Inheritance of isozyme variants in seed tissues of balsam fir (Abies balsamea)

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Abstract
Evidence for the inheritance of isozymes in megagametophyte (1N) and embryo (2N) seed tissues of balsam fir (Abies balsamea (Linn.) Mill.) is presented. Segregation of isozymes in megagametophytes of heterozygous mother trees and comparison of banding patterns with those of other conifers indicate that a minimum of 14 loci code isozymes in the enzyme systems studied. Isozymes coded by 13 of these loci are detectable in both seed tissues; one locus is apparently active only in haploid tissue. Two loci segregation data were available for 20 of the 28 possible pairwise combinations of eight polymorphic loci. Chi-square tests of independence revealed that five of these pairs are linked. Genes similar to those in two of the pairs are linked in other Pinus species.

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