scholarly journals Karyotypic and Morphometric Analysis of A Predatory Rove Beetle, Paederus littoralis (Coleoptera: Staphylinidae) from Jammu Region of Outer Himalayas, India

2018 ◽  
Vol 15 (2) ◽  
pp. 495-499
Author(s):  
Arshad Ayoub Bhatti ◽  
Manvi Khajuria
Keyword(s):  
Chromosome Number ◽  
Y Chromosome ◽  
Morphometric Analysis ◽  
Sex Chromosomes ◽  
Diploid Chromosome Number ◽  
Cereal Aphids ◽  
Rove Beetle ◽  
The Family ◽  
Telocentric Chromosomes ◽  
Chromosomal Data

In the present study, the chromosomes of a predatory rove beetle Paederus littoralis were studied from Jammu region of outer Himalayas. These beetles are also potential bio-control agents in suppressing the populations of cereal aphids. The diploid chromosome number was found to be 2n=32 including 22 metacentric, 3 submetacentric, 6 subtelocentric and 1 telocentric chromosomes. The sex chromosomes (Xyp) included submetacentric X and telocentric y chromosome. Meiotic observations comprised diplotene, diakinesis and metaphase-I. The study is helpful in solving taxonomic problems with in the family Staphylinidae and it authenticates the existence of this particular species through chromosomal data.

First Record on Sex Chromosomes in a Species of the Family Cynodontidae: Cynodon gibbus (Agassiz, 1829)

2020 ◽  
Vol 160 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Vanessa S. Pinheiro Figliuolo ◽  
Leonardo Goll ◽  
Patrik Ferreira Viana ◽  
Eliana Feldberg ◽  
Maria C. Gross
Keyword(s):  
Chromosome Number ◽  
Repetitive Dna ◽  
Sex Chromosomes ◽  
First Record ◽  
Diploid Chromosome Number ◽  
Fish Family ◽  
Female Heterogamety ◽  
The Family

The fish family Cynodontidae belongs to the superfamily Curimatoidea, together with the Hemiodontidae, Serrasalmidae, Parodontidae, Prochilodontidae, Chilodontidae, Curimatidae, and Anostomidae. The majority of the species of this superfamily that have been analyzed to date have a diploid chromosome number of 2n = 54. Differentiated sex chromosomes (with female heterogamety) have been observed only in the Prochilodontidae, Parodontidae, and Anostomidae. The present study provides the first description of differentiated sex chromosomes in the cynodontid species Cynodon gibbus, which has a ZZ/ZW system, and shows that repetitive DNA has played a fundamental role in the differentiation of these sex chromosomes.

New cytogenetic data on Coreoidea (Hemiptera: Heteroptera) with special reference to Coreidae

Zootaxa ◽  
2012 ◽  
Vol 3313 (1) ◽  
pp. 53 ◽  
Author(s):  
HAILIN YANG ◽  
HU LI ◽  
XUN DAI ◽  
JIAN CHANG ◽  
WANZHI CAI
Keyword(s):  
Chromosome Number ◽  
Special Reference ◽  
Sex Chromosomes ◽  
Meiotic Division ◽  
Phylogenetic Relationships ◽  
Male Meiosis ◽  
Point Of View ◽  
Diploid Chromosome Number ◽  
Holokinetic Chromosomes ◽  
The Family

Some cytogenetic aspects of six Chinese species of Coreoidea were studied. The material included five species from the familyCoreidae: Hydarella orientalis (Distant), Homoeocerus bannaensis Hsiao, Cletus graminis Hsiao & Cheng, Paradasynus lon-girostris Hsiao, Acanthocoris scaber (Linnaeus), and one species from the family Stenocephalidae: Stenocephalus femoralisReuter. All species show holokinetic chromosomes, post-reductional meiotic division of XO sex chromosomes, a pre-reduc-tional type of meiosis for autosomes and m-chromosomes, intersticial chiasmata in most autosomes, and one chiasma per biva-lent in male meiosis. In the species studied, the diploid chromosome number ranged from 13 to 21. It was 13 in S. femoralis (10+ 2m + XO), 15 in Hy. orientalis (12 + 2m + XO), 17 in Ho. bannaensis (14 + 2m + XO) and C. graminis (14 + 2m + XO), 19in P. longirostris (16 + 2m + XO), and 21 in A. scaber (18 + 2m + XO). Hy. orientalis represents the first cytogenetically stud-ied species in subfamily Hydarinae. The phylogenetic relationships among Coreoidea are briefly discussed from a cytogenetic point of view.

