Obtaining okra hybrids through partial diallel analysis

The theory of variance analysis of partial diallel tables, following Hayman's proposal of 1954, is presented. As several statistical tests yield similar inferences, the present analysis mainly proposes to assess genetic variability in two groups of parents and to study specific, varietal and mean heteroses. Testing the nullity of specific heteroses equals testing absence of dominance. Testing equality of varietal heteroses of the parents of a group is equivalent to testing the hypothesis that in the other group allelic genes have the same frequency. Rejection of the hypothesis that the mean heterosis is null indicates dominance. The information obtained complements that provided by diallel analysis involving parents and their F1 hybrids or F2 generations. An example with the common bean is included.

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Correlations and selection of parents to technological traits of upland cotton

Ciência Rural ◽

10.1590/0103-8478cr20180701 ◽

2019 ◽

Vol 49 (6) ◽

Author(s):

Luiz Paulo de Carvalho ◽

Francisco José Correia Farias ◽

Josiane Isabela Silva Rodrigues ◽

Katiane Secco Castro ◽

Alan Mario Zuffo ◽

...

Keyword(s):

Textile Industry ◽

Upland Cotton ◽

Fiber Strength ◽

Diallel Analysis ◽

Additive Effects ◽

Lint Percentage ◽

Medium Length ◽

The Mean ◽

Selection Of ◽

Partial Diallel

ABSTRACT: Technological traits improvement of cotton fiber is a constant demand by textile industry. This research aimed to identify the potential of improved materials with high lint percentage to contribute with alleles that increase the lint percentage in Extra long staple fiber (ELS) upland cotton. Two contrasting materials for lint percentage (LP) and fiber length (FL) were used, one with long fiber and a low lint percentage (parent A) and another with high lint percentage and medium length (parent B). The following variables were evaluated: lint percentage (LP), upper half mean length (UHML), fiber uniformity (FU), fiber strength (FS), and elongation (EL). Diallel analysis was performed using the Griffing’s Method 4 adapted to partial diallel. Additive effects were predominant over non-additive effects. The mean LP was higher when using parent B. The opposite occurred for UHML. A negative correlation was detected between LP and UHML, showing the difficulty of obtaining genetic gain for both traits at the same time.

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Potential of parents and hybrids experimental of the yellow melon

Ciência Rural ◽

10.1590/0103-8478cr20190452 ◽

2020 ◽

Vol 50 (2) ◽

Author(s):

José Galdino Cavalcante Neto ◽

Karmita Thainá Correia Ferreira ◽

Fernando Antonio Souza de Aragão ◽

Rafaela Priscila Antônio ◽

Glauber Henrique de Sousa Nunes

Keyword(s):

Combining Ability ◽

Cucumis Melo ◽

Diallel Analysis ◽

Fruit Weight ◽

General Combining Ability ◽

Economic Importance ◽

Additive Effects ◽

Agronomic Potential ◽

Cucumis Melo L ◽

Partial Diallel

ABSTRACT: Melon or muskmelon (Cucumis melo L.) is of considerable economic importance in Brazil. Nearly all the cultivars currently grown are hybrids. Heterosis has been used to advantage in the melon plant, and the use of uniform hybrids is one of the reasons for successful cultivation. The aim of the present study was to evaluate the agronomic potential of yellow melon lines and hybrids. An experiment was conducted in randomized blocks with three replications to evaluate 24 hybrids generated by crosses among three elite lines used as female parents (AF-01, AF-02, and AF-03) and eight lines used as male parents (LAM-01, LAM-02, LAM-03, LAM-04, LAM-05, LAM-06, LAM-07, and LAM-08). Yield and fruit quality traits were evaluated. Partial diallel analysis was carried out to estimate general combining ability and specific combining ability. Additive and non-additive effects were observed for the yield, mean fruit weight, and pulp thickness traits. The lines AF-02, LAM-02, and LAM-03 are the most promising as parents as they more frequently have favorable alleles. The most prominent hybrids in diallel analysis were AF-02 x LAM-02, AF-02 x LAM-03, AF-02 x LAM-04, and AF-03 x LAM-06.

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Partial diallel analysis among maize lines for characteristics related to the tassel and the productivity

African Journal of Agricultural Research ◽

10.5897/ajar2014.10314 ◽

2016 ◽

Vol 11 (11) ◽

pp. 974-982 ◽

Cited By ~ 2

Author(s):

Nardino Maicon ◽

Queir oacute z de Souza Velci ◽

Baretta Diego ◽

Antonio Konflanz Valmor ◽

Nicolau Follmann Diego ◽

...

