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31.600  Articles
1 of 3.160 pages  |  10  records  |  more records»
Iridaceae is one of the largest Asparagales families with over 2030 species. Besides a wide morphological variation, this family presents great karyological variation including many polyploid taxa. Sisyrinchium is restricted to the New World and it holds ... see more

Seedlessness in fruit is a trait that is much sought after by juice making industries. Close to the city of São Sebastião do Caí, in the state of Rio Grande do Sul (RS), Brazil, a new mutant orange originating from natural mutation was identified and sele... see more

The chromosome number and their behavior in 15 medicinal plant species collected from Doaba region of Punjab, India have been studied. The species have shown chromosome numbers like Basella rubra L. (n=22), Coccinia cordifolia Cogn. (n=12), Delphinium aja... see more

Polyploidy is an important evolutionary force but rare in vertebrates. However, in anurans, the genus Pleurodema has polyploid species, two of them tetraploid and one octoploid. The manner in which the chromosomes join in diakinesis can vary among species... see more


Pitangueira (E. uniflora) is considered a diploid species with n = 11 and 2n = 22 chromosomes, in genotypes with the presence of seeds in the fruits. With the pitangueira production of apyrenic fruits existence, such behavior may be related to the ploidy ... see more

This study aimed to evaluate the end-products of meiosis in sexual and apomictic hybrids of Urochloa decumbens, so as to identify genotypes with good production of viable pollen for use in breeding programs to increase yields of pure viable seed and reduc... see more

The cytogenetical analysis of the harvestman Holmbergiana weyenberghii (Holmberg) (Eupnoi, Sclerosomatidae, Gagrellinae) from Argentina is reported for the first time. The complement of males is composed of 18 chromosomes. In meiosis there are nine homomo... see more

Grama-tio-pedro (Paspalum oteroi Swallen) is a rare stoloniferous grass of the Plicatula group of Paspalum, well adapted to continuous grazing in areas subject to seasonal flooding in the Pantanal region, in central western Brazil. The species is a facult... see more

1 of 3.160 pages  |  10  records  |  more records»