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A group of organisms having the same genotype.



a group of organisms, part of a local population, which have the same genotype and are similar in practically all respects. The Danish biologist W. Johannsen (1909) considered the homozygotic biotype in self-pollinating plants to be the most elementary structural unit of a population. The Soviet botanist V. N. Sukachev (1927, 1935) called clones of plants that were derived by numerous root grafts of the plant or by division of a single bush “biotypes.” In populations of cross-pollinated species, biotypes can be distinguished both as successive selection with isolation of the offspring and as manyfold multiplication in close degrees of relation (inbreeding). In the 1920’s and 1930’s many biologists (the Swedish botanist G. Turesson; the Soviet biologists N. I. Vavilov, M. A. Rozanova, and others) considered biotypes to be the smallest taxonomical unit. Species, in their opinion, arose from combination of biotypes as a result of recombination and selection.

Large groups of organisms, often consisting of many species and characterized by similar adaptation to the exploitation of definite habitation conditions, are also called biological types or life forms. In this sense, for example, the group of underground burrowing rodents, the group of ephemeral desert plants, and so on are taken to be biological types.


Berman, Z. I., K. M. Zavadskii, A. L. Zelikman, et al. Sovremennye problemy evoliutsionnoi teorii. Leningrad, 1967.
Zavadskii, K. M. Vid i vidoobrazovanie. Leningrad, 1968.


References in periodicals archive ?
First report of the Q biotype of Bemisia tabaci in Japan by mitochondrial oxidase I sequence analysis.
tabaci biotype B among evaluated treatments, we observed significant differences among them at 14 and 28 DAE, with both periods presenting IAC Centauro less infested than IAC Harmonia.
Using the differential display technique, differentially expressed cDNAs between the resistant and susceptible biotypes of E.
cholerae phenotype was the consequence of changes in the O antigencoding region but the overall traits and core genetic background of the El Tor biotype were maintained (5).
In Poland, all but 1 strain isolated from local and invasive infections belonged to biotype gravis, whereas biotype mitis dominated among the invasive isolates in Switzerland and France, and biotype gravis dominated among isolates from local infections in Italy and the United Kingdom (5,8-10).
Mitochondrial DNA Evidence for a distinct New World group of Bemisia tabaci (Gennadius) (Hemiptera:Aleyrodidae) indigenous to Argentina and Bolivia, and presence of the Old World B Biotype in Argentina.
cholerae serogroup O1 classical (CL) biotype was associated with the sixth, whereas the seventh (ongoing) pandemic was initiated by V.
The Aphid Biotype and Natural Enemy Collection contains more than 100,000 specimens.
The isolates were also sent to Indian Veterinary Research Institute (IVRI), Izatnagar for identification, and were identified as Brucella melitensis biotype 1.
Our estheticians will be using the Biotype system that includes natural plant extracts, trace minerals, and essential oils to precisely target each individual's skin needs.