Karyological studies in some taxa of the genus Artemisia (Asteraceae)

1994 ◽  
Vol 72 (8) ◽  
pp. 1126-1135 ◽  
Author(s):  
Marian Oliva Brañas ◽  
Joan Vallès Xirau
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Karyotype Analysis ◽  
Chromosome Morphology ◽  
Morphology Evolution ◽  
Karyological Study ◽  
Geographic Origins ◽  
Different Populations ◽  
Basic Numbers ◽  
Diploid Populations

A karyological study of six taxa (eight populations) of the genus Artemisia L. from different geographic origins is presented. The work deals with chromosome number and morphometry. We found the two usual basic numbers in the genus: x = 9, the most common one (in two diploid, two hypotetraploid, one tetraploid and one hexaploid populations) and x = 8 (in two diploid populations). Detailed karyotype analysis allows us to group the different populations and to postulate relationships among them. Key words: Asteraceae, Anthemideae, Artemisia, cytotaxonomy, chromosome morphology, evolution.

scholarly journals Karyotype analysis with orcein and CMA in two species of Alocasia (Schott) G. Don (Araceae)

1970 ◽  
Vol 40 (1) ◽  
pp. 53-56 ◽  
Author(s):  
Syeda Sharmeen Sultana ◽  
Hosne Ara ◽  
Sheikh Shamimul Alam
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Karyotype Analysis ◽  
Chromosome Complement ◽  
Taxonomic Status ◽  
The Other ◽  
First Report ◽  
Total Length ◽  
Internet Information ◽  
Chromosomal Length

Alocasia fallax Schott and A. odora (Roxb.) Koch (Araceae) were investigated cytogenetically to confirm their taxonomic status. There is no report of 2n chromosome number for A. fallax in the available literature and internet information. Therefore the 2n chromosome number (2n = 28) found in this study is probably the first report for A. fallax. Alocasia odora showed exactly double 2n chromosome number (2n = 56) from A. fallax. In addition to chromosome number, the other karyotypic features of A. odora were exactly double for that of A. fallax. The centromeric formulae of A. fallax was 24 m + 4 sm whereas it is just double in A. odora. Total length of 2n chromosome complement of A. odora (62.58 μm) was almost double to A. fallax. The range of chromosomal length of the two species was almost same. Moreover, A. odora plant is much taller than A. fallax. All of these data suggests that A. odora might be an autotetraploid of A. fallax which in course of evolution had undergone some changes in GC-rich repeats. Key words: Alocasia; CMA; Karyotype analysis DOI: http://dx.doi.org/10.3329/bjb.v40i1.7998 Bangladesh J. Bot. 40(1): 53-56, 2011 (June)

Karyological study in fifteen Leucocoryne taxa (Alliaceae)

Biologia ◽  
2012 ◽  
Vol 67 (2) ◽  
Author(s):  
Paola Jara-Arancio ◽  
Pedro Jara-Seguel ◽  
Claudio Palma-Rojas ◽  
Gina Arancio ◽  
Raul Moreno
Keyword(s):  
Chromosome Number ◽  
Secondary Constriction ◽  
Chromosome Morphology ◽  
Chromosome Size ◽  
Chromosome Fusion ◽  
Karyological Study ◽  
Karyotype Asymmetry ◽  
Additional Chromosome ◽  
Karyotype Formula ◽  
Haploid Karyotype

AbstractThe karyotype of fifteen Leucocoryne taxa was studied, assessing characteristics such as chromosome morphology and size, secondary constriction location, and asymmetry level. Two groups of Leucocoryne taxa were described based on chromosome number (2n = 10 and 2n = 18) and karyotype asymmetry. The haploid karyotype formula for the group 2n = 10 was 3m + 2st (or 2t), whereas for the group 2n = 18 was 7m + 2st (or 2t). Such results corroborate the karyotype descriptions previously carried out for some taxa of the genus. Leucocoryne taxa showed a high resemblance in chromosome morphology, but inter-specific differences were found in mean chromosome size. These data and previous studies based on gross chromosome morphology support Crosa’s hypothesis, which suggests that the cytotype 2n = 10 is diploid and perhaps ancestral, whereas that the cytotype 2n = 18 is tetraploid but with an additional chromosome fusion being probably a derived status.

scholarly journals Karyotypic Study of seven Types of Impatiens balsamina L.

