The cytological features including chromosome number, karyotypic characteristics, C-banding and silver NOR-banding were investigated in a local cultivar of Allium sativum L., from Turkey. Actual lengths, relative lengths, L/S arm ratios of mitotic chromosomes were calculated from best six metaphase plates. Only Chromosome 5 was submedian, all the others were median. C-banding was observed on 4 ...

The stingless bee Partamona helleri (Meliponini) is distributed across the Atlantic rainforest biome in Brazil. Cytogenetic studies on P. have shown a conserved diploid number and presence of several B chromosome types. Our goal was to investigate intraspecific karyotypic variation among 21 colonies from 14 different localities four Brazilian states, using classical molecular cytogenetics, as w...

eleven populations of five avena species were analysed for meiotic characters including chiasma frequency and distribution as well as chromosomal association and segregation. plants of a single population of a. eriantha showed the presence of 2n = 14 (diploid) and 2n = 4x = 28 chromosome number. populations of a. barbata and a. wiestii possessed n = 14, while populations of a. sterilis ssp. lud...

 constriction and staining properties by aceto-iron-hematoxylin were analyzed for Prunus species of apricot (Prunus armeniaca L.), plum (P. cerasifera Ehrh.) and a natural new hybrid known as “TANASGOL” (P. cerasifera × P. spp.). The obtained root tips from germinated seeds at 4–6 °C and young seedlings were pretreated in hydroxyquinoline solution with 50 drops of DMSO. All species had 2n=2x=16...

Background: Lymphocytes of Fanconi anemia (FA) show an increased sensitivity to the alkylating agents such as mitomycin C (MMC), but their responses to gamma-irradiation is controversial. The extent of DNA damage in leukocytes of FA patients following irradiation and MMC treatment was studied at cellular and single chromosome level. Methods: DNA damage induced by gamma-rays and MMC was measure...

Body weight (BW) and carcass traits are complex and important economic traits that may benefit from the implementation of MAS. The objective of the current study was to identify QTL associated with BW and carcass traits in an experimental half-sib cross of Japanese quails selected for BW at 4 weeks of age. Body weight and carcass traits were measured in the F2 population. Total F2 individuals a...

Cytogenetic characterization of D. polymorpha was carried out using banding techniques such as C-banding, fluorochrome CMA3 and silver nitrate treatment. The diploid chromosome number of both investigated D. polymorpha forms (typical and albinotic) was the same 2n = 32 (NF = 56). The karyotype consisted of 5 pairs of metacentric, 7 pairs of submetacentric and four pairs of subtelo-acrocentric c...

To locate the genes controlling adaptability in bread wheat using AMMI (additive main effect and multiplicative interaction) model, twenty-one substitution lines derived from the parents Chinese Spring (recipient) and Chayan (donor) were used in a randomized complete block design with three replications in three different environments in the Agricultural College of Razi University, Kermanshah, ...

HROMOSOMES with two similar ends have been recognized since the pioneer work of BELLING and BLAKESLEE (1924) on the secondary trisomes of Datura. More recently, the term, isochromosome, has been applied .by DARLINGTON (1939) to those chromosomes which have two identical arms. When found occurring naturally, the isochromosome has usually been shown to consist of inert, or B-type chromosomal mate...