DIALLEL ANALYSIS OF CROSSES BETWEEN FLUE-CURED AND BURLEY TOBACCO CULTIVARS

1970 ◽  
Vol 12 (3) ◽  
pp. 484-489 ◽  
Author(s):  
Bronius Povilaitis
Keyword(s):  
Combining Ability ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
General Combining Ability ◽  
The Other ◽  
Additive Effects ◽  
Burley Tobacco ◽  
Total Variability ◽  
Number Of Leaves ◽  
Cross Experiment

The eight tobacco cultivars Delcrest, Hicks Broadleaf, Yellow Gold and Jamaica Wrapper of the flue-cured type and Burley 1, Burley 21, Virginia B29 and Kentucky 12 of the burley type and their crosses and reciprocals were grown in an 8 × 8 diallel-cross experiment. Diallel analyses were completed according to procedures described by Hayman, Griffing and Robinson.The mean squares for general combining ability and for Hayman's a made up a considerably higher proportion of the total variability than the other subdivisions. The variances for special combining ability were in all instances smaller than those for general combining ability, although there were differences in size and in levels of significance between Griffing's and Robinson's methods. The statistic due to additive effects of genes (Hayman's D) was significant for days to flower, height, and number of leaves, and the statistic due to dominance effects significant for days to flower and height. The greatest effect in decreasing the number of days to flower was exhibited by the cultivar Delcrest, and the greatest effect in increasing the number of days to flower was by Yellow Gold and Kentucky 12. Kentucky 12 showed the greatest effect in increasing height and number of leaves.

scholarly journals Diallel analysis of the duration of vegetation period in tomato (Solanum lycopersicum L.) with increased lycopene content in the fruit

2021 ◽  
Vol 117 (2) ◽  
pp. 1
Author(s):  
Liudmila Andreevna RUDAS ◽  
Mariya Viktorivna TORBANYUK ◽  
Zinovy Deonizovich SYCH
Keyword(s):  
Solanum Lycopersicum ◽  
Combining Ability ◽  
Diallel Analysis ◽  
Genetic System ◽  
Vegetation Period ◽  
General Combining Ability ◽  
Additive Effects ◽  
Solanum Lycopersicum L ◽  
Lycopene Content ◽  
Dark Green

<p> Five parental forms of tomato (Solanum lycopersicum L.) and twenty hybrids F1, were studied which were obtained by the complete diallel scheme (5 x 5). For genetic analysis (by Hayman, 1954; Jinks,1954) was used line №477 (sp,u), variety Alya (sp) with reduced  duration of vegetation period and three collection samples with the high lycopene content in fruits: Dark Green (hp-2dg), МО 112 (hp), Т˗3627 (Bc). The effects of the general (GCA) and specific combining ability (SCA) of the duration of vegetation period were determined and established character of inheritance. According to the results of research, the duration of vegetation period is controlled by additive-dominant genetic system. Inheritance occurs by type of over dominance, and in dry and hot summers which led to the prolongation of the duration of vegetation period, there is a tendency to incomplete dominance, but it is apocryphal. In genetic control a major role play non-additive effects of genes. The best reliable effects of the general combining ability (GCA) had line №477 and variety Alya. They can be recommended for the creation of heterotic hybrids and varieties.</p>

scholarly journals Potential of parents and hybrids experimental of the yellow melon

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.

GENETIC ANALYSIS OF QUANTITATIVE CHARACTERS IN CIGAR AND PIPE TOBACCO NICOTIANA TABACUM. I. MORPHOLOGICAL CHARACTERS

1980 ◽  
Vol 22 (2) ◽  
pp. 173-182 ◽  
Author(s):  
I. S. Ogilvie ◽  
V. Kozumplik
Keyword(s):  
Combining Ability ◽  
Diallel Cross ◽  
Morphological Characters ◽  
General Combining Ability ◽  
Leaf Length ◽  
Specific Combining Ability ◽  
Leaf Angle ◽  
Combining Abilities ◽  
Number Of Leaves ◽  
Pipe Tobacco

A diallel cross of four cigar and one pipe tobacco was analysed for the following characters: (1) height before topping (2) height after topping (3) number of leaves (4) leaf width (5) leaf length (6) leaf angle and (7) days from transplanting to flower. The experiment was performed over three years with four replications. Analysis was done for general combining ability and specific combining ability. General combining ability was in all cases greater than specific combining ability, although there were some specific combining ability effects. The line Pennbel 69 showed very high positive general combining abilities for all characters while the line Petit Havane showed negative general combining abilities for these characters. Commercial production of F1 hybrids would not seem to be of any advantage for any of these characters with these parental lines.

