scholarly journals Implications of hybrid vigour, combining ability and per se performance in pigeonpea [Cajanus cajan (L.) Millsp.]

2016 ◽  
Vol 8 (2) ◽  
pp. 597-603
Author(s):  
Yamanura Yamanura ◽  
S. Muniswamy ◽  
Ramesh Ramesh
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Cajanus Cajan ◽  
Hybrid Vigour ◽  
Gene Effects ◽  
Yield Attributes ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Check Variety ◽  
Per Se

Three CGMS lines were crossed with 17 testers in a line × tester design during Kharif 2013 and sufficient number of hand pollinated seeds was produced. The resultant 51 hybrids along with their 20 parents and standard check variety (Maruti) were evaluated in RBD design with two replications. Combining ability analysis evinced predominance of non-additive gene effects for 7 characters indicating relevance of heterosis breeding for improving yield attributes. The gca effects of parents revealed that ICPA-2043, GRG-2009, GRG-2009-2, LAXMI, LRG-41 and JKM-197 were good general combiners for seed yield and it’s direct components. The estimates of sca effects revealed that 11 experimental hybrids had significant, desirable and positive sca effects for seed yield/plant. Among these, three best crosses were selected on the basis of per se performance for ascertaining their association with sca effects of seed yield per plant and its attributes. The investigation identified the good general combiners (ICPA -2043, GRG-2009, GRG-2009-2, LAXMI, LRG-41 and JKM-197) and promising crosses (ICPA-2043 X GRG-2009-2, ICPA-2047 X GRG-2OO9 and ICPA-2043 X ICPL-288) showing high mean and significant positive sca effects involved high × high gca effects of parents. These parental combinations may be used in breeding program for exploitation of hybrid vigour.

scholarly journals Combining ability analysis for seed protein and methionine content in green gram [Vigna radiata (L.) wilczek]

2018 ◽  
Author(s):  
Anamika Nath ◽  
S. R. Maloo ◽  
Srikanta Nath ◽  
G. Y. Yadav
Keyword(s):  
Protein Content ◽  
Seed Yield ◽  
Combining Ability ◽  
Seed Protein ◽  
Green Gram ◽  
Seed Protein Content ◽  
Gene Effects ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Methionine Content

For combining ability analysis, a diallel method was employed in which eight genotypically diverse lines of green gram were crossed among themselves in all possible combinations excluding reciprocals. The analysis for combining ability revealed significant mean sum of squares of both general combining ability (GCA) and specific combining ability (SCA) for most of the characters which indicated the presence of both additive and non-additive gene actions. Higher magnitude of GCA effects than SCA effects were observed for days to secondary branches per plant, 100 seeds weight and seed yield per plant indicating predominance of these traits by additive gene effects. Higher magnitude of SCA effects than GCA effects were observed for characters pod length, seed protein content and seed methionine content pointed out to be the preponderance of non-additive gene effects in the expression of these characters. The good general combiner for seed yield was BM-4, whereas, IPM 99-125 was most promising for seed protein content and RMG-1045 for seed methionine content. The best specific cross combinations for seed yield and seed methionine content was BM-4 x PDM-139 and for seed protein content cross RMG-1035 x RMG-1045. These parents and cross combinations could be utilized for further breeding programme for improvement in yield and quality of mungbean.

scholarly journals Assessment of per se performance, combining ability, hybrid vigour and reaction to major diseases in pigeonpea [Cajanus cajan (L.) Millsp.]

2016 ◽  
Vol 8 (2) ◽  
pp. 588-596
Author(s):  
Yamanura Yamanura ◽  
R. Lokesha ◽  
V. Kantharaju ◽  
S. Muniswamy
Keyword(s):  
Analysis Of Variance ◽  
Seed Yield ◽  
Combining Ability ◽  
Performance Standard ◽  
Hybrid Vigour ◽  
Male Sterile ◽  
Additive Gene ◽  
Standard Heterosis ◽  
Per Se ◽  
Almost All

An experiment was carried out using seven cytoplasmic-genetic male sterile (CGMS) lines as females and seven diversified testers as males in a line × tester design. The analysis of variance for parents, females x males, hybrids and parents vs hybrids showed significant differences for almost all characters studied indicating the presence of sufficient variability among parents. Analysis of variance for combining ability revealed that mean squares due to females and line x tester interaction were significant for most of the characters. Thereby it is suggested that the variation in hybrids in respect of seed yield may be strongly influenced by the female lines. Analysis of variance revealed that the ratio of variance due to GCA to SCA was less than unity for all the characters indicating that these traits may be under the influence of non additive gene action and these characters are more likely to be improved through heterosis breeding. The gca effects of parents revealed that ICPA-2043, ICPA-2047, ICPA-2078, AKT-9913, BDN-2 and GRG-811 were good general combiners for seed yield and it’s direct compo-nents. The top three crosses exhibiting high specific combing ability effects along with their Per se performance, standard heterosis and gca status of the parents indicated that the cross combinations ICPA-2092 x GRG-811, ICPA-2043 x ICP-7035 and ICPA-2047 x RVKP-261 were good specific combiners for seed yield. These parental combinations are being used for exploitation of hybrid vigour. The good general combiners (ICPA-2043, ICPA-2047, ICPA-2078, AKT-9913, BDN-2 and GRG-811) and promising crosses viz. ICPA-2047 x GRG-811 and ICPA-2047 x BDN-2 were resistant for SMD and Fusarium wilt diseases, having high mean performance, positive sca effects for seed yield were identified from the present investigation and these may be useful in future breeding program.

