Genetic Component and Vr-Wr Graphical Analysis in Blackgram [Vigna mungo (L.) Hepper]

2021 ◽  
Author(s):  
Neha Sharma ◽  
R.K. Mittal ◽  
V.K. Sood
Keyword(s):  
Major Gene ◽  
Diallel Analysis ◽  
Epistatic Effect ◽  
Graphical Analysis ◽  
Gene Group ◽  
Genetic Components ◽  
Additive Gene ◽  
Selection Methodology ◽  
Half Diallel

Background: To develop a new high yielding variety, it is important to generate utilitarian recombinants and devise an appropriate strategy for selection and advancement of those recombinants. Method: Keeping this in mind, genetic components of yield and its related traits were determined in nine genotypes of blackgram through half diallel analysis using Hayman’s numerical and graphical approach. Conclusion: The estimates of genetic components deduced the role of non-additive gene action in the inheritance of all traits. The Vr-Wr graphical analysis revealed that assumptions laid by Hayman for diallel analysis were seldom fulfilled. Epistatic effect was predominant in all traits except days to 75 per cent maturity. Unidirectional dominance was observed in days to 75 per cent maturity, pods per plants and seed yield per plant and crude protein content. One major gene group was found controlling all traits except days to 75 per cent maturity and branches per plant. These findings can be used by breeders to devise appropriate selection methodology for yield improvement in blackgram.

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

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.

Genetic components analysis in Indian mustard (Brassica juncea L. Czern. and Coss.)

2019 ◽  
Vol 4 (02) ◽  
pp. 175-181
Author(s):  
Amit Tomar ◽  
Ram Avtar ◽  
Mahak Singh
Keyword(s):  
Gene Action ◽  
Indian Mustard ◽  
Additive Gene Action ◽  
Genetic Components ◽  
Degree Of Dominance ◽  
Additive Component ◽  
Additive Gene ◽  
Components Analysis ◽  
Almost All

Genetic components analysis exhibited that both additive and dominance components were highly significant for almost all the traits indicating the role of both additive as well as non-additive gene action in controlling the expression of concerned traits. In general dominance component values were higher than that of additive component for all the traits. The estimates of average degree of dominance indicated presence of over-dominance for all the traits.

scholarly journals DIALLEL ANALYSIS OF ROUGH BLOSSOM-END SCARRING IN TOMATO

HortScience ◽  
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.

scholarly journals Combining Ability and Gene Action in Cucumber (Cucumis Sativus L.)

2018 ◽  
Vol 5 (4) ◽  
pp. 145
Author(s):  
S. Ahammed ◽  
M. M. Hossain ◽  
M. Zakaria ◽  
B. Ahmed ◽  
M. A. K. Mian
Keyword(s):  
Combining Ability ◽  
Genetic Variance ◽  
Gene Action ◽  
Additive Genetic Variance ◽  
Cucumis Sativus L ◽  
Effective Utilization ◽  
Qualitative And Quantitative ◽  
Genetic Components ◽  
Additive Gene

Combining ability and genetic components of eleven inbred line of cucumber were estimated following line x tester mating design for qualitative and quantitative characters. Three inbred lines were used as tester. Variance within the treatments, parents, parent vs crosses, crosses, testers and line x tester interaction were highly significant for all the characters. Considering the gca effects the lines CS08, CS16, CS040, CS07 and CS51 were best for their earliness and other horticulture traits. The hybrids CS07×CS08, CS16×CS44, CS51×CS44, CS40×CS08, CS17×CS39 were superior in terms of yield per plant and its component characters. The magnitude of σ2SCA was high in all characters compared to σ2GCA and dominance variance (σ2D) was higher than the additive genetic variance (σ2A) indicating that the predominance role of non-additive gene action. The results indicated the importance of heterosis breeding for effective utilization of non-additive genetic variance in cucumber.

DIALLEL ANALYSIS OF THE INHERITANCE OF RESISTANCE TO RACE 6 OF PLASMODIOPHORA BRASSICAE IN CABBAGE

1976 ◽  
Vol 56 (4) ◽  
pp. 865-868 ◽  
Author(s):  
M. S. CHIANG ◽  
R. CRÊTE
Keyword(s):  
Plasmodiophora Brassicae ◽  
Major Gene ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Inheritance Of Resistance ◽  
Narrow Sense Heritability ◽  
Gene Group ◽  
Recessive Genes ◽  
High Dominance ◽  
Additive Genetic Effects

A randomized complete block experiment of a 4 × 4 diallel cross was conducted in the greenhouse to study the inheritance of resistance to race 6 of Plasmodiophora brassicae Wor. in cabbage (Brassica oleracea var. capitata L.). Results show that additive genetic effects are high; dominance effects are also present but much lower as compared to the additive effects. It appears that there is only one major gene group showing dominance. Cultivar Badger Shipper carries the most recessive genes among the four parents studied. The narrow sense heritability is estimated at 83%.

scholarly journals DETERMINATION HETEROSIS,COMBINING ABILITY AND GENE ACTION USING HALF DIALLEL CROSSES IN MAIZE.