1970 ◽  
Vol 15 ◽  
pp. 147-152 ◽  
Author(s):  
USN Momtaz ◽  
G Kabir ◽  
MM Ud-deen ◽  
N Yasmin
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Secondary Constriction ◽  
Karyotype Analysis ◽  
Diploid Chromosome Number ◽  
Interphase Chromosome ◽  
Karyotypic Analysis ◽  
Total Frequency ◽  
Impatiens Balsamina ◽  
Karyotypic Study

Nuclear phenotype and chromosome characteristics of eight types of Impatiens balsamina L. were studied. The diploid chromosome number was found to be 2n=14 in all types of Impatiens balsamina. Interphase chromosome volume was found to range from 0.1665μ3 (violet type) to 0.3904 μ3 (red type). The maximum total chromatin length (24.73μm) was observed in pink type and minimum (11.70μm) in violet type. Maximum total frequency percent (50.00%) was found in both foreign types (red and violet) and minimum (48.03%) in violet type. The karyotype analysis revealed that there was no secondary constriction and sub-terminal chromosome in any of the seven types belonging to Impatiens balsamina. So, on the basis of karyotypic analysis the present findings indicated that all the types of Impatiens balsamina were of primitive nature. Key words: Karyotype, Nuclear phenotype, Impatiens balsamina L.   doi: 10.3329/jbs.v15i0.2155    J. bio-sci. 15: 147-152, 2007

Cytogenetic studies in the genus Artemisia L. (Asteraceae): fluorochrome-banded karyotypes of five taxa, including the Iberian endemic species Artemisia barrelieri Besser

1997 ◽  
Vol 75 (4) ◽  
pp. 595-606 ◽  
Author(s):  
Joan Vallès Xirau ◽  
Sonja Siljak-Yakovlev
Keyword(s):  
Key Words ◽  
Endemic Species ◽  
Diploid Species ◽  
Basic Number ◽  
Chromosome Morphology ◽  
Fluorochrome Banding ◽  
Tetraploid Species ◽  
Cytogenetic Studies ◽  
Two Populations ◽  
Basic Numbers

Fluorochrome-banded karyotypes of eight populations belonging to five taxa of the genus Artemisia from different European origins are presented. The most common basic number x = 9 is found in six populations of two diploid and two tetraploid species, whereas two populations of one diploid species have the less frequent basic number x = 8. The data on chromosome morphology and fluorochrome banding lead to some karyosystematic and evolutionary considerations, among others the postulation of descendent dysploidy to explain the occurrence of the two basic numbers in the genus. Key words: Asteraceae, Anthemideae, Artemisia, karyotypes, fluorochrome banding, cytotaxonomy, evolution.

scholarly journals Karyotype analysis in Chaerophyllum cicutaria Vill. with special emphasis on satellited chromosomes

2014 ◽  
Vol 56 (1) ◽  
pp. 61-72
Author(s):  
Włodzimierz Chojnacki ◽  
Jerzy Bohdanowicz
Keyword(s):  
Chromosome Number ◽  
Karyotype Analysis ◽  
Natural Populations ◽  
Chromosome Complement ◽  
Chromosome Morphology ◽  
Single Pair

Karyological studies were carried out on plants of <em>Chaerophyllum cicutaria (Umbelliferae)</em>, which came from both lowland and montane natural populations. The chromosome number in all the examined plants was 2n = 22 and their karyotypes, though similar in general, showed some minute but distinct differences. There was` a single pair of SAT chromosomes in the chromosome complement. They had compound satellites divided into two or three segments. Seven morphological types of SAT chromosomes differing in number and size of satellite segments were distinguished. With respect to SAT chromosome morphology, the species showed both intra- and interpopulational karyological variation.

scholarly journals Karyotype Analysis of Seven Varieties of Taro Colocasia esculenta (L.) Schott. from Bangladesh

1970 ◽  
Vol 16 ◽  
pp. 15-18 ◽  
Author(s):  
S Parvin ◽  
G Kabir ◽  
MM Ud-Deen ◽  
JK Sarker
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Somatic Chromosome ◽  
Karyotype Analysis ◽  
Colocasia Esculenta ◽  
Somatic Chromosome Number ◽  
Interphase Chromosome ◽  
Meristematic Cells

Nuclear and chromosome characteristics of seven varieties of Colocasia esculenta were studied. Interphase chromosome value was found to range from 2119.85 (cytotype-3) to 5346.12 (cytotype-7). Heterochromatin values varied from 23.17 (cytotype-2) to 44.52% (cytotypt-6) in meristematic cells. Karyotype studies revealed that somatic chromosome number was 28 in cytotype-1, 2, 5, 6 and 7; 42 in cytotype-3 and 21 in cytotype-4. The longest chromosome (5.54 μm) was observed in cytotyopt-2 and shortest (1.3 μm) in cytotype-3 and 6. Key words: Karyotype, Nuclear phenotype, Colocasia esculenta.   DOI:10.3329/jbs.v16i0.3735    J. bio-sci. 16: 15-18, 2008  

Chromosome morphology of Clematis, subsection Viornae (Ranunculaceae)

1976 ◽  
Vol 54 (10) ◽  
pp. 1135-1139 ◽  
Author(s):  
W. Michael Dennis
Keyword(s):  
Chromosome Number ◽  
Somatic Chromosome ◽  
Chromosome Complement ◽  
Chromosome Morphology ◽  
Terminal Region ◽  
Somatic Chromosome Number ◽  
Median Region ◽  
Acrocentric Chromosomes ◽  
Subterminal Region ◽  
Marked Stability

