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  1. Proceedings of the National Academy of Sciences, India Section B: Biological Sciences
  2. Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 84
  3. Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 84, Issue 1, March 2014
  4. Cytology as an Important Tool for Solving Evolutionary Problems in Angiosperms
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Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 87
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 86
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 85
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 84
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 84, Issue 4, December 2014
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 84, Issue 3, September 2014
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 84, Issue 2, June 2014
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 84, Issue 1, March 2014
Cytology as an Important Tool for Solving Evolutionary Problems in Angiosperms
Crimean-Congo Hemorrhagic Fever: Current Scenario in India
Growth Behaviour of Transgenic Cotton with Peanut Intercropping System Using Modified Fertilization Technique
Assay of Nutritional Composition and Antioxidant Activity of Three Dioecious Momordica Species of South East Asia
Down-Regulation of Acid and Alkaline Phosphatases Induced After Prolonged Diclofenac Use in Experimental Mouse Bone
Use of Molecular and Protein Based Markers for Accessing Genetic Diversity Among Hippophae salicifolia D. Don Genotypes of Uttarakhand
Identification of RAPD Markers Associated with Morphological, Biochemical and Ionomic Characteristics in Indian Tomato Genotypes
Sunlight Irradiation Induced Green Synthesis of Stable Silver Nanoparticles Using Citrus limon Extract
Bryophyte Invasion on Famous Archaeological Site of Ahom Dynasty ‘Talatal Ghar’ of Sibsagar, Assam (India)
Natural Products Modulate Eicosanoid Mediated Nodulation in Poekilocerus pictus Fab. (Acrididae, Orthoptera)
Feed Utilization, Gonadal Maturation, Carcass Composition and Stress of the Catfish, Heteropneustes fossilis (Bloch) Fed with Animal Viscera-Based Diets at Varied Temperatures
Comparative Pattern of Reproductive Traits in Labeo rohita (Hamilton 1822) from Six Tropical Rivers of Ganges Basin: A New Insight
Phenotypic Variations Among Three Populations of Chirruh Snowtrout, Schizothorax esocinus (Heckel, 1838) in Kashmir Himalaya with Insights from Truss Network System
Haemato-biochemical Responses in Cyprinus carpio (Linnaeus, 1758) Fry Exposed to Sub-lethal Concentration of a Phenylpyrazole Insecticide, Fipronil
Pattern of Meristic and Morphometric Variations Between Wild and Captive Stocks of Endangered Tor putitora (Hamilton 1822) Using Multivariate Statistical Analysis Methods
Organization and Classification of Cytochrome P450 Genes in Castor (Ricinus communis L.)
Effect of Bacillus subtilis Strain CKT1 as Inoculum on Growth of Tomato Seedlings Under Net House Conditions
Plant Growth Promoting and Metal Bioadsorption Activity of Metal Tolerant Pseudomonas aeruginosa Isolate Characterized from Uranium Ore Deposit
Afr1p Expression During Mitosis is Dependent on Mpk1p in Saccharomyces cerevisiae
RAPD and Nuclear rDNA ITS Polymorphism Within Macrophomina phaseolina Isolated from Arid Legumes of Western Rajasthan
Role of 24-Epibrassinolide, Putrescine and Spermine in Salinity Stressed Adiantum capillus-veneris Leaves
A Liquid Culture System for Improved Micropropagation of Mature Acacia nilotica (L.) Del. ssp. indica and Ex Vitro Rooting
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 83
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences : Volume 82

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Cytology as an Important Tool for Solving Evolutionary Problems in Angiosperms

Content Provider SpringerLink
Author Sharma, Namrata Sharma, Geeta
Copyright Year 2013
Abstract The usefulness and reliability of cytological methods for studying evolutionary problems has been recognized for a long time. Cytological characters used for determining similarities/differences between various taxa include chromosome number, their form and behaviour. While information on chromosome number pinpoints the role of numerical variations, karyotypic studies help in understanding the role of structural changes in the evolutionary process. Important karyotypic aspects used to evaluate relationships between different taxa include absolute/relative size of chromosomes, position of primary constrictions and number of chromosomes with nucleolus-organizing regions. While chromosomes of different size/form can be studied by simple squashing and solid staining techniques, for establishing relationship between taxa having uniform karyotypes, chromosome banding and fluorescence in situ hybridization techniques are employed. Putative grouping of chromosomes and their behaviour during reduction division has been used in many cases for determining base number, ploidy level, type of ploidy and also for detecting structural chromosomal changes that a taxon might have undergone during evolution. Information on chromosome pairing in allopolyploid crop plants also assist in elucidating the evolutionary phenomenon involved in their production. Despite the advantages conferred by chromosomal information, it has rarely been used as an independent indicator of relationships between different groups. It is because the phenotypic aspects of the chromosomes cannot be more informative than the expression of genes as seen in the morphology of a plant. For determining with great certainty the relationship between various taxa, chromosomes need to be viewed in conjunction with other aspects of an organism as breeding system, habit, morphology, distribution and biochemistry.
Starting Page 1
Ending Page 7
Page Count 7
File Format PDF
ISSN 03698211
Journal Proceedings of the National Academy of Sciences, India Section B: Biological Sciences
Volume Number 84
Issue Number 1
e-ISSN 22501746
Language English
Publisher Springer India
Publisher Date 2013-07-06
Publisher Place India
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Chromosome morphology Life Sciences Plant Biochemistry Nucleic Acid Chemistry Behavioural Sciences Chromosome number Cytology Evolution
Content Type Text
Resource Type Article
Subject Environmental Science Agricultural and Biological Sciences
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