Inbred


Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.

Inbred

 

the offspring of a cross-pollinating plant obtained as a result of repeated forced self-pollination. With repeated self-pollination the viability and yield of the offspring are decreased, while the homogeneity in respect to the genotype is increased. As a result of heterosis, hybrids from the crossbreeding of inbreds are substantially superior to the parent forms in vigor of development and seed yield. For this reason, inbreds are important in the production of hybrid seeds of corn, sugar beets, cucumbers, and other crops.

Varieties or hybrids serve as the initial material in the development of inbreds. Succeeding generations are culled until the necessary homogeneity is attained, usually in the sixth generation. In culling, special attention is paid to the combining ability of the inbred. Only inbreds that with cross-pollination produce high-yield hybrids are selected. Inbreds are used to obtain hybrids of various types—for example, simple and double hybrids between lines and between varieties and lines. The highest yields are obtained from hybrids between lines, which are widely used, for example, in corn production.

REFERENCE

Guliaev, G. V., and Iu. L. Guzhov. Selektsiia i semenovodstvo polevykh kul’tur. Moscow, 1972.

IU. L. GUZHOV

References in periodicals archive ?
frugiperda neonates for each of the inbred line entries when the plants were at the 6-leaf (V6) stage.
integrating) data obtained from intercrosses of several inbred strains (i.
Charles River, despite years of experience in maintaining inbred strains, also struggled to reproduce transgenic strains for distribution.
Because of the few founders, each of the lineages has become inbred in captivity.
The inbred mouse strain C57BL/6J (B6) is known to display a wide range of birth defects following the administration of ethanol during pregnancy.
I don't accept that the people of Hereford are inbred.
Identification of commercially available inbred strains of mice that show a differential response to a well-defined infectious challenge is the first requirement for study of genetically regulated host resistance factors.
Sometimes ruggedly flopping on one another, sometimes tenderly wiping someone's cheek with an apron, these women live the inbred, tense, sexually ambiguous life of those with lots of room and nowhere to go.
Lab animals are inbred to create strains susceptible to specific diseases (1933)
Using this high-throughput genotyping platform, Charles River will be able to rapidly analyze thousands of samples for SNP analysis per month, ensuring researchers the congenicity of their inbred and first generation hybrid strains used in biomedical studies.
Proportion of inbred animals reached in CLA, CLWd, CLWs, and DC was higher (57.