Diallel analysis of the combining ability of common bean (Phaseolus vulgaris L.) cultivars

Six common bean cultivars (LPSPI 93-17, LPSPI 93-19, FT-Nobre, Aporé, Rudá and Campeão-1) and their 15 diallel hybrids were evaluated for four agronomic characteristics using Griffing's methodology (1956). The analysis indicated the predominance of non-additive gene effects for days to germination and plant height. The mean number of days to flowering and mean height of the first pod insertion were predominantly controlled by genes showing additive effects. The results showed that LPSI 93-19 and Aporé were indicated for intra-population breeding, while the combinations LPSPI 93-17 x FT-Nobre, LPSPI 93-17 x Aporé, LPSPI 93-17 x Rudá, LPSPI 93-19 x Campeão-1, FT-Nobre x Aporé and Rudá x Campeão-1 were indicated for interpopulational breeding. Plants with reduced height, greater height of first pod insertion, fewer number of days to flowering and to emergence can be obtained from the segregant population of the crosses LPSPI 93-17 x FT-Nobre and LPSPI 93-19 x Rudá.

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Combining ability and heterosis study in maize (Zea mays L.) Hybrids at different environments in Bangladesh

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v43i1.36186 ◽

2018 ◽

Vol 43 (1) ◽

pp. 125-134 ◽

Cited By ~ 1

Author(s):

ANMS Karim ◽

S Ahmed ◽

AH Akhi ◽

MZA Talukder ◽

TA Mujahidi

Keyword(s):

Combining Ability ◽

Diallel Analysis ◽

Relative Magnitude ◽

High Yield ◽

Hybrid Vigour ◽

Environment Interaction ◽

Gene Effects ◽

Dwarf Plant ◽

Additive Gene ◽

The Mean

The aim of this study was to isolate superior inbred lines and better combining parents for suitable hybrids and to determine percent of heterosis using standard commercial checks in a 7 × 7 diallel analysis excluding reciprocals over five environments. The mean sum of square obtained from combined analysis of variance showed the presence of genetic variability among the crosses, environment and crosses × environment interaction for all of the characters under study. The variances for general combining ability (GCA) and specific combining ability (SCA) of variance were found significant for all the characters. However, relative magnitude of variances indicated that additive gene effects were more prominent for all the characters studied. GCA and SCA effects both showed significant interaction with environment for all the traits. This clearly suggested the need of selecting different parental lines for hybrids for different ecological situations. Parents P3, P5 and P6 were the best general combiner for high yield; parents P6 for earliness; and P1, P2 and P3 for dwarf plant type. The range of heterosis expressed by different crosses was from -13.04 to 5.25 % percent for grain yield. The better performing six crosses (P1 × P2, P1 × P5, P3 × P4, P3 × P6, P3 × P7 and P4 × P5) can be utilized for developing high yielding hybrid varieties as well as for exploiting hybrid vigour. These crosses also need to be evaluated further in multilocations.Bangladesh J. Agril. Res. 43(1): 125-134, March 2018

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Combined Dominance and Additive Gene Effects in Trait Inheritance of Drought-Stressed and Full Irrigated Popcorn

Agronomy ◽

10.3390/agronomy9120782 ◽

2019 ◽

Vol 9 (12) ◽

pp. 782 ◽

Cited By ~ 4

Author(s):

Valter Jário de Lima ◽

Antonio Teixeira do Amaral Júnior ◽

Samuel Henrique Kamphorst ◽

Rosimeire Barboza Bispo ◽

Jhean Torres Leite ◽

...

Keyword(s):

Recurrent Selection ◽

Additive Effects ◽

Reciprocal Recurrent Selection ◽

Gene Effects ◽

Complete Dominance ◽

Water Regimes ◽

Degree Of Dominance ◽

Additive Gene ◽

The Mean ◽

Dominant Genes

To define breeding strategies, the understanding of trait inheritance is critical. The objective of this study was to determine the inheritance of popcorn under different water regimes. To this end, Hayman’s diallel methodology was used, with 8 parents and 28 hybrids. The experiment was carried out under well-watered conditions (WW) and water stress (WS). For popping expansion (PE) under both water regimes, the effects of complete dominance and greater importance of the components associated with the dominance effects were observed. In contrast, the number of dominant genes was zero and the determination coefficient in the narrow sense was >50%; additive effects were also present. For the number of grains per row (GR), ear length (EL), and grain yield (GY) under WS and WW conditions, the dominance effects were the most relevant, and the mean degree of dominance with overdominance effects and greatest relevance of the components associated with this effect were also observed. The same breeding methods can be applied under the studied WS and WW conditions. Exploiting heterosis for GY and related components is a promising way to adapt popcorn to WS. To be able to capitalize on additive and dominance effects, a reciprocal recurrent selection is recommended.

