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Search Results: 1 - 10 of 6670 matches for " combined selection "
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Predi??o de ganhos genéticos por índices de sele??o na popula??o de milho pipoca UNB-2U sob sele??o recorrente
Santos, Fabrício Santana;Amaral Júnior, Antonio Teixeira do;Freitas Júnior, Silvério de Paiva;Rangel, Ramon Macedo;Pereira, Messia Gonzaga;
Bragantia , 2007, DOI: 10.1590/S0006-87052007000300004
Abstract: aiming to select superior progenies for concentration of favorable alleles in a popcorn population on the third cycle of intrapopulation half-sib recurrent selection, one hundred and ninety-two progenies were evaluated in a completed randomized design with two replications, in two distinct environments: colégio estadual agrícola ant?nio sarlo, located in campos dos goytacazes, and experimental station of pesagro-rio, located in itaocara, rio de janeiro state, in 2004/05. the selection intensity was 15.6% that keep in touch thirty half-sib families for the continuity of the breeding program. the utilized selection indexes were the smith and hazel, pesek and baker, williams, and mulamba and mock. the mulamba and mock index propitiated more elevated magnitudes of the predicted gains for most of the traits, including popping expansion and grain yield, with values of 7.16% and 10.00%, respectively, utilizing arbitrary weight attributed by tentative.
A study of combined evaluation of suppliers based on correlation
Heting Qiu,Xuewei Li
Journal of Industrial Engineering and Management , 2013, DOI: 10.3926/jiem.680
Abstract: Purpose: The Selection of logistics service providers is an important issue in supply chain management. But different evaluation methods may lead to different results, which could cause inconsistent conclusions. This paper makes use of a new perspective to combine with a variety of methods to eliminate the deviation of different single evaluation methods. Design/methodology/approach: This paper expounds the application of the combined evaluation method based on correlation. Entropy method, factor analysis, grey colligation evaluation and AHP have been used for research. Findings: According to the evaluate result, the ranking of suppliers obtained by each method have obvious differences. The result shows that combined evaluation method can eliminate the deviation of different single evaluation methods. Originality/value: The combined evaluation method makes up for the defects of single evaluation methods and obtains a result that is more stable and creditable with smaller deviation. This study can provide the enterprise leaders with more scientific method to select their cooperative companies.
COMPARISON BETWEEN AND WITHIN FAMILY SELECTIONS WITH THE COMBINED SELECTION IN PROGENY TESTS OF Eucalyptus grandis
Ildeu Soares Martins,Cosme Dami?o Cruz,Maria das Gra?as de Barros Rocha,Adair José Regazzi
CERNE , 2005,
Abstract: This study used six experiments involving half-sub families of Eucalyptus grandis, which were carried out byCelulose Nipo Brasileira S. A. (CENIBRA) at six locations. Data on circumference at breast height and plant height weremeasured. Selection methods among and within families were compared with combined selection. The combined selection wassuperior to selection among and within families due to higher estimates of genetic gains, and also for selecting a larger numberof families for recombination.
Alternativas para la selección masal y selección combinada de familias de medios hermanos en maíz
Márquez Sánchez, Fidel;
Revista mexicana de ciencias agrícolas , 2011,
Abstract: in this work alternative methods to carry out bulk and family selection in corn are described. the aim of mass selection is to diminish difference among effects of genetic-environmental interaction between plants and it is proposed to make selection of the best contiguous ears along complete furrow. in the method of combined selection of half siblings families, if detasseling is not applied the derived endogamy of the self-fecundation is not affected, which means an important saving in manpower payment.
