Journal ArticleDOI
Genetics of the polycross : 1. Experimental results from Norway spruce.
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TLDR
A model, involving the existence of a linked lethal allele, is proposed, which accounts for significant temporal and maternal clonal differences observed in the rates at which single locus and multilocus gametes were incorporated in Norway spruce pollination.Abstract:
Rates and patterns of male gamete incorporation for a polycross mating design were studied for two independent years of pollination in Norway spruce, Picea abies (L) Karst. Segregation distortion in a subset of maternal clones was documented for one locus. We have proposed a model, involving the existence of a linked lethal allele, which accounts for these observations. Significant temporal and maternal clonal differences were observed in the rates at which single locus and multilocus gametes were incorporated. Striking differences in apparent fertility existed among four clones which produced unique multilocus gametes. One clone, in particular, was shown to be contributing three times as many gametes to the next generation as predicted by the hypothesis of equal clonal male contribution. These deviations from expectation were also detected in the genotypic distributions of the resultant filial generation. Ramifications of these results on family structures in the filial generation, effective size of the male population, and possible bias in inferences of genetic differences and parameter estimation are discussed.read more
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Journal ArticleDOI
Nuclear-cytoplasmic male sterility - single-point equilibria versus limit-cycles
TL;DR: The limit-cycle phenomenon may explain the negative correlation between the two cytoplasmic male-sterility types found in Plantago lanceolata and, more generally, any interpopulation variation inmale-sterile frequencies, without invoking any ecological cause.
Journal ArticleDOI
Fractional paternity assignment: theoretical development and comparison to other methods.
TL;DR: It is shown that the fractional method is the most accurate method for determining populational patterns of paternity because it assigns paternity to all progeny examined, and because it avoids biases inherent in the other paternity analysis methods when model assumptions are met.
Journal ArticleDOI
MATE CHOICE IN PLANTS: An Anatomical to Population Perspective
TL;DR: All have clear fitness interests in the mating process: Pollen donors and maternal plants can improve fitness by increasing the number and quality of offspring, and embryos must garner sufficient maternal resources to survive to maturity, germinate, and grow to reproductive size.
Journal ArticleDOI
Molecular genetics of growth and development in Populus. II. Segregation distortion due to genetic load.
TL;DR: An experimental three-generation inbred pedigree of Populus founded by interspecific hybridization between P. trichocarpa and P. deltoides was found to be tightly linked to the RFLP marker locus POP1054 and to cause embryo and seedling mortality.
Journal ArticleDOI
The dynamic mating systems of conifers
TL;DR: Variation in the mating success of both males and females violates the assumption that populations are randomly mating and at equilibrium, and justifies more quantitative analyses of mating systems.
References
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Book
Introduction to quantitative genetics
TL;DR: The genetic constitution of a population: Hardy-Weinberg equilibrium and changes in gene frequency: migration mutation, changes of variance, and heritability are studied.
Journal ArticleDOI
Principles of Plant Breeding
TL;DR: The history of plant breeding can be traced back to the early days of agriculture as discussed by the authors, when the first plants were planted in the wild. But the main focus was on hybridization of plants and the consequences of hybridization.
Journal ArticleDOI
A model for the estimation of outcrossing rate and gene frequencies using n independent loci
Kermit Ritland,Subodh Jain +1 more
TL;DR: A mixed mating model for many unlinked loci is described, and a procedure for estimation of the model parameters (outcrossing rate and gene frequencies), based on a multilocus maximum likelihood equation, is discussed and analyzed for bias, variance, and robustness.
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