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Analysis of variance of partial diallel tables

Genetics and Molecular Biology ◽

10.1590/s1415-47572000000100040 ◽

2000 ◽

Vol 23 (1) ◽

pp. 229-234 ◽

Cited By ~ 1

Author(s):

José Marcelo Soriano Viana ◽

Cosme Damião Cruz ◽

Antonio Américo Cardoso ◽

Adair José Regazzi

Keyword(s):

Genetic Variability ◽

Common Bean ◽

Statistical Tests ◽

Diallel Analysis ◽

The Other ◽

F1 Hybrids ◽

Dominance Testing ◽

The Common ◽

The Mean ◽

Partial Diallel

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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Estimating the heritability of butterfat production

The Journal of Agricultural Science ◽

10.1017/s0021859600049236 ◽

1961 ◽

Vol 57 (3) ◽

pp. 289-294 ◽

Cited By ~ 6

Author(s):

S. R. Searle

Keyword(s):

Genetic Variation ◽

New Zealand ◽

Dairy Cows ◽

Total Variance ◽

Additive Effects ◽

Narrow Sense ◽

Sampling Errors ◽

Gene Effects ◽

Additive Gene Effects ◽

Additive Gene

Part of the variation among butterfat yields in dairy cows arises from genetic differences among the animals. The proportion which this bears to the total variance is known as heritability. In the ‘narrow’ sense it is defined (Lush, 1940), as the proportion of the total variance that is due to additive gene effects; the ‘broad’ sense definition includes genetic variation arising from non-additive gene effects as well as that due to additive effects. Since related animals have a proportion of their genes in common the covariance among their production records can be used for estimating genetic variation and hence heritability. This paper discusses three groups of related animals most frequently used for this purpose, twins, daughter-dam pairs and paternal half-sibs, and presents the results of analysing production records of artificially bred heifers in New Zealand, including evidence of the magnitude of the sampling errors of the heritability estimates.

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Diallel Analysis for Area, Chlorophyll and Temperature of Flag Leaf in Bread Wheat under Well Watered and Drought Stress Conditions

Journal of Agricultural Science ◽

10.5539/jas.v13n10p45 ◽

2021 ◽

Vol 13 (10) ◽

pp. 45

Author(s):

Naheif E. Mohamed ◽

Ismail M. Bedawy ◽

Yasser A. M. Hefny

Keyword(s):

Drought Stress ◽

Bread Wheat ◽

Flag Leaf ◽

Block Design ◽

Diallel Analysis ◽

Stress Conditions ◽

F1 Hybrids ◽

Gene Effects ◽

Genetic Components ◽

Additive Gene

To study genetic analysis of some physiological traits of drought stress in wheat using diallel techniques, an experiment was performed on ten bread wheat genotypes as parents and their 45 F1 hybrids in a randomized complete block design with three replicates under well-watered and drought stress conditions at the Research Farm of Faculty of Agriculture, Sohag University, Egypt during season of 2018/19. The results showed significant differences between the genotypes (G), Parents (P), F1 crosses, P vs. F1, GCA and SCA under well-watered and drought stress in the flag leaf area (FLA), flag leaf chlorophyll content (FLCC) and flag leaf temperature (FLT), except FLCC for F1 crosses exhibited insignificant differences. The significant differences were found in the interaction of SCA × Env., in all studied traits and GCA × Env., for FLT., indicating the involvement of both additive and dominance gene action in their inheritance. The most desirable heterotic effects were considered as the largest positive heterosis estimates for FLA and FLCC, and the lowest negative for FLT. The parent numbers P9, P8 and P3 were the best general combiner for FLA under normal irrigation and drought stress. While the parents P2, P7 and P9 were the best general combiner for FLCC, under normal irrigation and (P1, P2 and P3) under drought stress. Therefor the parents P1, P4 and P5 were the best general combiner for FLT under normal irrigation, also the P3, P4 and P5 were the best general combiner for FLT under drought stress conditions. Under normal irrigation and drought stress conditions as well as the combined data, the additive genetic components of variation (VA) in F1 ’s was much greater than dominance component (VD), as expressed by the (VA/VD) ratio which was more than unity for the FLA, and FLT under normal irrigation and their combined. This indicates that the additive gene effects in F1 crosses are more important than dominance and plays the major role in the inheritance of these studied traits.

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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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Diallel Analysis of Chilli Pepper (Capsicum annuum L.) Genotypes for Morphological and Fruit Biochemical Traits

Plants ◽

10.3390/plants9010001 ◽

2019 ◽

Vol 9 (1) ◽

pp. 1

Author(s):

Aiswarya C. S. ◽

Vijeth S ◽

Sreelathakumary I ◽

Prashant Kaushik

Keyword(s):

Vitamin C ◽

Combining Ability ◽

Yield Components ◽

Diallel Analysis ◽

General Combining Ability ◽

Biochemical Traits ◽

Chilli Pepper ◽

Gene Effects ◽

Commercial Cultivation ◽

Additive Gene

Chilli pepper is commercially cultivated as a spice and is also used for the extraction of a colouring agent. Here, we performed a diallel genetic study involving five chilli pepper varieties. Parents and their hybrid were evaluated for fifteen morphological and five biochemical traits over two crop seasons under open field conditions. Variation was recorded for all of the studied traits. Similarly, significant values for general combining ability (GCA) and specific combining ability (SCA) variance were obtained for all of the traits. The ratio of σ2 SCA/σ2 GCA indicates that non-additive gene effects were predominant for all the studied traits except for fruits plant−1. Based on SCA effects, cross combinations P2 × P5, and P4 × P5 were determined excellent for flesh thickness, yield components and vitamin C. These hybrids are recommended for multilocation testing to assess their suitability for commercial cultivation. Overall, this work presents useful information regarding the genetics of important morphological and biochemical traits in chilli pepper.

