Pre-germination Selection Against a Deleterious Mutant in Red Pine
Self-pollination of a "marker" bearing Pinus resinosa Ait. produced a progeny which contained seedlings in a ratio of one mutant to five normal. Subsequent self-pollination of this tree, using pollen diluted with a carrier, yielded a progeny in which the proportion of mutant seedlings (1 mutant: 3.3 normal) did not diverge significantly from the expected 1:3 monohybrid ratio. It was concluded that the mutant seedlings found in the progeny, resulting from self-pollination of the "marker" tree, are homozygous for a single recessive gene. The divergence from the 1:3 ratio expected, following self-pollination of a tree heterozygous for a single recessive gene, resulted from selection against zygotes, pro-embryos or embryos homozygous for the mutation.
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Document Type: Journal Article
Affiliations: Research Scientist, Ontario Department of Lands and Forests, Maple, Ontario
Publication date: 1964-09-01
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