Cytology of Phleum sp. affin. P. montanum C. Koch

Autor:	J. Nath, E. L. Nielsen
Rok vydání:	1963
Předmět:	biology fungi food and beverages Chromosome Plant Science Horticulture medicine.disease_cause biology.organism_classification Phleum Prophase Polyploid Natural population growth Pollen Botany Genetics medicine Ploidy Agronomy and Crop Science Hybrid
Zdroj:	Euphytica. 12:161-166
ISSN:	1573-5060 0014-2336
DOI:	10.1007/bf00022352
Popis:	Diploid, tetraploid, and hexaploid plants occurred in foreign plant introductions of P. sp. affin. P. montanum from Turkey and Iran. Within-progeny variations in polyploid levels indicate that divergent races occurred as interspersed but natural populations. One to six B-chromosomes of varying sizes in addition to the normal chromosome complement were present in some plants. Their behaviours appeared essentially similar to those recorded for other species. Certain of the plants examined exhibited cytological features similar to those observed in known hybrids. These included prophase pycnosis, stickiness, split metaphase I plates, unoriented chromosomes at M-1, and low levels of pollen stainability. These features were absent in microsporocytes of other plants. Low open-pollination seed set characterized all plants examined. This may be due to hybridity or possibly to response to ecological conditions of the new environment.
Databáze:	OpenAIRE
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