scholarly journals Combining Ability and Gene Action Estimates of Eight Parent Diallel Crosses of Chickpea for Ascochyta Blight

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Mohamed Labdi ◽  
Samia Ghomari ◽  
Samia Hamdi
Keyword(s):  
Combining Ability ◽  
Ascochyta Blight ◽  
Control Plant ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Additive Effects ◽  
Two Generations ◽  
Two Stages ◽  
Half Diallel ◽  
Dominant Genes

Ascochyta blight resistance was studied in half-diallel cross involving eight genotypes of chickpea at seedling and adult stages. The disease was rated in the greenhouse with a modified scale from 0 to 100%. The diallel analysis was performed on 28 F1 and their F2. The results were analyzed with the Hayman and Griffing methods. The general combining ability is most important for two generations, is highly significant for the two stages, and is more important than specific combining ability. This result reflects a strong preponderance of additive effects and epistasis additive × additive with respect to dominance effects in this material for the two generations, which shows the predominance of additive versus dominance. Estimates of heritability are very high. The additive effects have the highest value indicating the importance of this component for resistance toAscochyta. For seedling stage, the negative sign of F for both generations indicates that there are much more recessive alleles that affect resistance to the disease. In adult stage, F is positive in both generations and shows more dominant alleles that control plant reaction to pathogen. H2is positive in both generations which show that dominant genes are acting mostly towards the susceptibility.

Genetic analysis of plant height and diameter at ground level of silver birch (Betula platyphylla) seedlings

2008 ◽  
Vol 5 (2) ◽  
pp. 147-151
Author(s):  
Gao Fu-Ling ◽  
Li Shao-Chen ◽  
Jiang Ting-Bo
Keyword(s):  
Genetic Analysis ◽  
Plant Height ◽  
Combining Ability ◽  
Ground Level ◽  
General Combining Ability ◽  
Silver Birch ◽  
The Other ◽  
Betula Platyphylla ◽  
Additive Effects ◽  
Diallel Design

AbstractSix silver birch (Betula platyphylla) parents of diverse provenances were crossed according to Griffing 4 diallel design, and the plant height and diameter at ground level (DGL) of their F1 progeny were observed. The analysis of general combining ability (GCA) and specific combining ability (SCA) showed that two phenotypes were simultaneously controlled by additive and non-additive effects. The GCA between two phenotypes in a parent, and GCA of the same phenotype among different parents displayed significant differences: Q2 from Qingyuan was the best of the parents, followed by M2 from Maoer-mountain. On the other hand, the SCA of two phenotypes in a cross and the SCA of a phenotype among different crosses also varied considerably: the cross between E8 from Finland and Q1 from Qingyuan showed the highest SCA of plant height and DGL. The heritability of plant height and diameter at ground level was strong (over 60%), suggesting that these phenotypes can be used for early selection.

scholarly journals Diallel Analysis of Diplodia Ear Rot Resistance in Maize

Plant Disease ◽  
1998 ◽  
Vol 82 (6) ◽  
pp. 699-703 ◽  
Author(s):  
A. E. Dorrance ◽  
K. H. Hinkelmann ◽  
H. L. Warren
Keyword(s):  
Combining Ability ◽  
Disease Incidence ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Inbred Lines ◽  
General Combining Ability ◽  
Reciprocal Effects ◽  
Ear Rot ◽  
Stenocarpella Maydis ◽  
High Degree

A diallel cross of seven inbreds and one synthetic line of maize were analyzed in 1994 and 1995 for their reaction to Diplodia ear rot. An additional inbred line was included in the 1995 analysis. Plants were inoculated by placing a pycnidiospore suspension (5 × 103 spores per ml) of Stenocarpella maydis in the whorl at the V14 to V15 growth stage. Crosses were evaluated for disease incidence of Diplodia ear rot at harvest, and the percentage of plants with Diplodia ear rot in a plot was used for analysis. In both years, general combining ability (GCA) effects were significant. In 1995, specific combining ability effects were also significant. There were no reciprocal effects. There was no significant interaction between year and genotypes, indicating that crosses reacted the same in both years. Inbred lines B37, H111, B68, and MS had negative GCA effects that contributed toward resistance in both years. VA26, with intermediate resistance to Diplodia ear rot, contributed toward susceptibility. Only inbred lines with a high degree of resistance should be used as parents.

