SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Castañeda Bustos, Vielka Jeanethe.

Se obtuvieron los estimados de heredabilidad y las correlaciones genéticas y fenotípicas de producción de leche, reproducción y conformación con la vida productiva, real y funcional, a los 72 meses de edad en cabras lecheras utilizando el modelo animal. La vida productiva se definió como el total de días registrados en producción hasta los 72 meses de edad (VP72). La vida productiva funcional (VPF72), se obtuvo corrigiendo la VP72 para las producciones de leche (PL), grasa (PG) y proteína (PP), y calificación final de tipo (CF). Se usaron índices de selección incluyendo o excluyendo VP72 para estimar las respuestas a la selección considerando PL, PG, PP y VP72 como criterios de selección. Los principales criterios que determinaron el desecho de una cabra...

Palavras-chave: Vida productiva; Características de conformación; Heredabilidad; Correlación genética; Índice de selección; Productive life; Type traits; Heritability; Genetic correlation; Selection index; Ganadería; Doctorado.

Ano: 2013

URL: http://hdl.handle.net/10521/2128

Resistencia de clones de papa al tizón tardío (Phytophthora infestans) y su caracterización morfológica en el Valle de Toluca.

Rivadeneira Ruales, Jorge Esteban.

El rendimiento, la resistencia a enfermedades y la calidad del tubérculo son las características más importantes en el mejoramiento genético de la papa (Solanum tuberosum); por ello, el objetivo de la presente investigación fue estudiar los componentes de varianza y heredabilidad en sentido estrecho (h2) de la respuesta a Phytophthora infestans, así como la caracterización morfológica de clones resistentes, así como seleccionar los clones con resistencia y buenas características agronómicas. Se evaluaron 198 clones en primera generación clonal de 20 cruzas, y 13 de los 20 progenitores en el campo experimental del Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), en el valle de Toluca, Estado de México. Más del 30% de clones...

Palavras-chave: Solanum tuberosum; Phytophthora infestans; Resistencia; Tizón tardío; Heredabilidad; Diversidad genética; Clones; Cruzas; Progenitor; Resistance; Late blight; Heritability; Genetic diversity; Clones; Crosses; Parent; Maestría; Genética.

Ano: 2011

URL: http://hdl.handle.net/10521/505

Parámetros genéticos e interacción genotipo x ambiente en el crecimiento de progenies reintroducidas y nativas de Pinus patula.

Efectos de aptitud combinatoria y de interacción genotipo x ambiente en maíz para provitamina A y rendimiento.

Gómez Martínez, Procoro.

Pinus patula Schiede ex Schltdl. et. Cham., es una especie nativa de México ampliamente utilizada en plantaciones comerciales en diferentes regiones del mundo; la especie ha sido mejorada en el extranjero, y es necesario evaluar el material al ser reintroducido a su país de origen. Se comparó el crecimiento de 36 familias de medios hermanos seleccionadas en Colombia y Sudáfrica, reintroducidas en México (grupo R) y 36 familias de medios hermanos escogidas fenotípicamente en rodales naturales (grupo N), en dos sitios con ambientes contrastantes: Aquixtla, Puebla, a 2,930 m (S1) y Acaxochitlán, Hidalgo, a 2,260 m (S2). Se midió el diámetro normal, la altura total y el volumen del fuste a los siete y ocho años de edad, y la conformación del árbol y el número...

Palavras-chave: Análisis de estabilidad; Correlación genética tipo B; Crecimiento; Ganancia genética; Heredabilidad; IGA; Parámetros genéticos; Pinus patula; Progenies; Reintroducción; Adaptation; Ecovalence; Genetic stability; Genetic gain; Genetic parameters; Growth rate; GEI; Heritability; Progeny test; Type-B genetic correlation; Reintroduction; Forestal; Maestría.

Ano: 2013

URL: http://hdl.handle.net/10521/1892

Parámetros genéticos en características de crecimiento y densidad de la madera en progenies de Eucalyptus grandis

Mingramm Yarza, Germán.

