Inheritance of somatic embryogenesis and plantlet regeneration from primary (type 1) callus in maize |
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Authors: | M R Willman S M Schroll T K Hodges |
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Institution: | (1) Department of Botany and Plant Pathology, Purdue University, 47907 West Lafayette, Indiana |
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Abstract: | Summary Genetic factors controlling the differential expression of somatic embryogenesis and plant regeneration of maize from tissue
culture were studied in two crosses. Inbred, hybrid, F2 and backcross generations developed from crossing maize inbred A188
with two commercially important inbred maize lines (B73 and Mo17) demonstrated genetic and environmental effects on somatic
embryogenesis and plant regeneration when immature zygotic embryos were cultured on MS medium. Additive gene effects were
more important in both crosses than dominant gene effects for precent somatic embryogenesis and percent or number of plants
regenerated per embryo when generation means were analyzed. In backcross generations of each cross, cytoplasmic, maternal
and/or paternal effects were significant for frequency of somatic embryos three weeks after culture as well as frequency,
or number of plants regenerated per embryo, nine weeks after culture. Analysis of genetic variances suggests at least one
gene (or block of genes) controls the expression of the frequency of somatic embryogenesis in these crosses. Differences in
somatic embryogenesis and plant regeneration between B73 and Mo17 are discussed.
This is Journal Paper No. 11,435 of the Purdue University Agricultural Experiment Station. |
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Keywords: | Zea maize L genetic effects maternal effects cytoplasmic effects paternal effects environmental effects |
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