2018 ◽  
Vol 49 (6) ◽  
Author(s):  
Hammadi & abed
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Diallel Analysis ◽  
Kernel Weight ◽  
Specific Combining Ability ◽  
Analysis Method ◽  
Degree Of Dominance ◽  
Additive Gene ◽  
Hybrid Art ◽  
Half Diallel

Six inbred lines of maize were crossed in this study by using half – diallel analysis method , during spring season of 2017, to produce fifteen F1 crosses. The parents and crosses were cultivated during fall season of 2017 by using R.C.B.D with three replications to determine heterosis, general and specific combining ability effects and gene action . Significant differences were found among parental and their crosses for all the traits . The results were showed that the hybrid ( Zm - 1× Zm - 5) had the highest heterosis in grain yield.plant-1 (113.4%). The hybrid (ART-B-17x SYN-33) produced highest number rows. ear-1 (17.9) rows, 500 kernel weight (112.9) gm and grain yield.plant-1 (214.7) gm . The values  of  specific combining ability variances were more than the general combining ability variances for all the traits, indicating that non-additive gene action was responsible for inheritance of all the traits. The values of the broad sense heritability for all characters were higher and  average degree of dominance was exceeded one for all the traits . Results indicated that some inbreds could be used in breeding  program to develop single crosses which have  higher grain yield because all the traits  under over dominance gene action

GENES FOR DWARFNESS IN WHEAT, TRITICUM AESTIVUM L

Genetics ◽  
1973 ◽  
Vol 75 (3) ◽  
pp. 531-539
Author(s):  
G N Fick ◽  
C O Qualset
Keyword(s):  
Plant Height ◽  
Major Gene ◽  
Single Gene ◽  
Primary Source ◽  
Triticum Aestivum L ◽  
Gene Effects ◽  
Dwarfing Gene ◽  
Genetic Components ◽  
Reduced Height ◽  
Additive Gene

ABSTRACT The genetic control of plant height was studied in crosses of four spring wheats involving the standard height variety Ramona 50 and short-statured selections Olesen, D6301, and D6899. Data from parent, F1, F2, and F3 populations indicated that four independently segregating loci account for most of the differences among the four varieties. Two major genes of a highly recessive nature condition reduced height in Olesen and the Norin 10 derivative D6301. Olesen also carries a third dwarfing gene which is partially dominant in its effects over genes for tallness. This gene, or a gene that acts in a similar manner, is also present in the standard height variety Ramona 50. Dwarfing in D6899, a derivative of Tom Thumb, is controlled primarily by a single gene with mainly additive effects which is not present in any of the other three varieties. Genetic components estimated from generation means (parental, F1, F2, F3, and backcross) indicated that additive gene effects were the major component of variation in four of the six crosses, and of similar magnitude to dominance effects in another cross. The primary source of genetic variation in the cross Olesen × D6899 was due to epistasis with both additive × additive and dominance × dominance effects of major importance. The results of the generation mean analyses were consistent with the models for major-gene control of plant height based on segregation patterns.

scholarly journals COMBINING ABILITY ANALYSIS FOR FRUIT YIELD AND ITS COMPONENT TRAITS IN BHENDI (ABELMOSCHUS ESCULENTUS (L.) MOENCH)

2021 ◽  
Vol 21 (No 1) ◽  
Author(s):  
C. Praveen Sampath Kumar ◽  
T. Tamil Mathi ◽  
J.L. Josh ◽  
Darling B. Suji ◽  
Ajish Muraleedharan
Keyword(s):  
Plant Breeding ◽  
Combining Ability ◽  
Diallel Analysis ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Flowering Plant ◽  
Fruit Length ◽  
Component Traits ◽  
Additive Gene ◽  
Half Diallel