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DIALLEL ANALYSIS OF ROUGH BLOSSOM-END SCARRING IN TOMATO

HortScience ◽

10.21273/hortsci.25.9.1172e ◽

1990 ◽

Vol 25 (9) ◽

pp. 1172e-1172

Author(s):

J. H. M. Barten ◽

J. W. Scott ◽

J. Elkind ◽

N. Kedar

Keyword(s):

Gene Action ◽

Dominant Gene ◽

Fruit Size ◽

Diallel Analysis ◽

Genetic System ◽

Narrow Sense Heritability ◽

Gene Effects ◽

Breeding Programs ◽

Additive Gene ◽

Half Diallel

A half diallel including 11 parents was conducted under high temp. conditions in Florida and low temp. conditions in Israel. Blossom scar (BS) size was measured relative to the fruit size for 20 mature fruits per plot. Griffing's analysis showed that both GCA and SCA effects were highly significant at both locations (p< 0.0001). Analysis according to Hayman indicated no epistatic effects. In both environments, additive and dominant gene action was significant (p < 0.0005), although the additive gene effects were most important. Averaged over all loci, the incomplete dominance was in the direction of small BS. Narrow sense heritability estimates were 0.62 and 0.57 for Florida and Israel, respectively. Combined analysis showed that the genetic system was unstable over the 2 environments, as both additive and dominant gene effects interacted significantly with environment (p < 0.0001). The implication for breeding programs is that hybrid performance should be tested at several locations to insure stability of small BS.

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152 GENETIC ANALYSIS OF CUCUMBER QUANTITATIVE TRAITS IN THE PARENTS AND THEIR F1 DIALLEL ANALYSIS

HortScience ◽

10.21273/hortsci.29.5.450e ◽

1994 ◽

Vol 29 (5) ◽

pp. 450e-450

Author(s):

Seif H. Gad El-Hak ◽

Saved. H. Mahmoud ◽

Mohamed A.. Abobakr ◽

Ragab M. Alv

Keyword(s):

Genetic Analysis ◽

Plant Height ◽

Quantitative Traits ◽

Diallel Analysis ◽

Gene Effects ◽

Diallel Crosses ◽

Additive Gene Effects ◽

Additive Gene ◽

Cucumber Yield

Five lines of cucumber and their 10 F1 diallel crosses were statistically and graphically analyzed to evaluate their performance for eight quantitative traits. Additive and non-additive gene effects were involved in the inheritance of all traits. The variances due ro GCA and SCA effects were highly significant for all traits, but the GCA effect was much greater than SCA except In the case of plant height. The cucumber “TMG-1” and “Yomaki” genotypes were superior for GCA as well as SCA for early and total yields per plant, respectively. Therefore, they can be involved in hybrid programs improvement for cucumber yield under similar conditions.

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Diallel Analysis of In Vitro Culture Traits in the Genus Lycopersicon

HortScience ◽

10.21273/hortsci.38.1.110 ◽

2003 ◽

Vol 38 (1) ◽

pp. 110-112 ◽

Cited By ~ 4

Author(s):

Guillermo Pratta ◽

Lilians N. Cánepa ◽

Roxana Zorzoli ◽

Liliana A. Picardi

Keyword(s):

Genetic Variability ◽

In Vitro Culture ◽

Opposite Effect ◽

Diallel Analysis ◽

Shoot Formation ◽

Gene Effects ◽

Callus Production ◽

Additive Gene ◽

Productivity Rate

Estimates of genetic variability for in vitro culture traits among the genus Lycopersicon and evaluation of the gene effects involved in callus production and shoot formation were achieved. Five parents including wild and cultivated tomato genotypes and their nonreciprocal 10 possible hybrid combinations were assayed. The callus percentage (C = number of cultures that only produced callus× 100/total number of cultures), the regeneration percentage (R = number of cultures that differentiated into shoots or primordia × 100/total number of cultures) and the productivity rate (PR = total number of shoots/total number of cultures) of each genotype were calculated 45 days after culture initiation. Diallel analysis revealed genetic variability for in vitro culture response. Wild genotypes contributed to a reduction in callus production and an increase in shoot formation while the cultivated genotypes either had an opposite effect or did not modify the expression of culture traits. Hybrids had the lowest callus production and highest shoot formation percentage. Additive gene effects were mainly involved in the expression of C and R, while both additive and nonadditive gene effects were involved in expression of PR.

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