scholarly journals Cytomorphological diversity of Ageratum Species from North-West India.

2016 ◽  
Vol 5 (03) ◽  
pp. 1289
Author(s):  
Arneet Gill ◽  
Puja Garg*
Keyword(s):  
Diploid Number ◽  
Leaf Shape ◽  
Flower Colour ◽  
Male Meiosis ◽  
Chromosome Count ◽  
North India ◽  
First Report ◽  
North West

Ageratum belongs to tribe Eupatoriae of family Asteraceae. In the present study floristic forays revealed the prevalence of two species of the genus in North India namely, A. conyzoides and A. houstonianum. Two morphovariants were observed in both the species. The plants were found to differ on the basis of leaf shape and flower colour. Further, analysis of male meiosis revealed the presence of three cytotypes of A. conyzoides and two cytotypes of A. houstonianum. The specimens of A. conyzoides with purple flowers were found to have chromosome count of n=10 (diploid cytotype, 2x) and rarely plants with chromosome count of 2n=30 (triploid cytotype, 3x) were also observed. This is the first report of 3x plants of A. conyzoides from wild. The white flowered plants were found to be tetraploid with n=20. In the specimens of A. houstonianum, the diploid number n=10 was found in white flowered plants while tetraploid number n=20 was found in purple flowered plants. The meiotic course varies from normal to abnormal in some populations of both the species.

First Report of Botrytis cinerea Pers. on Salicornia bigelovii Torr. in North-West México

2013 ◽  
Vol 162 (7-8) ◽  
pp. 513-515 ◽  
Author(s):  
Edgar O. Rueda Puente ◽  
Luis G. Hernandez Montiel ◽  
Jaime Holguin Peña ◽  
Bernardo Murillo Amador ◽  
Francisco J. Rivas Santoyo
Keyword(s):  
Botrytis Cinerea ◽  
First Report ◽  
North West ◽  
Salicornia Bigelovii ◽  
West Mexico

scholarly journals Genetic and functional characterization of HIV-1 Vif on APOBEC3G degradation: First report of emergence of B/C recombinants from North India

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Larance Ronsard ◽  
Rameez Raja ◽  
Vaishali Panwar ◽  
Sanjesh Saini ◽  
Kumaravel Mohankumar ◽  
...  
Keyword(s):  
Functional Characterization ◽  
North India ◽  
First Report ◽  
Hiv 1

scholarly journals Genomic Insight Into 21 Hypervariable Molecular Markers in The Population of Lower Himalayan Geographical Province Himachal Pradesh, India

2021 ◽  
Author(s):  
Arun Sharma ◽  
Ankit Srivast ◽  
Vivek Sahajpal ◽  
R Kumawat ◽  
Shivani Dixit ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Central India ◽  
Himachal Pradesh ◽  
Genomic Diversity ◽  
Himalayan Region ◽  
North India ◽  
Mountain Range ◽  
Genetic Affinity ◽  
Discrimination Power ◽  
North West

Abstract A natural geographical barrier between Tibetan plateau and south Asian countries, the Himalayan Mountain range, serves as a natural barrier between these regions for genetic flow. This has lead to vast genomic divergence among the population residing in Indian Himalayan region..This study was designed with an aim to decipher the genomic diversity and molecular characterization of 21 hypervariable molecular markers in the population of geographical province of Himachal Pradesh in the lower Himalayan region. Randomly selected 401 unrelated individuals native of the lower Himalayan geographical region were included for this study. 21 hypervariable molecular markers included in the PowerPlex® 21 system were amplified and genotyped. A total of 246 alleles and 12.3 (SE 0.927) private alleles per locus were observed. Population differentiation analysis revealed that the studied population showed a genetic affinity with the population of North India, North-west India, Central India, and Uttar Pradesh rather than the population of East India, South India, East Asia, and West Asia. Heterozygosity at the studied loci was found in the range of 0.686 to 0.920. The unite discrimination power (PD) and exclusion power (PE) was found to be 1 and 0.999999998073765 respectively. The unite value of matching probability and typical paternity index was found to be 9.33x10-26 and 5.05x108 respectively for the studied population. All the tested loci were found in Hardy Weinberg Equilibrium (HWE) expectations. Overall the studied population exhibited a great extent of genomic diversity and had a greater genetic affinity with Indo-European speakers rather than Dravidian and Tibeto-Burman speakers.

