Consulta: creatorFacets:"Santos,Alexandra I"
Registros recuperados: 3
Data/hora: 10/06/2024 15:13:35

Preliminary Evaluation of 29 Olive (Olea europaea L.) Cultivars for Production and Alternate Bearing, in the Huasco Valley, Northern Chile
Provedor de dados: 117
Autores: Tapia C,Francisco; Mora,Freddy; Santos,Alexandra I.
There is increasing interest in the development of intensively managed olive orchards (Olea europaea L.) in northern Chile. The selection of specific varieties that perform well on a particular site is considered crucial to maximizing productivity. The present study was undertaken to evaluate the productive performance of 29 varieties of olive in the Huasco Valley (28°34' S, 70°47' W), Northern Chile.The traits evaluated were: mean olive production per tree considering a longitudinal (PML) analysis over a period of five years, 2003 to 2007, total olive production in the same period (PA03-07) and alternate bearing index (ABI). The effect of variety was highly significant (p &lt; 0.01) for all traits. In the field trial, IAP was moderate (0.52), with PML...
Tipo: Journal article
Palavras-chave: Olive fruit; Alternate bearing.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300004

Bayesian Analysis of the Genetic Control of Survival in F3 Families of Common Bean
Provedor de dados: 117
Autores: Mora,Freddy; Gonçalves-Vidigal,Maria C; Santos,Alexandra I.
The objectives of this study were to examine the genetic control of survival in segregant families F3 of the common bean (Phaseolus vulgaris L.) in southern Brazil during the 2004-2005 growing season, to identify useful genotypes for the breeding program of this crop, and to determine the genetic association between survival and weight of 100 seeds (production trait; P100). A Bayesian approach was used to predict breeding values and to estimate variance components. Survival was recorded as a binary response: dead plant or live plant during harvest. The total population consisted of 11,520 individual plants. The difference in the magnitude between the best and the worst families was as high as 22%, and varied from 57 to 73%. Survival was found to be highly...
Tipo: Journal article
Palavras-chave: Genetic improvement; Breeding; Gibbs algorithm; Heritability.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000400003

Mapeo de loci de caracteres cuantitativos (QTL) usando un enfoque multivariado
Provedor de dados: 118
Autores: Mora,Freddy; Santos,Alexandra I; Scapim,Carlos A.
Los procedimientos usados en el mapeo de loci de característica cuantitativa (QTL) son continuamente estudiados ya que son fundamentales para mejorar la precisión del análisis genético. El presente estudio tuvo como objetivo examinar QTLs a través de métodos muí ti variados, considerando el principio de mapeo por intervalo simple. Se simuló un conjunto de datos de marcadores moleculares microsatélites provenientes de una población F2. Al mismo tiempo se consideró que los QTLs controlan características de distribución normal y binomial. En el caso normal se consideraron cinco modelos con las siguientes estructuras de covarianzas residuales: Componentes de varianza (VC), simetría compuesta (CS), no estructurada (UN), diagonal principal (Banded Main Diagonal;...
Tipo: Journal article
Palavras-chave: Análisis multivariado; Binario; Ecuaciones generalizadas; Marcador molecular; Mejoramiento genético; QTL.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000200003