N two other papers in this series (GERSTEL 1956; GERSTEL and PHILLIPS in prep.) I the segregation of artificial hexaploid combinations was described. These had been obtained by crossing tetraploid New World cottons with diploid Wild American species and subsequent doubling of the chromosome number. For certain characters these hexaploids were of duplex genotype (i.e. of the type ZZzz). Segregat...

The history of cotton (Gossypium sp), which has become along past millennia a plant major economic interest, relies on the dried or charred seeds found in archaeobotanical assemblages. Our capacity to document dispersal routes cotton, however, is hampered by lack taxonomic resolution at specific levels based current seed anatomic features. In order explore signal interspecific level seeds, and ...

Ethnobotanical field studies in the Graaff-Reinet and Murraysburg regions (southeastern Karoo) have revealed a wealth of traditional knowledge on medicinal plants and their uses amongst elderly people of Khoi-San and Cape Dutch decent. The materia medica includes at least 86 species, most of which appear to be still in everyday use. The use of exotic plants (12 species) and similarities with th...

this study was carried out in order to investigate on chromosomal behavior during meiosis in herbaceum (iranian endemic), arboretum species, f1 hybrids of two species and bc4 genotypes. the endemic varieties used in this study were semnan and shahreza (herbaceum) and vtdl as arboretum cultivar. f1s investigations showed that in the adjacent and alternative quadrivalents frequently but the bc4 o...

Diploid A genome cottons are grown for their natural fiber in drought prone areas of Asia. Although they possess inferior fiber qualities to cultivated Upland and Pima cotton, their value lies in their inherent resistance to pests and diseases. Molecular linkage maps provide essential tools for plant genetic research, facilitating quantitative trait locus (QTL) mapping, marker-assisted selectio...