of 2n=28 (Srivastava and Lavania 1987;Tyagi and Dubey 1989;Misra et al 1991;Badr et al 1997 andMohamed 1997).…”

Section: Discussionsupporting

confidence: 90%

“…Only Bahl and Tyagi (1992) reported that H. muticus had 2n=30. Withania somnifera of 2n=36 considered as a new count and different from that was reported as 2n=48 (Bir and Neelam 1980;Renard et al 1983;Slavik et al 1993;Badr, et al 1997;Sundari et al 1999). The present count chromosome number of Solanum nigrum of 2n=72 was convenient with previously reported counts (Rao and Kumar 1980;Sidhu 1979;Symon 1981;Bir and Sidhu 1979;Probatova and Sokolovskaya 1981;Singh and Roy 1982;Bhiravamurty and Rethy 1983).…”

Section: Discussionsupporting

confidence: 49%

“…Hyoscyamus muticus of 2n=28 (Srivastava and Lavania 1987;Tyagi and Dubey 1989;Misra et al 1991;Badr et al 1997 andMohamed 1997). Only Bahl and Tyagi (1992) reported that H. muticus had 2n=30.…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

“…Chromosome counts of the Egyptian plant species have been received attention of many authors (e g., Amin 1972a, b;Badr 1995;Badr et al 1997;Mohamed 1997;. Some cytotaxonomic studies in the Solanaceae have been reported (Philomina 1980;Badr et al 1997;El-Nahas et al 2000). olecular markers provide useful information insight into the classifi cation which have been available for these several years and developed to overcome the problems associated with the morphological characters (Awashi et al 2004;Ruangadttapha et al 2007).…”

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confidence: 99%

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Cytogenetical and ecological studies of some wild congeneric species in the Solanaceae distributed in upper Egypt

2010

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ABSTRACT.Cytogenetical and ecological studies in some species of the Solanaceae were made in the Mediterranean-type ecosystem in Upper Egypt. The chromosome complement of Datura innoxia (2n=24) consisted of 24 median-centromeric chromosomes; that of D. stramonium (2n=24) consisted of 22 median-and two submedian-centromeric chromosomes; that of Hyoscyamus albus (2n=68) consisted of 62 median-and six submedian-centromeric chromosomes, that of H. muticus (2n=28) consisted of 21 median-and seven submedian-centromeric chromosomes; that of Withania somnifera (2n=36; new count) consisted of 27 median-and nine submedian-centromeric chromosomes; and that of Solanum nigrum (2n=72) consists of 68 median and four submedian-centromeric chromosomes. Thirty-three reproducible polymorphic bands were resulted after four RAPD-PCR primers; those bands were used for studying the genetics similarity among the species. Average similarity coeffi cient was ranged from 0.05 to 0.47. RAPD bands resulted after PCR: D. innoxia and D. stramonium showed fi ve bands each; H. albus and H. muticus showed two and one bands respectively; W. somnifera seven bands and S. nigrum showed 13 bands, different patterns were produced among congeneric species. Ionic status of hot water extract of the species revealed that Hyoscyamus species was more accumulated Na + and Ca ++ , while Datura species accumulated more K + and Mg ++ and W. somnifera and S nigrum were intermediate. These strategies of ionic accumulation were in relation to the different chromosome number of species, which might help for surviving the species in desert ecosystem.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 49%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Cytogenetical and ecological studies of some wild congeneric species in the Solanaceae distributed in upper Egypt

2010

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Evolutionary patterns of variations in chromosome counts and genome sizes show positive correlations with taxonomic diversity in tropical gingers

Xavier,

Yadav,

Gowda

2024

American J of Botany

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PremiseCytogenetic traits such as an organism's chromosome number and genome size are taxonomically critical as they are instrumental in defining angiosperm diversity. Variations in these traits can be traced to evolutionary processes such as polyploidization, although geographic variations across cytogenetic traits remain underexplored. In the pantropical monocot family Zingiberaceae (~1500 species), cytogenetic traits have been well documented; however, the role of these traits in shaping taxonomic diversity and biogeographic patterns of gingers is not known.MethodsA time‐calibrated Bayesian phylogenetic tree was constructed for 290 taxa covering three of the four subfamilies in Zingiberaceae. We tested models of chromosome number and genome size evolution within the family and whether lineage age, taxonomic diversity, and distributional range explain the variations in the cytogenetic traits. Tests were carried out at two taxonomic ranks: within Zingiberaceae and within genus Hedychium using correlations, generalized linear models and phylogenetic least square models.ResultsThe most frequent changes in chromosome number within Zingiberaceae were noted to be demi‐polyploidization and polyploidization (~57% of the time), followed by ascending dysploidy (~27%). The subfamily Zingiberoideae showed descending dysploidy at its base, while Alpinioideae showed polyploidization at its internal nodes. Although chromosome counts and genome sizes did not corroborate with each other, suggesting that they are not equivalent; higher chromosome number variations and higher genome size variations were associated with higher taxonomic diversity and wider biogeographic distribution.ConclusionsWithin Zingiberaceae, multiple incidences of polyploidization were discovered, and cytogenetic events appear to have reduced the genome sizes and increased taxonomic diversity, distributional ranges and invasiveness.

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Plant Systematics World

Stuessy¹

2009

TAXON

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Chromosomal Criteria and Taxonomic Relationships in the Solanaceae.

Cited by 36 publications

References 18 publications

Cytogenetical and ecological studies of some wild congeneric species in the Solanaceae distributed in upper Egypt

Cytogenetical and ecological studies of some wild congeneric species in the Solanaceae distributed in upper Egypt

Evolutionary patterns of variations in chromosome counts and genome sizes show positive correlations with taxonomic diversity in tropical gingers

Plant Systematics World

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