Inheritance and linkage of isozymes in white spruce (<i>Picea glauca</i>)

King, John; Dancik, Bruce P.

doi:10.1139/g83-066

Cited by 76 publications

(41 citation statements)

References 10 publications

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“…Especially striking is the highly conservative linkage group of Got-i and Pgi-2 resulting in a distance estimate of 16 cM which agrees well with other studies in the Picea genus (King and Dancik, 1983;Boyle and Morgenstern, 1985;Barret et a!., 1987;Muona e al. 1987).…”

Section: )supporting

confidence: 89%

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Linkage analysis of isozyme gene loci in Picea abies (L.) Karst.

Geburek

Wuehlisch

1989

Heredity

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Section: )supporting

confidence: 89%

“…The linkage blocks of Mdh-2: Mdh-3 and Got-i: Lap-2 could not be studied in the present investigation. Linkage of Pgi-2 and 6-Pgdh-2, 3 in P. g!auca (King and Dancik, 1983) is not supported by our data.…”

Section: )contrasting

confidence: 85%

Linkage analysis of isozyme gene loci in Picea abies (L.) Karst.

Geburek

Wuehlisch

1989

Heredity

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“…These two enzymatic systems were reported to be under nuclear DNA control with codominant alleles not only for C. sempervirens but also, to our knowledge, for all gymnosperms studied [1,7,8,12,15,19,22,25,32,37,38]. All enzymatic systems tested in C. sempervirens, (including PGI and LAP) were similarly expressed in endosperm and embryo tissues [29].…”

Section: Embryo Genotypes Of C Dupreziana Seedsmentioning

confidence: 79%

Lack of mother tree alleles in zymograms of Cupressus dupreziana A. Camus embryos

2000

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-Unexpected ploidy levels observed in a previous flow cytometric analysis of Cupressus dupreziana endosperm, led us to hypothesize an asexual seed production in this endangered species. We tested here this possible apomixis, studying isozyme variability of endosperms, embryos and seed coats extracted from open pollinated seeds. Electrophoretic bands observed in zymograms of PGI2 and LAP, the only two polymorphic systems, were in agreement with bands observed in C. sempervirens zymograms. Zymograms of C. dupreziana endosperms were identical to those of the diploid maternal tissue, as observed in C. sempervirens. Hypothesizing a codominant nuclear DNA control for both PGI2 and LAP, a similar electrophoretic expression of these systems in endosperm and embryo, and the absence of modifier genes, the lack of endosperm bands in most embryo zymograms was interpreted as the result of a strictly paternal origin of embryo nuclear DNA in C. dupreziana seeds. Cupressus dupreziana / isozyme / reproduction / gymnosperm / paternal inheritanceRésumé -Absence d'allèles maternels dans les zymogrammes des embryons de Cupressus dupreziana A. Camus. De précé-dents travaux portant sur les niveaux de ploïdie de l'endosperme des graines de Cupressus dupreziana, nous avaient conduit à émettre l'hypothèse d'une reproduction apomictique chez cette espèce menacée. Cette hypothèse a été ici testée par l'étude de la variabilité enzymatique d'endospermes, d'embryons et de téguments de graines issues de pollinisation libre. Les zymogrammes observés pour les deux systèmes polymorphes, PGI2 et LAP, sont conformes à ceux observés chez C. sempervirens. Les zymogrammes des endospermes de C. dupreziana sont identiques à celui de l'arbre mère, comme précédemment observé chez C. sempervirens. La plupart des zymogrammes produits par les embryons des graines de C. dupreziana ne contiennent pas les bandes électrophorétiques des endospermes correspondants. Chez tous les gymnospermes étudiés, PGI2 et LAP sont des marqueurs codominants, sous contrôle génétique nucléaire. Chez C. sempervirens l'expression de ces systèmes est indépendante des tissus (endosperme ou embryon) et aucun gène modificateur n'est connu. Dans ce contexte, nous formulons l'hypothèse d'une origine strictement paternelle de l'ADN nucléaire des embryons.Cupressus dupreziana / isozyme / reproduction / gymnosperme / hérédité paternelle

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“…(1979), and 10 polymorphic loci were scored for each trunk on four different buffer systems. Phosphoglucomutase (PGM-2) was scored on the histidine II buffer of King & Dancik (1983).…”

Section: Methodsmentioning

confidence: 99%

Relatedness within clusters of a bird-dispersed pine and the potential for kin interactions

Schuster¹,

Mitton²

1991

Heredity

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Limber pine is a bird-dispersed species that frequently exhibits a multiple-trunk growth form. Previous studies have documented genetically distinct individuals within such groups of trunks, presumably resulting from bird seed caches. We surveyed every trunk of each tree in an isolated population of limber pine at 10 electrophoretic loci to determine how many trees were present and to estimate the relatedness of trees within clusters. Fewer than 20 per cent of the multi-trunk groups were found to contain multiple individuals. Damage to growing leaders (and possibly other unknown mechanisms) has apparently resulted in a multi-trunk growth form in single trees. Tree clusters contained from 2 to 4 individuals, and we estimate that trees within these clusters are related as slightly less than haif-sibs, on average (r 0.19 0.10). The occurrence of kin groups in limber pine indicates the potential for interactions such as kin selection and sib competition.Examination of connections between these trees revealed frequent root and trunk fusion, usually between more genetically similar trees. We discuss the possibility that this trait evolved through kin selection.

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Inheritance and linkage of isozymes in white spruce (Picea glauca)

Cited by 76 publications

References 10 publications

Linkage analysis of isozyme gene loci in Picea abies (L.) Karst.

Linkage analysis of isozyme gene loci in Picea abies (L.) Karst.

Lack of mother tree alleles in zymograms of Cupressus dupreziana A. Camus embryos

Relatedness within clusters of a bird-dispersed pine and the potential for kin interactions

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