Ubiquitous partial heritability thesis

Nodal rooting ability, prostrateness, and stem thickness seemed to be controlled by a low number of genes, whereas leaf size seemed to be controlled by several Ubiquitous partial heritability thesis.

Heritability values in GE interaction experiment were different from the heritability broad sense values in hierarchical mating design for most of the attributes, indicating the influence of GE interaction effect. In other words four sets of crosses, two intra- and two inter-population sets, were made.

The two plant populations examined by the mating design, presented different patterns of genetic variation. Nine random plants from each type were cloned and used as male parent. Each set was examined in a randomized complete block design with three replications.

To evaluate the progeny families produced, male groups were divided into six sets, each containing three male groups from the same type. As a result of GE interaction analysis, a large amount of genetic variation was found in the genotypes examined.

Cluster analysis revealed that each of the three red clover types have their own particular responses to the environment effect. Prostrateness and stem thickness were partially to completely dominant over erectness and stem thinness. Several attributes which were distinct enough in the two types so that it could be assumed that parent populations were nearly homozygous in opposite directions, were studied in these crosses.

Several techniques of univariate and multivariate analysis were applied in order to quantify and qualify the magnitude and pattern of the possible genotype-environment interaction effects.

Twelve genotypes four per type were studied in a randomized complete block design with three replications at two sites for two successive years. Three, six, and the best parsimonious models were presented for the studied attributes. However, in the erect population, dominance components of variance were more important than additive.

Heritability narrow sense estimated in hierarchical mating design varied from intra- to inter-population crosses. Several attributes presented significant first and second order interaction effects.

Prostrate growth habit reduced dry matter yield through significant negative correlation with yield components. This difference was not noticeable in prostrateness.

Three types of experiments were carried out: Small leaf size was over-dominant over large leaf size. Number of stems, plant height, and stem thickness presented fairly high hybrid depression negative heterosis.

To achieve these, three pairs of parent plants were used one erect and one prostrate in each pair to produce F1, F2, Bc1, and Bc2. Multivariate discriminant analysis based on these effects revealed discriminant scores by which the contribution and importance of each attribute in the response of genotypes examined in the environments was studied.

Stem length, number of internodes, number of branches, and plant diameter presented high level of heterosis.

In inter-population crosses, additive components were more important than dominance components. Phenotypic and genotypic correlation values were estimated for each year and type separately as well as for the whole data set in genotype-environment interaction experiment.

Each male parent was crossed to six different random plants as female parents, three from the same population and three from opposite population. Phenotypic and genotypic correlation patterns were different from year to year and type to type. Although the prostrate population did not have much genetic variation, its additive genetic variance components were of more importance than dominant components.

Export to EndNote Abstract Three major experiments were conducted to investigate quantitative genetic aspects of prostrateness and related attributes in red clover Trifolium pratense L. Various genetic parameters including genetic variance components and heritability of several morphological attributes were estimated.

These were done on several red clover genotypes with prostrate growth habit, nodal rooting ability, and early flowering characteristics, together with several other genotypes from semierect and erect types.

Heritability broad sense and narrow sense were estimated in genotype-environment interaction experiment and hierarchical mating design.

There were strong evidences for additive x additive non-allelic interaction for stem thickness, additive x dominance interaction for leaf size, and dominance x dominance interaction for prostrateness and leaf size.American Journal of Sociology - Genetical Ou Social - Free download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online for free.

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The thesis of ubiquitous partial heritability is that genes are causally related to the overwhelming majority of the individual-level variables studied as outcomes by social scientists, which I will hereafter call “individual outcomes” and intend as defined.

The thesis of ubiquitous partial heritability is that genes are causally related to the overwhelming majority of the individual‐level variables studied as outcomes by social scientists, which I will hereafter call “individual outcomes” and intend as defined ostensively by the above examples.

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Ubiquitous partial heritability thesis
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