The Chromosomes of 4 Genera of Possums From the Family Petauridae (Marsupialia, Diprotodonta)

1990 ◽  
Vol 38 (1) ◽  
pp. 33 ◽  
Author(s):  
JD Murray ◽  
SC Donnellan ◽  
GM Mckay ◽  
RH Rofe ◽  
PR Baverstock ◽  
...  
Keyword(s):  
Chromosome Number ◽  
Sex Chromosomes ◽  
Chromosome Numbers ◽  
Chromosomal Rearrangement ◽  
Diploid Chromosome Number ◽  
The Family ◽  
Relationship Of ◽  
The Relationship ◽  
Petaurus Australis

The standard and C-banded (four species) karyotypes of six species of the family Petauridae (Gymnobelideus leadbeateri, Petaurus australis, P. breviceps, P. norfolcensis, Dactylopsila trivirgata and Dactylonax palpator) are described. The G-banded karyotype of P. norfolcensis is also described. Gymnobelideus and Petaurus have diploid chromosome number of 22. All three species of Petaurus have a similar karyotype, consisting of biarmed autosomes and very small sex chromosomes, which differs from Gymnobelideus by a minimum of one chromosomal rearrangement of each autosome. Dactylopsila and Dactylonax have similar karyotypes with diploid chromosome numbers of 18. The relationship of these two genera to Petaurus is still uncertain but all members of this family differ from Pseudocheiridae in the small size of the sex chromosomes.

scholarly journals One more Microtus species with asynaptic sex chromosomes

2018 ◽  
Vol 70 (3) ◽  
pp. 443-447
Author(s):  
Jelena Blagojevic ◽  
Marija Rajicic ◽  
Vladimir Jovanovic ◽  
Tanja Adnadjevic ◽  
Ivana Budinski ◽  
...  
Keyword(s):  
Chromosome Number ◽  
Sex Chromosomes ◽  
Diploid Chromosome Number ◽  
First Finding ◽  
Chromosomal Polymorphisms ◽  
Southeastern Serbia

Arvicoline voles are known as a karyotypically extremely polymorphic group in which the genus Microtus leads with the highest rate of karyotype change. A member of this genus, the European pine vole Microtus subterraneus (de Selys-Longchamps, 1836), is widely distributed in Europe and parts of Asia. There are two cytotypes differing in diploid chromosome number, 2n=54 and 52, each showing different chromosomal polymorphisms. At two localities in southeastern Serbia, Mt. Jastrebac and Vlasina, we found the 2n=52 cytotype. Meiotic preparations from males revealed the presence of asynaptic sex chromosomes. Although asynaptic sex chromosomes are frequent in Microtus, this is the first finding for M. subterraneus. From summarized data it appears that two-thirds of the studied species, mainly from Microtus and Terricola subgenera, possess asynaptic sex chromosomes.

KARYOLOGICAL RELATIONSHIPS IN TURTLES (REPTILIA: CHELONIA)

1972 ◽  
Vol 14 (4) ◽  
pp. 859-868 ◽  
Author(s):  
A. Dean Stock
Keyword(s):  
Chromosome Number ◽  
Sex Chromosomes ◽  
Mitotic Chromosomes ◽  
Meiotic Chromosomes ◽  
Telocentric Chromosomes ◽  
Chromosome Karyotype

The mitotic chromosomes of 33 species of chelonians representing 22 genera and six families were investigated. Chromosome number and morphology are the same for most members of a given family and range from 66 in Trionyx to 34 in Pelomedusa. Most emydid genera have 50 chromosomes. The karyotype of Chelydra (2n = 52) is similar to those of some testudinid and emydid genera and is unlike the 56 chromosome karyotype of kinosternid turtles. The three genera of tortoises examined, Gopherus, Testudo, and Geochelone, have 52 chromosomes, but Gopherus differs in karyotypic details. The karyotype of Geochelone is like that of Chelydra and the 52 chromosome genera of emydid turtles. The African pleurodiran Pelomedusa has three additional pairs of small acrocentric or telocentric chromosomes not present in the earlier described karyotype of Podocnemis. Examination of meiotic chromosomes revealed frequencies of chiasmata formation similar to those reported earlier. Sex chromosomes were not distinguishable.

B-chromosome Systems in the Greater Glider (Petauroides volans volans) (Marsupialia : Petauridae). I. B-chromosome Distribution

1985 ◽  
Vol 38 (1) ◽  
pp. 189 ◽  
Author(s):  
Leon R McQuade
Keyword(s):  
Bone Marrow ◽  
Chromosome Number ◽  
Y Chromosome ◽  
Stable Equilibrium ◽  
Bone Marrow Cells ◽  
B Chromosome ◽  
B Chromosomes ◽  
Diploid Chromosome Number ◽  
Body Tissues ◽  
Distinct Distribution

Variations in diploid chromosome number, due to the presence of B chromosomes, are found within the distribution of P. v. volans. B chromosomes vary in number between one and eight per animal, are mitotically stable in various body tissues and, unlike the Y chromosome in male P. v. volans, are not eliminated from bone marrow cells. Animals possessing B chromosomes have a distinct distribution, and it appears that a stable equilibrium between the forces of B chromosome accumulation or elimination is operating in those populations possessing these chromosomes.

