Isolation of maize from pollen-mediated gene flow by time and distance

Development of improved genetic traits in maize (Zea mays L.) requires robust measures to prevent pollen-mediated gene flow (PMGF) and assure isolation of new traits, whether these traits are the result of conventional breeding or of modern genetic techniques. Studies were conducted in California an...

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Bibliographic Details
Published in:Crop science 2005-11, Vol.45 (6), p.2172-2185
Main Authors: Halsey, M.E, Remund, K.M, Davis, C.A, Qualls, M, Eppard, P.J, Berberich, S.A
Format: Article
Language:English
Subjects:
Agricultural production
Agronomy. Soil science and plant productions
Biological and medical sciences
Classical and quantitative genetics. Population genetics. Molecular genetics
color
Corn
Crop science
environmental factors
Fundamental and applied biological sciences. Psychology
Gene flow
Generalities. Genetics. Plant material
Genetic aspects
genetic isolation
Genetics
Genetics and breeding of economic plants
Genotype & phenotype
grain crops
open pollination
phenology
Plant genetics
Pollen
Pollination
Population genetics
seeds
spatial distribution
temporal separation
wind pollination
Zea mays
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Summary:Development of improved genetic traits in maize (Zea mays L.) requires robust measures to prevent pollen-mediated gene flow (PMGF) and assure isolation of new traits, whether these traits are the result of conventional breeding or of modern genetic techniques. Studies were conducted in California and Washington to evaluate the relationship of distance and temporal separation for isolation from PMGF. Kernel color was used to detect outcrossing from source plots of 0.4 to 1.2 ha in size to receptor plots planted at distances up to 750 m and planting intervals of up to 3 wk from the pollen source. Outcrossing from source to receptor plots was observable to 0.0002% (1 kernel in approximately equal to 500 000 kernels). Increasing temporal separation reduced the distance required to achieve genetic isolation. Outcrossing was
ISSN:0011-183X
1435-0653
DOI:10.2135/cropsci2003.0664