Obtaining pepper F2:3 lines with resistance to the bacterial spot using the pedigree method
Riva-Souza, Elaine M;Rodrigues, Rosana;Sudré, Cláudia P;Pereira, Messias G;Viana, Alexandre P;Amaral Júnior, Ant?nio T do;
Horticultura Brasileira , 2007, DOI: 10.1590/S0102-05362007000400014
Abstract: the economic importance of sweet pepper is rising in brazil and abroad. nevertheless, diseases, such as the bacterial spot (xanthomonas campestris pv. vesicatoria or xanthomonas euvesicatoria) jeopardize its yield. an efficient method for controlling the disease is the use of resistant varieties. the objective of this work was to select sweet pepper genotypes with resistance to the bacterial spot on a segregating population (capsicum annum accessions uenf 1421, susceptible, x uenf 1381, resistant), advanced using the pedigree method. three selection procedures, " selection between and within families" , " mass selection" , and " combined selection" were compared. fifty-six f2:3 families (40 plants per family) were planted in the field, without replication. ten plants of each genitor were used as controls in each line, between families. plants were inoculated (isolate ena 4135) 42 days after transplanting and leaves were collected and digitalized three weeks after. images were analyzed to obtain the percentage of leaf tissue damaged (rmb%) and leaf damaged area (rmbcm2). since similar results were achieved using either rmb% or rmbcm2, we suggest using rmb% in further studies instead of rmbcm2, which values remain close to zero. eleven lines had promising results when selection within and among f2:3 families was used (genetic gains = 40%). considering mass selection, eleven individuals (three lines), were selected (genetic gains = 28%). based on combined selection, three lines (11 individuals within the lines) were selected (genetic gains = 266%). there were three lines (105, 475, and 517) in common between selection among and within families and mass selection, and another three (111, 260, and 313), between selection among and within families and combined selection. combined selection was 6.6 (rmb%) and 6.5 (rmbcm2) times more efficient than selection among and between families, and 9.6 (rmb%) and 9.5 (rmbcm2) times more efficient than mass selection.
Estimativas de ganho genético por diferentes critérios de sele??o em genótipos de alfafa
Vasconcelos, Edmar Soares de;Ferreira, Reinaldo de Paula;Cruz, Cosme Dami?o;Moreira, Ad?nis;Rassini, Joaquim Bartolomeu;Freitas, Alfredo Ribeiro de;
Revista Ceres , 2010, DOI: 10.1590/S0034-737X2010000200011
Abstract: this study aimed to compare different selection criteria, indicate the selection method that provides larger estimates of genetic progress and identify superior genotypes for the evaluated morphological and bromatological characteristics. the experiment was conducted at embrapa pecuária sudeste, s?o carlos, s?o paulo state, brazil in a randomized blocks design, with two replicates. the evaluated characteristics were dry matter production, plant height, tolerance to diseases, fenotypic acceptance by animals, protein content, in vitro dry-matter digestibility, neutral detergent fiber and the stem/leaf relationship of ninety two alfalfa cultivars from inta, argentina. cultivar crioula was used as control.. mulamba & mock, distance from genotype to ideotype and elston were most appropriate indexes for this type of study. the genotypes sequel, cuf 101, siriver 2, florida 77, diamond, sequel 2, le n 2, medina, kern, rio grande, dk 166, dk 181, perla sp inta, wl 516, rocio, le semit 711 and le n 3 were indicated for the selection considering the highest indexes obtained by mulamba & mock, distance from genotype to ideotype and elston.
Prediction of genetic gain from selection indices for disease resistance in papaya hybrids
Vivas, Marcelo;Silveira, Silvaldo Felipe da;Pereira, Messias Gonzaga;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000600007
Abstract: in order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. genetic gains were estimated from the selection indices of smith & hazel, pesek & baker, williams, mulamba & mock, with selection intensity of 22.39%, corresponding to 15 hybrids. the index of mulamba & mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. in addition, there were gains for other characteristics, with negative predicted selective percentage gain. the results showed that the index of mulamba & mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot.