Cytogenetic studies on Sauria (Reptilia). I. Mitotic chromosomes of the Agamidae

1988 ◽  
Vol 9 (3) ◽  
pp. 301-310 ◽  
Author(s):  
E. Solleder ◽  
M. Schmid
Keyword(s):  
Chromosome Number ◽  
Chromosome Morphology ◽  
Mitotic Chromosomes ◽  
Metaphase Chromosomes ◽  
Banding Patterns ◽  
The Family ◽  
Telocentric Chromosomes ◽  
Cytogenetic Studies ◽  
Pericentric Inversions ◽  
Dna Organization

The karotypes of nine species of the family Agamidae were analyzed with various banding techniques and conventional cytogenetic stainings. Whereas the examined species of the genera Calotes and Leiolepis exhibit conservative karyotypes, the chromosome number and chromosome morphology varies considerably within the genus Agama. This is attributed to centric fusions between telocentric chromosomes and pericentric inversions within the chromosomes. None of the species demonstrated multiple quinacrine banding patterns in the euchromatic segments of the metaphase chromosomes. This is probably due to the special DNA organization in these organisms.

The chromosomes of Metachirus nudicaudatus (Marsupialia : Didelphidae)

1973 ◽  
Vol 21 (3) ◽  
pp. 369 ◽  
Author(s):  
E Yunis ◽  
J Cayon ◽  
E Ramirez
Keyword(s):  
Chromosome Number ◽  
Y Chromosome ◽  
Sex Chromosomes ◽  
Evolutionary History ◽  
Meiotic Chromosome ◽  
Staining Technique ◽  
Pachytene Stage ◽  
Apparent Lack ◽  
Heterochromatin Staining ◽  
Metachirus Nudicaudatus

A karyologic study of M. nudicaudatus, carried out on three females and five males, shows a chromosome number of 14, with apparent lack of dimorphism in the sex chromosomes. Nevertheless, the heterochromatin staining technique reveals the Y chromosome to be fully heteropycnotic. The meiotic chromosome has a sex vesicle at the pachytene stage. The similarity of this karyotype with those of Caluromys derbianus and Dromiciops australis is striking, especially considering that the genera belong to two subfamilies separated early in their evolutionary history. Our results support the opinion of Hayman and Martin that the original chromosome number in Marsupialia was 14.

scholarly journals First Report on Karyotypic, Morphometric and Meiotic Analysis of a Predatory Bombardier Beetle Pherosophus catoirai (Coleoptera: Carabidae) from Jammu region of Outer Himalayas, India

2021 ◽  
Vol 18 (4) ◽  
pp. 817-822
Author(s):  
Arshad Ayoub Bhatti ◽  
Nidhi Slathia ◽  
Manvi K
Keyword(s):  
Chromosome Number ◽  
Y Chromosome ◽  
X Chromosome ◽  
Chromosome Complement ◽  
Diploid Chromosome Number ◽  
Meiotic Analysis ◽  
Chromosome Y ◽  
First Report ◽  
Metaphase Stage ◽  
Spermatogonial Metaphase

Chromosomal studies and manual karyotyping are the aged techniques for determining the identity of a species on evolutionary scale; however, these techniques are simple, reliable and inexpensive to authenticate the existence of a particular species. In the present work, the chromosome complement and meiotic processes of a predatory bombardier beetle Pherosophus catoirai were investigated. This species presented 2n=35 as diploid chromosome number and the chromosomal formula was found to be 12m+8sm+12st+X0. Sex mechanism was X0 type with metacentric X chromosome. Y chromosome was absent in this species. Karyotype revealed small chromosomes except X chromosome which is found to be largest in the spermatogonial metaphase stage. Meiotic stages were pachytene, diplotene, diakinesis and metaphase-I. Present study may find importance to analyse evolution of chromosomes in order Coleoptera particularly in family Carabidae.

scholarly journals Karyotypes of three species of marine catfishes from Brazil

1994 ◽  
Vol 42 (1-2) ◽  
pp. 55-61 ◽  
Author(s):  
Vicente Gomes ◽  
Van Ngan Phan ◽  
Maria José de Arruda Campos Rocha Passos
Keyword(s):  
Chromosome Number ◽  
Giemsa Staining ◽  
Diploid Chromosome Number ◽  
The Family

The chromosomes of three species of fishes belonging to the family Ariidae -Netuma barba, Genidens genidens and Amis parkeri - were studied after conventional Giemsa staining. All three species have a diploid chromosome number of 2n = 56. The karyotype comprises 18 metacentric (m), 18 submetacentric (sm), 18 subtelocentric (st) and 2 telocentric (t) pairs for N. barba; 12 m, 20 sm, 20 st and 41 pairs for G. genidens; 16 m, 16 sm, 22 st and 21 pairs for A. parkeri. The results obtained from these three species are compared with each other and with those found in literature.

Sign in / Sign up

Export Citation Format

Share Document