Keyword(s):

Diallel Analysis ◽

Partial Diallel

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Stock-scion interactions on growth and rubber yield of Hevea brasiliensis

Scientia Agricola ◽

10.1590/s0103-90162007000300004 ◽

2007 ◽

Vol 64 (3) ◽

pp. 235-240 ◽

Cited By ~ 9

Author(s):

Átila Bento Beleti Cardinal ◽

Paulo de Souza Gonçalves ◽

Antônio Lúcio Mello Martins

Keyword(s):

Vegetative Propagation ◽

Hevea Brasiliensis ◽

Rubber Tree ◽

Diallel Analysis ◽

High Productivity ◽

Similar Performance ◽

Growth Vigor ◽

High Yields ◽

Partial Diallel ◽

Plot Design

Rubber tree cultivation [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg.] uses mostly the budding propagation method, however the expected stand uniformity due to the use of vegetative propagation is theoretical, since high variation for yield and vigor is caused by rootstock influence. The objective of this study was to assess several combinations between clonal rootstocks and clone scions through diallel analysis, aiming at high productivity and vigor. Data consisted of five years of dry rubber yield and girth at panel opening from an experiment using a split-plot design with four replications, conducted at Pindorama, SP, Brazil, considering six rootstocks (GT 1, IAN 873, PB 235, RRIM 600, RRIM 701 and unselected seedlings) and six scions (GT 1, IAN 873, PB 235, PR 107, RRIM 600 and RRIM 701). A 6 <FONT FACE=Symbol>´</FONT> 6 partial diallel analysis summing up 36 combinations was undertaken, and general compatibility for each group of materials (rootstocks and scions) and specific compatibility among all combinations were estimated. The results have shown that PB 235 and IAN 873 rootstocks provided high yields and general compatibility values (7.9348 and 2.7647, respectively). The use of unselected seedlings as rootstocks is not recommended because they presented very low compatibility values for dry rubber yield. Towards growth vigor, the tested rootstocks have shown similar performance.

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Theory and analysis of partial diallel crosses

Genetics and Molecular Biology ◽

10.1590/s1415-47571999000400021 ◽

1999 ◽

Vol 22 (4) ◽

pp. 591-599 ◽

Cited By ~ 9

Author(s):

José Marcelo Soriano Viana ◽

Cosme Damião Cruz ◽

Antonio Américo Cardoso

Keyword(s):

Relative Number ◽

Diallel Analysis ◽

F1 Hybrids ◽

Genotypic Differences ◽

Diallel Crosses ◽

Genetic Components ◽

Recessive Genes ◽

Using Data ◽

Dominant Genes ◽

Partial Diallel

This study presents theory and analysis of partial diallel crosses based on Hayman's methods. This genetic design consists of crosses among two parental groups. It should be used when there are two groups of parents, for example, dent and flint maize inbred lines, and the breeder is not interested in the assessment of crosses between parents of the same group. Analyses are carried out using data from the parents and their F1 hybrids allowing a detailed characterization of the polygenic systems under study and the choice of parents for hybridization. Diallel analysis allows the estimation of genetic and non-genetic components of variation and genetic parameters and to assess the following: genetic variability in each group; genotypic differences between parents of distinct groups; if a parent has a common or a rare genotype in the group to which it does not belong; if there is dominance; if dominant genes increase or decrease trait expression (direction of dominance); average degree of dominance in each group; the relative importance of mean effects of genes and dominance in determining a trait; if, in each group, the allelic genes have the same frequency; if genes are equally frequent in the two groups; the group with the greatest frequency of favorable genes; the group in which dominant genes are most frequent; the relative number of dominant and recessive genes in each parent; if a parent has a common or a rare genotype in the group to which it belongs, and the genotypic differences between parents of the same group. An example with common bean varieties is considered.

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Diallel and partial diallel analysis of some yield factors in Linum Usitatissimum

Heredity ◽

10.1038/hdy.1967.3 ◽

1967 ◽

Vol 22 (1) ◽

pp. 35-41 ◽

Cited By ~ 8

Author(s):

B R Murty ◽

V Arunachalam ◽

I J Anand

Keyword(s):

Linum Usitatissimum ◽

Diallel Analysis ◽

Partial Diallel

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Heterosis and combining ability analyses from the partial diallel

Bragantia ◽

10.1590/s0006-87052007000100007 ◽

2007 ◽

Vol 66 (1) ◽

pp. 641-647 ◽

Cited By ~ 5

Author(s):

José Marcelo Soriano Viana

Keyword(s):

Combining Ability ◽

Genetic Model ◽

Diallel Analysis ◽

Point Of View ◽

Specific Combining Ability ◽

Theoretical Point ◽

Gene Frequencies ◽

Degree Of Dominance ◽

Theoretical Standpoint ◽

Partial Diallel

This study discusses from the theoretical standpoint the analyses of heterosis and combining ability from the partial diallel. Aiming at to investigate the information provided by the genetic parameters, simulation studies were realized. The genetic model adjusted considered one gene, groups of six populations, three degrees of dominance (|d/a| equal to 0.5, 1 and 2, representing partial, complete and overdominance) and random allelic frequencies. For each degree of dominance 50 replications were performed. The model for heterosis analysis does not need to be restricted. The unrestricted model gives the same information as the restricted one. The model for combining ability is restricted. The restrictions of the partial-G2 model of GERALDI and MIRANDA-FILHO do not satisfy the parametric values of the specific combining ability effects. As in the complete diallel analysis, from the theoretical point of view there is no differences between the analysis of heterosis and combining ability. The analysis of differences in gene frequencies among the populations of the two groups is more efficient when it considers the heterosis and not the specific heterosis - or the specific heterosis effects or the effects of specific combining ability - mainly for genes whose frequencies are contrasting in the groups.

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