Heterosis and Combining Ability in Wheat under Irrigation and Moisture Stress

1974 ◽  
Vol 10 (4) ◽  
pp. 241-245 ◽  
Author(s):  
K. P. Sinolinding ◽  
A. Rehman Chowdhry
Keyword(s):  
Genetic Variation ◽  
Combining Ability ◽  
Diallel Cross ◽  
Moisture Stress ◽  
General Combining Ability ◽  
Kernel Weight ◽  
Reciprocal Effects ◽  
Additive Effects ◽  
Effective Selection

SUMMARYAnalysis of a 4-parent diallel cross showed marked heterosis for yield and its components in two crosses (Mexipak × Dirk and C273 × AU49) under irrigation, while little or negative heterosis occurred under moisture stress. A large part of the genetic variation among crosses for yield, and most components of yield, was attributed to the general combining ability, indicating that the additive effects were important. Reciprocal effects and various interactions were insignificant except for kernel weight, which suggests that effective selection could be made under irrigation of genotypes adaptable to moisture stress.

Heterosis and combining ability in a diallel cross of chilli (Capsicum annum L.)

1976 ◽  
Vol 87 (2) ◽  
pp. 447-449 ◽  
Author(s):  
A. C. Soh ◽  
T. C. Yap ◽  
K. M. Graham
Keyword(s):  
Mosaic Virus ◽  
Combining Ability ◽  
Virus Disease ◽  
Diallel Cross ◽  
Additive Effects ◽  
Capsicum Annum ◽  
Combining Ability Analysis ◽  
Character Variation ◽  
The Mean ◽  
Cross Experiment

SummaryIn a 7×7 diallel-cross experiment utilizing parents with varying resistance to mosaic virus disease and of different horticultural types significant heterosis over the better parent was found in number of days between sowing and flowering and over the mean of the two parents in other characters. The combining ability analysis revealed that genetic control of most character variation was due to additive effects.It is suggested that pedigree and/or backcross methods are most appropriate for improving this chilli population.

scholarly journals Diallel Analysis for Rain Check in Tomato

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 772F-772
Author(s):  
Cheryld L. Emmons ◽  
J.W. Scott
Keyword(s):  
Environmental Stress ◽  
Combining Ability ◽  
Block Design ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Additive Effects ◽  
Mature Fruit ◽  
Narrow Sense Heritability ◽  
Randomized Complete Block Design ◽  
Reciprocal Differences

To investigate the genetic control of rain check (cuticle cracking) in tomato (Lycopersicon esculentum), a full diallel cross including five parents ranging from very resistant to very susceptible was grown in late spring 1994. A randomized complete-block design with four replications was used and the proportion of fruit showing check was measured on all mature fruit from eight plants per replication at three harvests. Analysis of variance indicated significant (P < 0.0001) variation for line, harvest, and line by harvest interaction. The proportion of fruit affected increased with each successive harvest. Reciprocal differences were tested on a by-harvest basis and found to be nonsignificant. Reciprocals were combined and a Hayman's analysis was performed on a by-harvest basis on the means. Additive effects on variance were significant (P < 0.05) for all harvests. Under high environmental stress (harvest 3), dominance effects were negative and significant (P < 0.05). Narrow-sense heritability ranged from 0.54 to 0.67 and increased with increasing environmental stress. General combining ability was significant for all harvests, whereas specific combining ability was significant only for harvest 3 (P < 0.05).

HETEROSIS, COMBINING ABILITY, AND PREDICTED SYNTHETICS FROM A DIALLEL CROSS IN SUNFLOWERS (HELIANTHUS ANNUUS L.)

1966 ◽  
Vol 46 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Eric D. Putt
Keyword(s):  
Helianthus Annuus ◽  
Combining Ability ◽  
Oil Content ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Helianthus Annuus L ◽  
The Mean ◽  
Seed Characters ◽  
Mature Weight

Heterosis occurred for the eight plant and seed characters studied. It was most frequent for yield of seed and height of plant. Mean squares for general combining ability (gca) and specific combining ability (sca) were significant (P =.01) for all characters. The estimated components for gca were greater than for sca for days to mature, weight per bushel, and percent oil in the seed; less for height and yield of seed; and essentially the same for days to bloom, diameter of head, and weight per 1000 seeds.The yield of seed and percent oil in the seed, for the highest ranking 100 synthetics that could be composed from the 10 lines, was predicted in F6 assuming 50 and 60% outcrossing between F2 and F6. Virtually all values exceeded the mean performance of four check samples of commercial hybrids. Many exceeded the highest rank check for oil content in the seed. Fourteen of the highest ranking 100 synthetics for yield and 30 for oil content consisted of two or three lines. It was concluded that synthetics can be superior to the present hybrids in heterosis and that desirable synthetics can be made from only a few lines.

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