Introduccion a la Genetica Cuantitativa by D. S. Falconer at – ISBN – ISBN – ACRIBIA – – Softcover. DownloadIntroduccion a la genetica cuantitativa falconer pdf. PDF 5. Quarantine 13A 57EF exe C WINDOWS Temp NavBrowser. Introduccion a. Introduccion a La Genetica Cuantitativa Falconer PDFThis action might not be possible to undo. Are you sure you want to continue?.
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All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Besides breeding strategies, there are also biometric methodologies with a strong theoretical base which could be used by plant breeders to efficiently identify superior genotypes and obtain greater gains. This may result in a reduction in the effective size of the population in the more advanced fuantitativa generations and consequently in an increase in inbreeding.
As in the first three cycles, selection was based on the means over the environments to improve the genetic adaptability of the population, including those with lower densities, by giving priority to prolificacy.
When the relationship among progenies descending from the same half-grandmother was discounted for the HSP selection by the BLP methodology, i. The coefficients of coincidence percentage of common HSP selected by each methodology and the expected gains from selection were estimated.
Sire evaluation and genetic trends. The SAWHSP method was shown to be efficient in the isolation of the additive genetic variance component from the phenotypic variance. Among these are BLUP best linear falocner predictorwhich classifies individuals submitted to selection using a function of the observed data and a matrix of genetic and residual variances and covariances of previously known traits Henderson, The pedigree system, although unnecessary for Cuanitativa selection, allowed the prediction of an increase in the rate of inbreeding in the long term with the originally proposed scheme, when recombination is simultaneously carried out with the creation of new progenies.
The pedigree analyses of the selected HSP in the fourth among progeny selection cycle Tables II and III show that truncated selection caused an imbalance in the expected frequency of new and old progenies. This implies that greater care with the effective size of the population must be taken with this method. Let’s connect Contact Details Facebook Twitter.
There was a tendency for the BLP methodology to select a greater number of related progenies pedigree than the SAWHSP method, which implies greater care with the effective size of the population.
John Wiley and Sons, New York, pp. Send correspondence introducciion C. The environment variation coefficients are within the variation limits found by Ramalho for this type of progeny.
However, the existing relationship among different HSP derived from the same half-grandmother was not sufficient to differentiate the gains from the two methodologies. A negative correlation of The seeds of the HSP assessed in these experiments were obtained from the harvest of the 10 best plants selected within each of the 20 female rows, in an isolated recombination plot from remnant seeds of the HSP selected by Arriel et al. Success in genetic breeding is mainly dependent on the selection method used.
Thus, the diagonal of the kinship sub-matrices is 0.
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No supplementary irrigation was used. This may be seen in the reduction of the number of old progenies in the pedigree of the new selected progenies, which in experiments, and was 13, 9, 9 and 8, respectively.
Introduccion a la Genetica Cuantitativa. Among 20 progenies selected for their phenotypic value in experiments, andthe following old progenies contribution were quantified: These ijtroduccion coefficients were estimated for half-sib progenies, with remnant seeds, based on the following expressions:.
Cookies are little nuggets of information that web servers store on your computer to make it easier for them to keep track of your browsing session. This shows that as the gebetica variance increases in relation to the residual variance, the BLP tends to select the same individuals that would be selected based on greater phenotypic values.
Table IV also shows that the BLP selected a greater number of progenies stemming from the same ancestor, totaling 11 different maternal half-grandmothers. Several methods have been suggested and modified introducfion recent years for greater selection efficiency using the statistical properties most suitable for different experimental situations. First, the relationship of half-grandparents between the new HSP new cycle and the old HSP previous cycle is irrelevant.
The realized gain estimated by Arriel et yenetica.
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This genealogical structure is disregarded in the original methodology quoted by Paterniani and Miranda Filhobased on two assumptions. Statistical Genetics and Plant Breeding.
According to Hendersonthe BLUP of g is defined as the regression coefficient of the genetic values g in function of the observations y corrected for the fixed effects Xb. A activation email has been sent to you. The authors would like to thank the valuable collaboration of Drs. In this method, the genetic gains were identical to those obtained based on the BLP, showing its efficiency in isolating the additive component, responsible for the heritability and the expected gain, from the phenotypic variance.
How to cite this article. Second, it assumes that the gametes of all HSP in the recombination plot have the same frequency, resulting in equal chances of fertilization and in a balanced contribution of each progeny to the next cycle. The correction of the progeny phenotypic values in function of the design was carried out by adjusting the lattice means. There was a tendency in the BLP methodology to select a greater number of related progenies because of the previous generation pedigree than the other method.