H.A. Ansari

ORCID: 0009-0009-9455-5384
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About
Contact & Profiles
Research Areas
  • Genetic Mapping and Diversity in Plants and Animals
  • Genetic and phenotypic traits in livestock
  • Animal Genetics and Reproduction
  • Chromosomal and Genetic Variations
  • Cancer-related molecular mechanisms research
  • Genetic diversity and population structure
  • RNA Research and Splicing
  • Genomics and Chromatin Dynamics
  • RNA modifications and cancer
  • Legume Nitrogen Fixing Symbiosis
  • Molecular Biology Techniques and Applications
  • Plant pathogens and resistance mechanisms
  • Milk Quality and Mastitis in Dairy Cows
  • Agronomic Practices and Intercropping Systems
  • Plant Reproductive Biology
  • Parasitic infections in humans and animals
  • Plant nutrient uptake and metabolism
  • dental development and anomalies
  • Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
  • Yeasts and Rust Fungi Studies
  • Connexins and lens biology
  • Neurological diseases and metabolism
  • Medicinal Plant Pharmacodynamics Research
  • Urticaria and Related Conditions
  • Psychosomatic Disorders and Their Treatments

Dr. D. Y. Patil Medical College, Hospital and Research Centre
2023

AgResearch
1993-2019

Massey University
1997

Palmerston North Hospital
1991-1994

Roosevelt Institute
1993

University of Colorado Anschutz Medical Campus
1993

ETH Zurich
1990

Institute of Plant Genetics, Polish Academy of Sciences
1990

University of Zurich
1988

Hokkaido University
1986-1988

By using three gene probes, one derived from the porcine major histocompatibility complex (MHC) and two bovine cytokeratin genes, type I (KRTA) II (KRTB), hypothesis of conservation genome structure in members family Bovidae was examined. Gene mapping data revealed MHC to be chromosome region 23q15→q23 cattle (BOLA) 20q15→q23 sheep (OLA). KRTA localized 19q25→q29 11q25→q29 KRTB 5q14→q22 3q14→q22 sheep. The banding patterns arms which loci were assigned identical both species. Moreover,...

10.1159/000133131 article EN Cytogenetic and Genome Research 1991-01-01

Chromosome banding studies allowed us to distinguish the sex chromosomes of emu (<i>Dromaius novaehollandiae</i>), American rhea (<i>Rhea americana</i>), and Darwin’s (<i>Pterocnemia pennata</i>). In each species, we identified Z chromosome which is very similar a carinate Z, slightly smaller W chromosome. Contrary uniformly heterochromatic counterpart, ratite euchromatic retains remarkable homology

10.1159/000132545 article EN Cytogenetic and Genome Research 1988-01-01

This appears to be the first reported case of a bull with balanced autosomal reciprocal translocation associated azoospermia. The analysis includes somatic chromosome banding, conventional meiotic analysis, and electron microscopy synaptonemal complexes (SCs). karyotype was found 60, XY, rcp(8;13)(ql l;q24). Electron SCs in microspread pachytene spermatocytes revealed high incidence terminal asynapsis smallest arm quadrivalent. Most quadrivalents such few nonhomologous synapsis showed...

10.1159/000133453 article EN Cytogenetic and Genome Research 1993-01-01

Revised G-, Q- and R-banded karyotypes ideograms for sheep chromosomes at the 420-band level of resolution are presented. The positions landmark bands on defined by their distance relative to centromere facilitate comparison with equivalent cattle chromosomes. Chromosome-specific (reference) molecular markers that have been mapped proposed. Reference will genome comparisons between minimise confusion due chromosome nomenclature. Numbering Robertsonian translocation remains as previously reported.

10.1159/000015286 article EN Cytogenetic and Genome Research 1999-01-01

Trifolium nigrescens Viv. and T. occidentale Coombe are diploid (2 n = 2 x 16) clover species with contrasting habits geographic distributions. is a nonstoloniferous annual widespread distribution in the Mediterranean countries of Europe northern Africa, Turkey, Middle East, Caucasus region. By contrast, stoloniferous perennial strictly coastal, occurring on Gulf Stream coasts Portugal, Spain, France, Ireland, United Kingdom. Here we report for first time that both ssp. petrisavii can be...