Con la finalidad de evaluar la aptitud combinatoria y los efectos entre genotipo y medio ambiente en maíz, en relación con la provitamina A y rendimiento, la presente investigación se realizó utilizando las cruzas de 38 líneas (22 pertenecientes al grupo heterótico A y 16 al grupo heterótico B) con tres probadores cada una. Los híbridos formados se evaluaron en cuatro ensayos (tres del grupo heterótico A y uno del grupo heterótico B) bajo un diseño de bloques incompletos al azar. Cada ensayo se sembró en cuatro ambientes dentro de dos localidades (Tlaltizapán, Morelos– condiciones normales y labranza de conservación; y Agua Fría, Puebla– condiciones normales y de estrés hídrico). Los híbridos se evaluaron para rendimiento, días a floración y altura de...

Palavras-chave: Zea mays; Carotenos; Heredabilidad; Aditividad; Carotenes; Heritability; Additivity; Producción de Semillas; Maestría.

Ano: 2012

URL: http://hdl.handle.net/10521/777

Resistencia de clones de papa al tizón tardío (Phytophthora infestans) y su caracterización morfológica en el Valle de Toluca.

Harrand, Leonel.

Con el fin de determinar la estructura genética de las características de crecimiento y densidad de la madera (evaluada de manera directa y a través de la penetración del Pilodyn) y estimar la respuesta esperada a la selección masal en una población de Eucalyptus grandis formada por familias del NE de Queensland (Australia), se evaluó un ensayo de progenies a los 4.5 y 8.5 años de edad, establecido en tres sitios del NE argentino. Aunque se encontró una amplia variabilidad genética en todas las características evaluadas, las características de crecimiento [diámetro (DAP), altura (HT) y volumen (VOL)] mostraron diferente estructura y grado de control genético con respecto a las otras características [rectitud de fuste (FORM), proporción de corteza (COR) y...

Tipo: Tesis

Palavras-chave: Heredabilidad; Correlación genética; Correlación edad-edad; Estabilidad genética; Respuesta a la selección; Selección indirecta; Selección temprana; Densidad de la madera; Pilodyn; Maestría; Forestal; Heritability; Genetic correlation; Age-age correlation; Genetic stability; Response to selection; Indirect selection; Early selection; Wood density.

Ano: 2007

URL: http://hdl.handle.net/10521/1648

Rivadeneira Ruales, Jorge Esteban.

Ano: 2011

URL: http://hdl.handle.net/10521/505

Genetic parameters for five traits in Africanized honeybees using Bayesian inference

Padilha,Alessandro Haiduck; Sattler,Aroni; Cobuci,Jaime Araújo; McManus,Concepta Margaret.

Heritability and genetic correlations for honey (HP) and propolis production (PP), hygienic behavior (HB), syrupcollection rate (SCR) and percentage of mites on adult bees (PMAB) of a population of Africanized honeybees were estimated. Data from 110 queen bees over three generations were evaluated. Single and multi-trait models were analyzed by Bayesian Inference using MTGSAM. The localization of the hive was significant for SCR and HB and highly significant for PP. Season-year was highly significant only for SCR. The number of frames with bees was significant for HP and PP, including SCR. The heritability estimates were 0.16 for HP, 0.23 for SCR, 0.52 for HB, 0.66 for PP, and 0.13 for PMAB. The genetic correlations were positive among productive traits...

Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex

Palavras-chave: Heritability; Genetic correlations; Environmental effects; Apis mellifera.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000200011

Godoi,Cláudio Roberto Cardoso de; Pinheiro,José Baldin.

Soybean genotypes resistant to stink bugs are derived from complex breeding processes obtained through indirect selection. The aim of the present work was to estimate genetic parameters for guiding selection strategies towards resistant genotypes, based on those traits associated with responses to pod-attacking stink bugs, such as the grain filling period (GFP), leaf retention (LR), percentage index of pod damage (PIPD) and percentage of spotted seeds (PSS). We assessed the parental lines IAC-100 (resistant) and FT-Estrela (susceptible), the progenies F2 and F4, 30 progenies F2:3, 30 progenies BC1F2:3 and 30 progenies BC2F2:3, besides the cultivars BRS Celeste and MGBR-46 (Conquista). Three field experiments, using randomized complete block design with...

