Journal ArticleDOI
Cytogenetic studies in some species of Bromus L., section Genea Dum.
Masoud Sheidai,Fatemeh Fadaei +1 more
TLDR
Chiasma frequency and distribution, as well as chromosomal association and segregation, in ten Iranian populations of six Bromus species from the section Genea are studied, uncovered several hitherto undescribed inter-population variations in cytological characteristics.Abstract:
The genus Bromus L. (tribe Bromeae, family Poaceae) comprises about 160 annual and perennial species (Acedo and Liamas 2001), distributed all over the world. Bromus species are among important range grasses of Iran and are placed in six sections, of which section Genea Dum. contains six perennial species found in Iran (Bor 1970). The available literature dealing with cytogenetics of Bromus (e.g. Devesa et al. 1990; Lövkvist and Hultgård 1999), indicates the importance of such cytological studies for understanding the evolution of the genus Bromus. Therefore, we studied chiasma frequency and distribution, as well as chromosomal association and segregation, in ten Iranian populations of six Bromus species from the section Genea. The results uncovered several hitherto undescribed inter-population variations in cytological characteristics.read more
Citations
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Cytological study the genus Arenaria L. (Caryophyllaceae).
TL;DR: Karyotype and meiotic studies were performed in 16 populations of seven Arenaria species growing in Iran supporting the earlier report on A. insignis and A. gypsophiloides, and differed in their karyotype formulae indicating the occurrence of structural changes in their chromosomes.
Journal ArticleDOI
Meiotic behaviour of tetraploid wheats (Triticum turgidum L.) and their synthetic hexaploid wheat derivates influenced by meiotic restitution and heat stress
TL;DR: The results indicated that the samples that had been planted in the autumn, thus experiencing an optimum temperature level at the flowering stage, exhibited less meiotic irregularities than winter planting samples that encountered heat stress at the blooming period.
Journal ArticleDOI
Cytomixis—a unique phenomenon in animal and plant
Aninda Mandal,Animesh K. Datta,Sudha Gupta,Rita Paul,Aditi Saha,Benoy K. Ghosh,Arnab Bhattacharya,Mohsina Iqbal +7 more
TL;DR: A review on cytomixis is conducted with an objective that it may offer a scope to unravel some of the ambiguities associated with it and provide further information on cell, reproductive, structural and evolutionary biology.
Journal ArticleDOI
The Influence of Terminal Heat Stress on Meiosis Abnormalities in Pollen Mother Cells of Wheat
TL;DR: The result of this experiment showed that studying the meiosis in PMCs can be suggested as one of the research necessary to improve commercial heat-tolerant cultivars, and to some extent, as a method for screening tolerant lines in breeding programs.
Journal ArticleDOI
Meiotic Studies in Some Members of Caryophyllaceae Juss. From the Western Himalayas
TL;DR: The paper reports meiotic studies on 50 populations comprising 12 species belonging to 5 genera of Caryophyllaceae from the Western Himalayas, finding abnormal microsporogenesis led to reduced pollen fertility and differences in pollen grain size.
References
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Journal ArticleDOI
B-chromosome evolution.
TL;DR: Because B chromosomes interact with the standard chromosomes, they can play an important role in genome evolution and may be useful for studying molecular evolutionary processes.
Journal ArticleDOI
Cytomixis in Pollen Mother Cells of Diploid Dactylis, One of the Origins of 2n Gametes
Book
Cytogenetics in plant breeding
TL;DR: Methods of the diagnosis of abnormalities encountered in the plant material, of gene transfer between forms and species, of Gene fose manipulation, and of manipulation of the genetic systems are described in detail.