The present investigation was undertaken to evaluate six parents and fifteen hybrids through half-diallel mating system to study general and specific combining ability effects and genetic analysis for various yield and yield attributing characters. Six parents viz., Arka Anamika (P1), Thanvi 66 (P2), Villupuram Local (P3), Dhaanya (P4), Ankur 41 (P5) and Varsha Uphar (P6) were crossed in half-diallel fashion at the Plant Breeding Farm, Department of Genetics and Plant Breeding, Faculty of Agriculture, Annamalai University. Resulting fifteen hybrids along with their parents were evaluated for their combining ability. Observations were recorded on single plant basis. The observations were made on characters namely, days to first flowering, plant height at maturity, number of primary branches per plant, number of nodes per plant, number of fruits per plant, number of seeds per fruit, fruit length, fruit girth, single fruit weight and fruit yield per plant. In half-diallel analysis, the variance of the genotype for all the characters were highly significant indicating high genetic variability among the parents studied. The variance due to GCA was higher than the corresponding variance due to SCA for most of the characters except number of fruits per plant, fruit length and fruit girth. The combining ability variance revealed the preponderance of additive gene action for all the characters studied. The parents P1 and P6 were found as good general combiner. Based on the sca effects, the hybrid P1 x P6 considered as the best followed by crosses P2 x P4 and P3 x P4 considered as the better hybrids.

scholarly journals Combining Ability And Heterosis For Some Quantitative Traits In Experimental Maize Hybrids

2014 ◽  
Vol 70 (1) ◽  
pp. 41-54
Author(s):  
Mohammad Abul Kalam Azad ◽  
Bhabendra Kumar Biswas ◽  
Nazmul Alam ◽  
Sheikh Shamimul Alam
Keyword(s):  
Combining Ability ◽  
Quantitative Traits ◽  
Maize Yield ◽  
Inbred Lines ◽  
Specific Combining Ability ◽  
Commercial Cultivation ◽  
Diallel Mating Design ◽  
Additive Gene ◽  
Half Diallel

Abstract In rabi season 2012, six diversed maize inbred lines were crossed in all possible combinations without reciprocals by using a half diallel mating design to obtain 15 single cross. Inbred parents and their F1 single crosses with a check were evaluated in rabi season 2013 to evaluate the role of general and specific combining ability and heterosis for some quantitative traits. Significant general combining ability variances was observed only for cob height and specific combining ability variances were observed for plant height, cob height, cob length, cob girth, number of kernels per cob, cob weight and hundred grain weight. The GCA/SCA ratio was less than unity for all studied traits except shelling percentage; this means that these traits are pre-dominantly controlled by non-additive gene action. Based on GCA estimates, it could be concluded that the best combiners were ML01, ML05 and ML29 inbred lines for most of the studied traits. This result indicated that these inbred lines could be considered as good combiners for improving these traits. Significant positive SCA effects were found for all studied traits except number of kernels per row and shelling percentage. Based on SCA effects, it could be concluded that the crosses ML01×ML02, ML02×ML05, ML02×ML29 and ML05×ML15 could be exploited by the maize breeders to increase maize yield. Three F1 hybrids such as ML02×ML15, ML02×ML29 and ML05×ML15 proved to be the outstanding hybrids to immediate further steps for commercial cultivation. In a conclusive decision the F1 hybrid, ML02×ML29 was the best combination as evaluated through combining ability and standard heterosis.

Estimation of genetic variance on qualitative and quantitative improvement through biometrical approach half diallel analysis in (Triticum aestivum L)

2017 ◽  
Vol 2 (02) ◽  
pp. 146-151
Author(s):  
Bijendra Kumar ◽  
D. N. Bharadwaj ◽  
Lokendra Singh ◽  
Sarvendra Kumar Gupta
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Diallel Analysis ◽  
Triticum Aestivum L ◽  
Flowering Plant ◽  
Genetic Studies ◽  
Genetic Components ◽  
Filial Generation ◽  
Selection Parameters ◽  
Half Diallel

The present investigation entitled “Genetic studies for yield and its contributing character in bread wheat (Triticum aestivum L.)” was undertaken involving 100 genotypes (10 parents +45 F1s +45F2s) of a 10- parent-diallel to study the genetic parameters for some quality and quantity attributes along with its contributing traits. The diverse wheat cultivars/ genotypes and their first as well as second filial generation was studied by resolving them in genetic component analysis and selection parameters (direct and indirect parameters). The observations were recorded on 13 characters namely, days to 75% flowering, plant height, number of reproductive tiller per plant, number of spikelets per spike, spike length, number of grain per spike, days to maturity, 1000-seed weight, ear density, duration of reproductive phase, seed hardness, protein content and yield per plant. The data recorded were subjected to different analysis. Forty five crosses in F1 generation of wheat (Triticum aestivum L.) were used for studying the character association among grain yield and its related characters. The results showed that the number of grains per spike, grain weight per spike and number of productive tillers per plant were significantly and positively associated with grain yield per plant in parents and F1 cross combinations. Dickson and Jinks (1956) extended the above methods of diallel analysis, which estimated both the degree of parental heterozygosity and comparable genetic components of variation.

Sign in / Sign up

Export Citation Format

Share Document