نتایج جستجو برای: karyotype asymmetry

تعداد نتایج: 45539  

ژورنال: :مجله گیاهشناسی ایران 2009
فیروزه بردبار حجت الله سعیدی محمد رضا رحیمی نژاد

از آنجا که گندم نان (t. aestivum) دارای ژنوم d می باشد، دارندگان ژنوم d از جنس aegilops، می تواند به عنوان منبع آللی مفید قابل انتقالی به گندم نان مورد استفاده قرار گیرد. در این تحقیق نحوه تقارن کاریوتایپی دارندگان ژنوم d از جنس aegilops و نیز گونه t. aestivum، جهت بررسی ارتباطات تکاملی آنها مورد بررسی قرار گرفته است. در حدود 11 جمعیت متعلق به هفت گونه دارنده ژنوم d برای این بررسی مورداستفاده ق...

2013
Lorenzo Peruzzi Halil E. Eroğlu

One of the most popular, cheap and widely used approaches in comparative cytogenetics - especially by botanists - is that concerning intrachromosomal and interchromosomal karyotype asymmetry. Currently, there is no clear indication of which method, among the many different ones reported in literature, is the most adequate to infer karyotype asymmetry (especially intrachromosomal), above all in ...

Journal: :International journal of advanced research 2021

Crinum asiaticum L. and latifolium are members of the family Amaryllidaceae. Karyomorphological studies these two species had been performed by using different quantitative qualitative parameters to know karyotype asymmetry, which defines advanced primitive nature species. The study revealed that diploid with 2n=22 chromosomes. based on Total Chromatin Length, Arm Ratio, Gradient Index, Form Pe...

Journal: :Genetics and Molecular Biology 2017

Genetic variations were studied for 13 accessions of Lolium multiflorum using cytogenetical traits. Karyotype was prepared for 5 metaphases cells of each accession and the traits of total length (TL), long arm (LA), short arm (SA), arm ratio (AR) and centromer index (CI) were determined by micromeasure software. Six accessions were diploid and seven accessions were tetraploid, the basic chromos...

Journal: :Genetics and molecular research : GMR 2014
J Q Ye Y Y Jia K Fan X J Sun X M Wang

Rheum palmatum, one of the source plants of the traditional Chinese medicine rhubarb, is anendemic and endangered species. To our knowledge, this is the first report on the chromosome number and karyotype of this species. Sectioning combined with micrography was used to analyze the karyotype. The following results were obtained: R. palmatum had a stable chromosome number 2n = 22; the basic numb...

2017
Enoque Medeiros-Neto Felipe Nollet Ana Paula Moraes Leonardo P. Felix

The asymmetry indexes have helped cytotaxonomists to interpret and classify plant karyotypes for species delimitation efforts. However, there is no consensus about the best method to calculate the intrachromosomal asymmetry. The present study aimed to compare different intrachromosomal asymmetry indexes in order to indicate which are more efficient for the estimation of asymmetry in different g...

اصغری زکریا, رسول, خبیری, تورج, زارع, ناصر, سفالیان, امید,

In order to investigation of chromosomal variation in various populations of Aegilops cylindrica from northwest of Iran, the karyotype of each populations was prepared using aceto-iron-hematoxilin staining and different chromosomal characteristics were measured. The results showed that the karyotype of these populations consisted of seven pairs of metacentric, three pairs of submetacentric and ...

Journal: :Genetics and molecular research : GMR 2016
R B Chiavegatto C M P Paula F Souza Sobrinho F R G Benites V H Techio

Cynodon is a genus of plants with forage potential that has attracted the interest of breeders. These species have high morphological variability in a large number of varieties and cytotypes, hampering identification. This study aimed to determine the karyotype asymmetry index among accessions of Cynodon to discriminate between them. Karyotype symmetry was based on three estimates, which were c...

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