The influence of animals from embryo transfer on the genetic evaluation of growth in Simmental beef cattle by using multi-trait models

Palavras-chave: Glycine max; Insect resistance; Stink bugs; Heritability.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200020

Mota,Rodrigo Reis; Lopes,Paulo Sávio; Marques,Luiz Fernando Aarão; Silva,Luciano Pinheiro da; Resende,Marcos Deon Vilela de; Torres,Robledo de Almeida.

The weight records from Simmental beef cattle were used in a genetic evaluation of growth with or without the inclusion of animals obtained by embryo transfer. A multi-trait model in which embryo transfer individuals were excluded (MTM1) contained 29,510 records from 10,659 animals, while another model without exclusion of these animals (MTM2) contained 62,895 weight records from 23,160 animals. The weight records were adjusted for ages of 100, 205, 365, 450, 550 and 730 days. The (co)variance components and genetic parameters were estimated by the restricted maximum likelihood method. The (co)variance components were similar in both models, except for maternal permanent environment variance. Direct heritabilities (h²d) in MTM1 were 0.04, 0.11, 0.20, 0.27,...

Phenotypic recurrent selection in the common bean (Phaseolus vulgaris L) with carioca-type grains for resistance to the fungi Phaeoisariopsis griseola

Palavras-chave: Body weight; (co)variance components; Heritability.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100007

Amaro,Geovani Bernardo; Abreu,Ângela de Fátima Barbosa; Ramalho,Magno Antonio Patto; Silva,Flávia Barbosa.

The efficiency of recurrent selection was assessed in obtaining common bean (Phaseolus vulgaris L) plant lines resistant to the phytopathogenic fungi Phaeoisariopsis griseola. The base bean population was obtained from the partial diallel between seven lines with carioca-type grains and 10 sources of resistance to P. griseola. The plants most resistant to the pathogen were selected in the F2 (S0) generation of the populations (C-0). The best S0:1 plants that presented carioca-type grains were intercrossed to obtain cycle I (C-I). The same procedure was adopted to obtain cycles C-II to C-V. In each recurrent selection cycle, S0:1 progenies selected were also assessed in experiments carried out in Lavras, Brazil, always using as check the Carioca MG...

Quantitative inheritance of some wheat plant traits

Palavras-chave: Angular-leaf-spot; Grain yield; Heritability; Phaseolus vulgaris; Response to selection.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400014

Novoselovic,D.; Baric,Marijana; Drezner,G.; Gunjaca,J.; Lalic,A..

The objective of this study was to estimate gene effects and genetic variability for some quantitative traits of two winter wheat crosses (Soissons/Zitarka and Soissons/Sana) by generation mean analysis. In most cases a digenic epistatic model was sufficient to explain variation in generation means. The additive-dominance model was adequate for plant height and grain weight per spike of the longest culm. In two cases (grain yield per plant and single grain weight) these models failed to explain variation in generation means, implying the presence of higher order interactions or interactions between linked loci. Dominance effects and additive x additive epistasis were more important than additive effects and other epistatic components. Only complementary...

Genetic analyses of days to calving and their relationships with other traits in a Canchim cattle herd

Palavras-chave: Wheat; Quantitative traits; Joint scaling test; Gene effects; Heritability.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100015

Mucari,Talita Buttarello; Alencar,Maurício Mello de; Barbosa,Pedro Franklin; Barbosa,Rogério Taveira.

Heritabilities and genetic correlations in a Canchim beef cattle herd were estimated using data on the following traits: male scrotal circumference at twelve months (SC12); days to first calving (DFC) for heifers; days to calving (DC) for cows; male and female weight (W) at twelve months (W12); heifer weight at the start of the first breeding season (WFBS) and at first calving (WFC); and cow weight at the start of the breeding season (WBS) and at calving (WC). Analyses of the DFC and DC traits were carried out excluding and including penalized (DFC P and DC P) non-calving females. The restricted maximum likelihood method was used, applying one-trait models for the DFC and DC analyses and two-trait models for analyses of DFC and DC combined with the other...