Eficiências relativas de métodos de sele o de famílias endogamicas em milho-pipoca = Relative efficiencies of selection methods of inbred families in popcorn
Emmanuel Arnhold,José Marcelo Soriano Viana,Ricardo Gon?alves Silva,Freddy Mora
Acta Scientiarum : Agronomy , 2009,
Abstract: Objetivou-se avaliar a eficiência relativa da sele o massal, entre e dentro e de um novo índice de sele o combinada proposto. O índice, baseado na genealogia, foi obtido por: IC = b1 PSn-1 + b2PFSn , em que PSn-1 é o valor fenotípico da planta Sn – 1; PFSn é o valor fenotípico da família Sn descendente da planta Sn – 1; b1 é o peso do valor fenotípico individual; e b2 é o peso do valor fenotípico de família Sn. Os pesos foram obtidos por deriva o, pressupondo que os mesmos minimizam a variancia da diferen a entre o índice eo valor genético aditivo da planta Sn – 1. Para comparar os métodos, utilizaram-se famílias e plantas endogamicas, obtidas da popula o Vi osa. Fez-se sele o em capacidade de expans o, utilizando os três métodos nas gera es S1, S2, S3 e S4, e avaliou-se a eficiência dosmétodos comparando médias em capacidade de expans o de famílias descendentes de selecionadas por cada método em S2, S3, S4 e S5. Para compara o de médias, utilizou-se o teste t ao nível de 5% de probabilidade. Concluiu-se que a sele o combinada proposta foisuperior à sele o massal e foi, em geral, superior à sele o entre e dentro. A sele o entre e dentro foi, geralmente, superior à sele o massal. The study aimed to evaluate the relative efficiency of mass selection, among, within and of proposed new index of combined selection. The index, based on genealogy, was obtained by: IC = b1 PSn-1 + b2PFSn , wherePSn-1 is the phenotypic value of the plantSn-1; PFSn is the phenotypic value of the Sn family, descendant of the Sn-1 plant; b1 is the weight of the individual phenotypic value, and b2 it is the weight of the phenotypic value of Sn family. The weights were obtained by derivation, assuming that they minimize thevariance of the difference between the index and the value of the plant genetic additive Sn-1. To compare the methods, families and inbred plants were used, obtained from the population of Vi osa. A selection was made for popping expansion, using the three methodsin S1, S2, S3 and S4 generations, and the efficiency of the methods of comparing averages in popping expansion of descendants of families selected by each method in S2, S3, S4 and S5 was assessed. For comparison of averages, the t-test at 5% of probability was used. It is concluded that the combined selection proposal was superior to the mass selection and was, in general, higher than the selection among and within. The selection among and within was, in general, higher than the mass selection.
Alternativas para la selección masal y selección combinada de familias de medios hermanos en maíz Alternatives for mass selection and combined selection of half families in maize
Fidel Márquez Sánchez
Revista mexicana de ciencias agrícolas , 2011,
Abstract: Se describen métodos alternativos para realizar la selección masal y familial en maíz. En la selección masal se busca disminuir la diferencia entre los efectos de interacción genético-ambiental entre plantas y se propone hacer la selección de las mejores mazorcas contiguas a lo largo del surco completo. En el método de selección combinada de familias de medios hermanos, si no se desespiga la endogamia derivada de la autofecundación no es afectada, lo cual significa un ahorro importante en el pago de mano de obra. In this work alternative methods to carry out bulk and family selection in corn are described. The aim of mass selection is to diminish difference among effects of genetic-environmental interaction between plants and it is proposed to make selection of the best contiguous ears along complete furrow. In the method of combined selection of half siblings families, if detasseling is not applied the derived endogamy of the self-fecundation is not affected, which means an important saving in manpower payment.
Psycho-Physiological Combined Therapy on the Sexual Desire  [PDF]
Roohallah Bay, Shaiful Bahari Ismail, Fatemeh Bay
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.36049
Abstract:

Objective: Hypoactive Sexual Desire is characterized as a lack or absence of sexual fantasies and desire for sexual activity. The current study examines the effects of psycho-physiological therapy (stretch therapy combined with breathing exercise) on the sexual desire among heterosexual men. Methods: We used “convenience sampling” for this research; 80 people were recruited. For collection of data, we used an identical quasi-experimental design called “nonequivalent control group.” Therapy sessions each lasting (20) 90 to 120 min were carried out on 3 alternate days of week. The volunteers have been selected from heterosexual men with stable relationship, those who married minimum of 6 months, within 20 to 55 years old, who attended to HUSM Family Clinic. Pre-tests, post-tests, and follow-up tests were conducted in a HUSM clinic (Malaysia). For assessment we used Hurlbert Index of Sexual Desire (HISD). Results: The psycho-physiological group had better post-test scores compared to the control group. Also follow-up test scores were marginally better compared to the control group, but this difference did not reach statistical significance. Also age and education level of participants didn’t have any significant effect on this intervention.

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