A total of 1866 barley plants were progeny tested in the greenhouse. Twenty-five plants segregated for newly arisen, spontaneous chlorophyll mutant genes. Among the total of 470, 129 seedlings screened there were 79 mutants (1.7 ± 0.6times10-4). The data are added to data from three similar materials and the resulting estimate of the chlorophyll mutant frequency is 1.6times10-4 in about 1.43 million seedlings. The estimate of the chlorophyll mutation rate per generation is close to 6.3times10-4 per diploid genome or in the order of 6times10-7 per locus and haploid genome.
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Jørgensen et al. (2008) studied this question.
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