Genetic analysis of the infestation of females of the Caracu cattle breed by Horn Fly (Haematobia irritans irritans) (L.) (Diptera, Muscidae)

Palavras-chave: Beef cattle; Body weight; Days to calving; Days to first calving; Genetic correlation; Heritability; Scrotal circumference.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600007

Fraga,Angelina Bossi; Alencar,Maurício Mello de; Figueiredo,Leopoldo Andrade de; Razook,Alexander George; Cyrillo,Joslaine Noely dos Santos Gonçalves.

The objective of this study was to evaluate environmental factors that affect infestation of Caracu cattle breed by horn fly (Haematobia irritans) and to estimate genetic parameters for level of infestation. Infestation was evaluated on females from two herds in two consecutive years. Total number of flies on animals (FC) was counted, an infestation score (FS: 1 to 5) was recorded according to the estimated number of flies on animals, and number of parasites in photographs (FF) taken when the animals were evaluated was also counted. On each animal from one to eight observations were taken. A total of 3,836, 2,751 and 3,754 records from 718 animals were obtained for FC, FF and FS, respectively. The incidence of flies was lower during winter and higher...

Effect of lactation length adjustment procedures on genetic parameter estimates for buffalo milk yield

Palavras-chave: Genetic correlation; Heritability; Horn fly counts; Repeatability.

Ano: 2005

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200011

Baldi,Fernando; Laureano,Monyka Marianna Massolini; Gordo,Daniel Gustavo Mansan; Bignardi,Annaiza Braga; Borquis,Rusbel Raul Aspilcueta; Albuquerque,Lucia Galvão de; Tonhati,Humberto.

The objectives of this study were to estimate the genetic parameters for milk yield unadjusted and adjusted for days in milk and, subsequently, to assess the influence of adjusting for days in milk on sire rank. Complete lactations from 90 or 150 days of lactation to 270 or 350 days in milk were considered in these analyses. Milk yield was adjusted for days in milk by multiplicative correction factors, or by including lactation length as a covariable in the model. Milk yields adjusted by different procedures were considered as different traits. Heritability estimates varied from 0.17 to 0.28. Genetic correlation estimates between milk yields unadjusted and adjusted for days in milk were greater than 0.82. Adjusting for days in milk affected the parameter...

Partitioning genetic effects due to embryo, cytoplasm and maternal parent for oil content in oilseed rape (Brassica napus L.)

Palavras-chave: Genetic correlations; Heritability; Lactation length; Milk production; Rank correlations.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100012

Wu,Jian-Guo; Shi,Chun-Hai; Zhang,Hai-Zhen.

Analysis of genetic main effects and genotype x environment (GE) interaction effects on the oil content of oilseed rape (Brassica napus L.) was conducted by using a genetic model for the quantitative traits of seeds in diploid plants. The experiments were carried out over two years with 8 parents and a diallel mating design, which produced F1 and F2 generations. We found that the oil content of rape was simultaneously controlled by embryo genetic effect, cytoplasmic effects and maternal genetic effect as well as GE interaction effects, with the cytoplasmic and maternal effects playing the main role. The results indicate that selection of maternal plants for high oil content would be more efficient than selection based on single seeds. Since the GE...

Genetic parameters for faecal egg count, packed-cell volume and body-weight in Santa Inês lambs

Palavras-chave: Breeding selection; Environmental interactions; Heritability; QTL.

Ano: 2006

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300023

Lôbo,Raimundo N.B.; Vieira,Luiz S.; Oliveira,Amaury A. de; Muniz,Evandro N.; Silva,José M. da.

Worm infection is one of the main factors responsible for economic losses in sheep breeding in Brazil. Random regression analysis was used to estimate genetic parameters for the factors faecal egg-count (FEC), packed-cell volume (PCV) and body weight (BW) in Santa Inês lambs. Data from 119 female, offspring of nine rams, were collected between December, 2005 and December, 2006, from the experimental flock of Embrapa Tabuleiros Costeiros, the Brazilian Agricultural Research Corporation located in Frei Paulo, SE, Brazil. After weaning, females were drenched until the faecal egg count had dropped to zero. Two natural challenges were undertaken. FEC heritability was extremely variable, this increasing from 0.04 to 0.27 in the first challenge and from 0.01 to...