Cytological studies were made on the following taxa: C. addisonii, C. filifera, C. glaucophylla, C. pitcheri, C. reticulata, C. texensis, C. versicolor, and C. viorna. All species were found to have a somatic chromosome number of 16 with a uniform karyotype consisting of five pairs of metacentric chromosomes with centromeres in the median region and three pairs of acrocentric chromosomes, two pairs with centromeres in the terminal region and one pair with centromeres in the subterminal region. These findings agree with reports of chromosome number and karyotype for other species of Clematis and suggest a marked stability of chromosome complement in the genus.

scholarly journals Karyotype Analysis of Alnus Mill. (Betulaceae) Species Originating From Northeastern Asia

2010 ◽  
Vol 59 (1-6) ◽  
pp. 219-223 ◽  
Author(s):  
Liu Jun ◽  
Ren Bao-Qing ◽  
Luo Peigao ◽  
Ren Zhenglong
Keyword(s):  
Chromosome Number ◽  
Chromosome Numbers ◽  
Karyotype Analysis ◽  
Full Potential ◽  
Northeastern Asia ◽  
Ploidy Levels ◽  
Genetic Makeup ◽  
Fossil Records

Abstract Alnus Mill. (alder) is an ecologically valuable tree genus. It is essential to study its genetic makeup in order to use alder trees to their full potential. Five specimens from four Alnus species (A. mandshurica, A. pendula, A. sibirica, and A. sieboldiana), found in northeastern Asia, were subjected to karyotype analysis. The analysis showed that these tree samples could be divided into three categories based on chromosome numbers or ploidy levels: viz., 2n = (4x) = 28, 2n = (8x) = 56 and 2n = (16x) = 112. The differences in chromosome number and karyotype parameters among Alnus species and even within the same species possibly resulted from natural polyploidization. Comparing the chromosome numbers of Alnus species in China with those in Japan showed that there appear to be only two categories in China, whereas there are up to five categories in Japan. The earliest fossil records of Alnus pollen were also discovered in Japan. We conclude that the center origin of Alnus spp. is Japan rather than China.

scholarly journals A taxonomic revision of the genus Cleome L. (Capparaceae) in Bangladesh

1970 ◽  
Vol 14 (1) ◽  
pp. 25-36
Author(s):  
Hosne Ara ◽  
Bushra Khan ◽  
Md. Mansur-ul-Kadir Mia
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Geographical Distribution ◽  
Taxonomic Revision ◽  
Economic Importance ◽  
Plant Taxon

The available record of the genus Cleome L. for Bangladesh has been updated in this paper and includes C. diffusa, C. gynandra, C. hassleriana, C. rutidosperma and C. viscosa. The updating has been done in case of nomenclature with important synonyms, local names, description of the taxa along with illustrations, flowering and fruiting times, ecological notes, specimens examined and their geographical distribution. For identification of the species, a dichotomous bracketed key has been added in this paper. Information on chromosome number and economic importance have also been provided where available. Key words: Cleome, Taxonomic revision, Capparaceae, Bangladesh DOI: 10.3329/bjpt.v14i1.520 Bangladesh J. Plant Taxon. 14(1): 25-36, 2007 (June)

scholarly journals Karyotypes of three species of Hyperophora Brunner von Wattenwyl, 1878 (Tettigoniidae, Phaneropterinae) enable morphologically similar species to be distinguished

2019 ◽  
Vol 13 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Bruno Cansanção Silva ◽  
Lucas Henrique Bonfim Souza ◽  
Juliana Chamorro-Rengifo ◽  
Douglas Araujo
Keyword(s):  
Chromosome Number ◽  
Diploid Number ◽  
Sex Chromosome ◽  
Acrocentric Chromosome ◽  
Chromosome Morphology ◽  
Similar Species ◽  
Cerrado Biome ◽  
Cytogenetic Studies ◽  
Sex Chromosome System ◽  
The Difference

Phaneropterinae is the largest subfamily of Tettigoniidae, distributed across the globe. There are few cytogenetic studies regarding this group, as in the case of the genus group Aniarae, which represents only two karyotyped species. The current study aims to analyze cytogenetically three species of Hyperophora Brunner von Wattenwyl, 1878 from Brazil. The male diploid number of Hyperophoraminor Brunner von Wattenwyl, 1891 and Hyperophoramajor Brunner von Wattenwyl, 1878 is 2n♂= 31, whereas Hyperophorabrasiliensis Brunner von Wattenwyl, 1878 has shown 2n♂= 29. These three species possess an X0 sex chromosome system and telo/acrocentric chromosome morphology. The only species found in the Pantanal biome, H.brasiliensis, can be chromosomally distinguished from the Cerrado biome species H.major and H.minor, due to the difference in chromosome number (2n♂= 29 and 2n♂= 31, respectively).

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