Genetical control of alkaloid production in Lupinus mutabilis and the effect of a mutant allele Mutal isolated following chemical mutagenesis

摘要: A new mutant allele, described here as mutal, which reduces the alkaloid content in dry matter of lupinus mutabilis has been identified following seed treatment with ethyl methane sulphanate. The when homozygous, from levels > 2.0 per cent found existing populations to 0.2–0.3 and produces plants vegetative tissues that are organoleptically ‘sweet’. Component alkaloids homozygous for mutal differ respect percentage composition sparteine lupanine, well possibly oxa-sparteine 4-hydroxylupanine, but none is eliminated genotypes allele. Alkaloid concentration, so far not under control low heritability lines were isolated two generations successive selection possessed reduced levels. These interpreted have arisen a result recombination alleles affecting reduction level at several loci. mutant, established pure breeding line represents crucial additional step evolution Lupinus towards full status crop plant.