Genetic variation in growth traits and yield of rubber trees (Hevea brasiliensis) growing in the Brazilian state of São Paulo

Palavras-chave: Genetic correlations; Heritability; Legendre polynomials; Random regression.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200014

Gonçalves,Paulo de Souza; Moraes,Mário Luiz Teixeira de; Bortoletto,Nelson; Costa,Reginaldo Brito da; Gonçalves,Elaine Cristine Pifer.

Analysis of variance and covariance was preformed on growth traits (stem girth, bark thickness, total height gain and rubber yield) of 22 open-pollinated progenies of the rubber tree Hevea brasiliensis from an Asian Hevea collection introduced to Agronomic Institute (Instituto Agronômico, Campinas, São Paulo, Brazil; IAC) in 1952. This progeny trial was replicated at three sites in São Paulo state and it was found that at three years from sowing there was statistically significant variation for girth, bark thickness, height and rubber yield. An individual test sites, values of individual plant heritability for girth ranged from h= 0.36 to h= 0.89 whereas values for heritability for progeny means ranged from h= 0.77 to h= 0.87. These moderate and high...

The quantitative genetic basis of female and male body size and their implications on the evolution of body size dimorphism in the house cricket Acheta domesticus (Gryllidae)

Palavras-chave: Hevea brasiliensis; Rubber tree; Heritability; Genetic parameters.

Ano: 2005

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500019

Castillo,Raúl Cueva del.

Few theoretical and experimental studies have analyzed the genetic basis of body size dimorphism. Since the evolutionary response to selection depends of the genetic variance in a population it is to be expected that traits under selection would have smaller genetic variance than traits not affected by selection. The evolution of sexual size dimorphism is affected by the genetic correlation between females and males, with the most dimorphic traits showing smaller genetic correlations between the sexes. As result of the differences in the intensity of sexual selection between the sexes, it is expected that the levels of genetic variance would be larger in females than males. I analyzed the genetic additive variance underlying six traits of Acheta...

Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil

Palavras-chave: Acheta domesticus; Body size; Dimorphism; Heritability; Sexual selection.

Ano: 2005

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500030

Gonçalves,Paulo de Souza; Martins,Antonio Lúcio Mello; Bortoletto,Nelson; Saes,Luis Alberto.

Five yield traits were investigated in three-year-old progenies from open-pollinated rubber trees [Hevea brasiliensis (Willd. ex Adr. de Juss) Muell.-Arg.]. Twenty progenies were evaluated in a randomized, complete block design replicated three times using 10 plants per linear plot at the North Central Experimental Station in Pindorama, São Paulo State, Brazil. The characters evaluated included the average yield of rubber, growth vigor, bark thickness, total number of latex vessel rings and latex vessel size. Highly significant (p < 0.01) genetic differences were observed among progenies for most traits. The genotypic variance components accounted for 13.2%, 12.3%, 9.4%, 3.4% and 0.23% of the phenotypic variance for yield, growth vigor, bark thickness,...

Genetic parameters for growth, reproductive and maternal traits in a multibreed meat sheep population

Palavras-chave: Hevea brasiliensis; Rubber tree; Heritability; Genetic parameters.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200014

Lôbo,Ana Maria Bezerra Oliveira; Lôbo,Raimundo Nonato Braga; Paiva,Samuel Rezende; Oliveira,Sônia Maria Pinheiro de; Facó,Olivardo.

The genetic parameters for growth, reproductive and maternal traits in a multibreed meat sheep population were estimated by applying the Average Information Restricted Maximum Likelihood method to an animal model. Data from a flock supported by the Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC) were used. The traits studied included birth weight (BW), weaning weight (WW), slaughter weight (SW), yearling weight (YW), weight gain from birth to weaning (GBW), weight gain from weaning to slaughter (GWS), weight gain from weaning to yearling (GWY), age at first lambing (AFL), lambing interval (LI), gestation length (GL), lambing date (LD - number of days between the start of breeding season and lambing), litter weight at birth (LWB)...