10.2135/cropsci2007.05.0295 article EN Crop Science 2008-01-01

In gene mapping, it is obviously essential that assignment errors are minimized. Recently, confusion has arisen in sheep as a result of contradictions chromosome nomenclature. The purpose this brief communication, prepared by the International Sheep Karyotype Standardization Committee, to minimize any further may arise, while new standard Q, G and R karyotypes ideograms being prepared. This paper reviews history previous karyotype standards, explains have been detected presents correlation...

10.1159/000133809 article EN Cytogenetic and Genome Research 1994-01-01

Chromosome banding homologies were studied between the domestic chicken, <i>Gallus domesticus </i>(Galliformes), and budgerigar, <i>Melopsittacus undulatus </i>(Psittaciformes). In spite of large karyological differences, G-banding patterns found to be conserved a considerable extent two species. There some differences in C- Hoechst 33258/Q-banding patterns.

10.1159/000132290 article EN Cytogenetic and Genome Research 1986-01-01

Revised G-, Q- and R-banded karyotypes ideograms for sheep chromosomes at the 420-band level of resolution are presented. The positions landmark bands on defined by their distance relative to centromere facilitate comparison with equivalent cattle chromosomes. Chromosome-specific (reference) molecular markers that have been mapped proposed. Reference will genome comparisons between minimise confusion due chromosome nomenclature. Numbering Robertsonian translocation remains as previously reported.

10.1159/000015380 article EN Cytogenetic and Genome Research 1999-01-01

Summary The regional localization of five reference loci to sheep chromosomes is reported. newly mapped are the T‐cell receptor, beta ( TCRB ), coagulation factor X F10 laminin gamma 1 LAMC1 cyclic GMP rod phosphodiesterase, alpha PDEA ) and fibroblast growth 2 FGF2 ). assignments 5q23–q31 12q22–q24 respectively provide first markers physically assigned these chromosomes. They also allow provisional assignment syntenic group U19 chromosome 5 U1 12. mapping 17q23–q25 anchors unassigned...

10.1111/j.1365-2052.1995.tb03157.x article EN Animal Genetics 1995-06-01

Using a chromosomally characterized minipanel of sheep × hamster cell hybrids, five new loci, including carbonic anhydrase II (CA2), calbindin 1 (28 kDa) (CALB1), corticotropin releasing hormone (CRH), cytochrome P450 11B subfamily XIB (steroid-11-β-hydroxylase), polypeptide (CYP11B1), and interleukin 7 (IL7), have been assigned to chromosome 9. A homolog mosome 9 as the equivalent cattle 14 indicates that CALB1, CYP11B1, IL7, which not mapped on genome, are likely be present 14. It also...

10.1159/000133900 article EN Cytogenetic and Genome Research 1995-01-01

We report two new Robertsonian centric fusions, designated t<sub>4</sub>and t<sub>5</sub>, in New Zealand Romney sheep. Q- and G-banding studies show that sheep chromosomes 5 8 are fused t<sub>4</sub> 22 t<sub>5</sub>. The presence of large blocks centromeric heterochromatin t<sub>4 </sub>and t<sub>5</sub>suggests the fusions may be recent origin.

10.1159/000133814 article EN Cytogenetic and Genome Research 1994-01-01

Summary Five new loci, myogenic factor 5 (MYF5), complement 1 receptor (CIR), myosin‐like heavy chain (MYHL), islet amyloid polypeptide (IAPP), and alpha‐2‐macroglobulin (A2MR), were mapped onto sheep chromosome 3q by Southern hybridization to a panel of chro‐mosomally characterized × hamster cell hybrid lines. The location the triose phosphate isomerase (TPI1) gene one nucleolar organizer regions (RNR) on was confirmed analysis. This study provides further evidence for existence large...

10.1111/j.1365-2052.1993.tb00354.x article EN Animal Genetics 1993-12-01
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