Somaclonal variation is one of the possible sources of variation in plant breeding. To evaluate the usefulness of somaclonal variation for creating variation in Iranian cultivars of wheat, proteins, enzymes and chromosome number of regenerated and seed-produced plants of wheat (Alamout, Hyrmand and Maroon) were studied. Plantlets obtained from the immature embryos and seed culture were collecte...

(Received 23rd January 1968, revised 25th May 1968) Summary. All possible crosses were made between European wild pigs with either 36 or 37 chromosomes and domestic swine with 38. The 36 \m=x\36 cross produced only pigs with 36; the 36 \m=x\37 and 37 \m=x\38 crosses yielded the parent numbers in about equal numbers of pigs. All pigs resulting from the 36\m=x\38cross had 37, while crossing 37\m=...

The Eukaryotic Cell Cycle and Mitosis 8.3 Compare the structure of prokaryotic and eukaryotic chromosomes. 8.3 Describe the formation, structure, and fate of sister chromatids. 8.4 Describe the stages of the cell cycle. Identify when DNA is replicated, chromosomes are sorted, and two new cells are formed. 8.5 List the phases of mitosis and describe the events characteristic of each phase. Recog...

BACKGROUND AND AIMS We compared chromosome number (CN) variation in the nearly antipodean Italian and New Zealand floras to verify (i) whether patterns of variation reflect their similar latitudinal ranges or their different biogeographic/taxonomic contexts, (ii) if any differences are equally distributed across major taxa/lineages and (iii) if the frequency, number and taxonomic distribution o...

Lepidoptera (butterflies and moths), as many other groups of animals and plants, simultaneously represent preservation of ancestral karyotype in the majority of families with a high degree of chromosome number instability in numerous independently evolved phylogenetic lineages. However, the pattern and trends of karyotype evolution in some Lepidoptera families are poorly studied. Here I provide...

this study concerns the cytotaxonomic investigations on twelve species belonging to three sections from the genus vicia in iran. a taxonomic background of the genus is given in brief. the previous counts reported for the genus in index to plant chromosome number are summarized. in addition to one new count, the chromosome numbers of four species are reported for the first time. briefly, the res...