Insects found in birds’ nests from Argentina: cytogenetic studies in Cimicidae (Hemiptera) and its taxonomical and phylogenetic implications

Zootaxa ◽  
2009 ◽  
Vol 2315 (1) ◽  
pp. 39-46 ◽  
Author(s):  
MARIA G. POGGIO ◽  
MARIA J. BRESSA ◽  
ALBA G. PAPESCHI ◽  
OSVALDO DI IORIO ◽  
PAOLA TURIENZO
Keyword(s):  
Chromosome Number ◽  
Diploid Number ◽  
Karyotype Evolution ◽  
Male Meiosis ◽  
Phylogenetic Implications ◽  
Cytogenetic Studies

The Cimicidae (Hemiptera) are known to be blood ectoparasites primarily on birds and bats. Three species of the subfamily Haematosiphoninae are known from Argentina: Acanthocrios furnarii, Ornithocoris toledoi, and Psitticimex uritui; all feed on diverse avian hosts. The chromosome number and male meiosis of A. furnarii, and P. uritui from new Argentinean samples are analyzed and compared with previous data. The sample of A. furnarii described by Ueshima (1966) with 2n = 32 + XY (male), strikingly differs from the present results (2n = 10 + XY, male). The diploid number of P. uritui agree with the previously reported by Ueshima (1966), 2n = 28 + X 1 X 2 Y (male). Taxonomical implications about the identity of A. furnarii are discussed and the mechanisms of the karyotype evolution of species belonging to Haematosiphoninae are proposed.

scholarly journals Burials from Cemetery Wad Ben Naga C260 – First Report

2020 ◽  
Vol 41 (2) ◽  
pp. 155-167
Author(s):  
Gabriela Jungová
Keyword(s):  
Archaeological Site ◽  
Enamel Hypoplasia ◽  
Porotic Hyperostosis ◽  
First Report ◽  
North West ◽  
The North ◽  
Cribra Orbitalia ◽  
Linear Enamel Hypoplasia ◽  
Grave Goods

During the sixteenth–eighteenth excavation seasons, cemetery WBN C260 at the archaeological site of Wad Ben Naga (Sudan) yielded the remains of fourteen individuals, both adult and non-adult. The burials, tentatively dated as post-Meroitic/Christian, were oriented to the north or north-west, with scarce grave goods, simple substructures, and no identified superstructures. Anthropological analysis revealed non-specific signs of stress including porotic hyperostosis and cribra orbitalia, linear enamel hypoplasia, and endocranial lesions known as serpens endocrania symmetrica.

scholarly journals The high frequency of variegated forms after in vitro mutagenesis in Saintpaulia ionantha Wendl.

2014 ◽  
Vol 65 (3-4) ◽  
pp. 339-343 ◽  
Author(s):  
Marek Gaj ◽  
Małgorzata D. Gaj
Keyword(s):  
Leaf Shape ◽  
Leaf Explants ◽  
Flower Colour ◽  
Control Culture ◽  
In Vitro Mutagenesis ◽  
Saintpaulia Ionantha ◽  
Treated Culture ◽  
Morphological Variants ◽  
Different Doses

The leaf-explants of <em>Saintpaulia ionantha</em> Wendl. var.'miniature' were treated by different doses of MNH and cultured on shoot regeneration medium. A strong toxic effect of some MNH doses on explant survival during the first two subcultures was noticed. The explants surviving treatment regenerated shoots with the efficiency comparable to the control. The high number of shoots regenerated from mutagenised leaves showed chlorophyll chimerism (so-called variegated forms). The use of 5 mM MNH for 1.5 or 2 h was found very effective, as 100% of survived explants regenerated variegated shoots. Besides hundreds of variegated forms also leaf-shape and flower-colour variants were observed in MNH-treated culture. Somaclonal variation was not observed in the control culture. The results indicate the great efficiency of <em>in vitro</em> applied MNH for in-duction of morphological variants of Saintpaulia, and especially variegated forms.

scholarly journals Taxonomic status of Pelargonium reniforme Curt.

Bothalia ◽  
2014 ◽  
Vol 44 (1) ◽  
Author(s):  
Janine E. Victor ◽  
Mmamphe Aphane
Keyword(s):  
Conservation Status ◽  
Leaf Shape ◽  
Flower Colour ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Herbarium Specimens ◽  
Current Investigation ◽  
Petiole Length ◽  
Pelargonium Sidoides ◽  
Variable Species

Background: Pelargonium reniforme Curt. is a morphologically variable species that many authors have attempted to split or combine. Confusion relating to the differences between the two subspecies currently included under P. reniforme has impeded attempts to assess their conservation status.  Pelargonium reniforme is closely related to  Pelargonium sidoides;  the two species are indistinguishable when not flowering and their distributions overlap in some areas.Objectives: With this study, we aimed to clarify the taxonomic status of the two subspecies of P. reniforme, which has relevance in terms of their conservation status.Method: Leaf shape, petiole length, internode length and flower colour were assessed by studying herbarium specimens of the two subspecies of  P. reniforme and specimens of P. sidoides. Living specimens of the two subspecies were also examined in their natural habitat.Results: The current investigation showed that the morphological characters used to distinguish the two subspecies of P. reniforme are too variable to separate them. Variation in some morphological characters may be related to environmental conditions.Conclusion: The recognition of the two subspecies of P. reniforme as distinct taxa is no longer justified.

scholarly journals SNOW COVER AND GLACIER DYNAMICS STUDY USING C-AND L-BAND SAR DATASETS IN PARTS OF NORTH WEST HIMALAYA

2018 ◽  
Vol XLII-5 ◽  
pp. 375-382 ◽  
Author(s):  
P. K. Thakur ◽  
V. Garg ◽  
B. R. Nikam ◽  
S. Singh ◽  
A. Chouksey ◽  
...  
Keyword(s):  
Snow Cover ◽  
Time Series Data ◽  
North India ◽  
Series Data ◽  
North West ◽  
Seasonal Snow ◽  
West Himalaya ◽  
Glacier Dynamics ◽  
Sar Data ◽  
Glacier Velocity

<p><strong>Abstract.</strong> The seasonal snow cover and permanent ice in form of Himalayan glaciers provide fresh water to many perineal rivers of Himalayas. The melt water from seasonal snow and glaciers, especially during of 15 March to 15 June acts as important source of water for drinking, hydropower and irrigation requirements of many areas in North India. This work has highlights the use of C-band Synthetic Aperture Radar (SAR) data from RISAT-1, Sentinel-1A and 1B satellites and ALOS-PALSAR-2 PolInSAR data for snow cover and glacier dynamics study for parts of North West Himalaya. Glacier velocity was derived using InSAR based method using 6 day temporal interval images from Sentinel-1 satellites and 14 day interval for PALSAR-2 satellite. High coherence was obtained for main glacier in both the data sets, which resulted accurate line of site (LOS) glacier velocity estimates for test glaciers. These InSAR data glacier velocity results are obtained after a gap of 21 years. Glacier facies was estimated using multi-temporal SAR image composition based classification. All these maps were verified by extensive ground surveys done at these sites during 2014–2017. The time series data of C-band SAR in VV/VH polarisation was also used to map snow cover in test basins of Bhagirathi and Beas River. The VV/VH data clearly shows difference between dry and wet snow, thus helping in improved snow cover mapping using SAR data. This study will help in refining algorithms to be used for such studies using upcoming NASA-ISRO SAR (NISAR) mission.</p>

Two new species of Pelargonium (Geraniaceae) from the Western and Northern Cape Provinces (South Africa) and their position within P. section Hoarea

Phytotaxa ◽  
2021 ◽  
Vol 516 (1) ◽  
pp. 92-100
Author(s):  
ELIZABETH M. MARAIS ◽  
ANSO LE ROUX
Keyword(s):  
South Africa ◽  
New Species ◽  
Leaf Shape ◽  
Flower Colour ◽  
Flower Structure ◽  
Winter Rainfall ◽  
Two New Species ◽  
Northern Cape ◽  
Flower Type ◽  
Rainfall Region

Pelargonium hammansbergense and P. roseopetalum are described as new species. Both are deciduous geophytes with turnip-shaped tubers belonging to P. section Hoarea. These two species share spathulate petals with narrow cuneate claws.  However, they differ in leaf shape, flower colour and markings on the petals. Their flower structure corresponds to that of P. aridicola, P. hirtipetalum, P. pubipetalum, P. reflexipetalum and P. tripalmatum. The seven species are compared with regard to the flower and leaf morphology, palynology and chromosome numbers. They all occur in the winter rainfall region along the west coast of South Africa. The two new species described here are illustrated and a key for the identification of the seven species with a P. aridicola flower type is included.

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