Combining ability analysis in mungbean [Vigna radiata(L.) Wilczek]

2017 ◽  
Author(s):  
Anamika Nath ◽  
S. R. Maloo ◽  
Baudh Bharti ◽  
R. B. Dubey ◽  
Rajani Verma
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Mean Square ◽  
Additive Gene Action ◽  
Gene Effects ◽  
Combining Ability Analysis ◽  
Additive Gene

A diallel method was employed in which eight genotypically diverse lines of mungbean were crossed among themselves in all possible combinations excluding reciprocals. The mean square due to general combining ability (GCA) and specific combining ability (SCA) were significant for all the characters except mean square due to (SCA) for clusters per plant and seed yield per plant indicating importance of both additive as well as non-additive gene action. The estimates of variances due to specific combining ability were higher than general combining ability for all the traits except days to 50 % flowering, primary branches per plant, clusters per plant and seed yield per plant pointed out to be the preponderance of non-additive gene effects in the expression of these characters. Whereas predictability ratios were greater than the value of 0.5 for days to 50 % flowering, primary branches per plant, clusters per plant and seed yield per plant indicating the predominance of additive gene action for these characters. However, predictability ratio exhibited less than 0.5 values for rest of the characters indicating the predominance of non- additive gene action. The good general combiners for seed yield per plant were BM-4, PDM-139, ML-131, and IPM 99-125. The best specific cross combinations wereRMG-344 x RMG-1045, RMG-1035 x RMG-1045 and BM-4 x PDM-139. showed the highest positive significant SCA effect for seed yield per plant. These cross combinations could be utilized for further use in breeding programme for improvement in yield of mungbean.

Analysis of gene effects governing yield and yield traits in pigeonpea (Cajanus cajan L.)

2016 ◽  
Vol 50 (3) ◽  
Author(s):  
R. S. Singh ◽  
M. N. Singh
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Cajanus Cajan ◽  
Dominant Gene ◽  
Gene Effects ◽  
Relative Contribution ◽  
Main Gene ◽  
Additive Gene ◽  
Almost All ◽  
Pod Length

The six generations (P<sub>1</sub>, P<sub>2</sub>, F<sub>1</sub>, F<sub>2</sub>, BC<sub>1</sub> and BC<sub>2</sub>) of twelve cross combinations of pigeonpea (<italic>Cajanus cajan</italic> L.) were studied during 2003-2006 for days to 50 % flowering, days to maturity, plant height, number of primary branches, number of secondary branches, pods per plant, pod length, number of seeds per pod, 100-seed weight, harvest index and seed yield per plant. The means of six generations were subjected to detect main gene effects and interactions. The estimates of six parameter model revealed that both additive and dominant gene effects were important in all the crosses for almost all the traits. However, the relative contribution of dominant gene effects was much higher than additive gene effects for plant height, pods per plant and seed yield per plant. Higher frequency of duplicate type of epistasis also confirms the prevalence of dominance gene effects for above traits except for seed yield per plant.

scholarly journals Combining Ability Analysis of Maize Inbred Lines in Ethiopia

2020 ◽  
Vol 7 (2) ◽  
pp. 113-124
Author(s):  
Abenezer Abebe Tefera ◽  
Legesse Wolde Beyene ◽  
Wosene Gebreselassie Abtew
Keyword(s):  
Analysis Of Variance ◽  
Combining Ability ◽  
Genetic Material ◽  
Inbred Lines ◽  
Gene Effects ◽  
Lattice Design ◽  
Maize Inbred Lines ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Proportional Contribution

The study was initiated to estimate combining ability of maize inbred lines and crosses using line by tester analysis. Fifty entries consists 48 F1 single crosses developed from 24 inbred lines and 2 testers using line x tester design and two commercial check hybrids used in the study. The experiment was conducted using alpha lattice design with two replications. Analysis of variance revealed existence of significant genetic variation among genotypes for all studied traits except for plant aspect (PA). Location x entry interaction for most of the traits was not significant which suggests hybrid performance was consistent across tested locations. Line x tester analysis of variance showed that mean squares due to GCA of lines were significant (p< 0.01 or p< 0.05) for all studied traits. Mean squares of tester GCA and SCA were significant for most of studied traits. This indicates that both additive and non-additive gene effects had contributed for the variation of the crosses. However, higher proportional contribution of additive gene action for all studied traits was obtained. Several lines and crosses were identified as good general and specific combiners for yield and yield related traits. Lines L23, L11, L15 and crosses L2xT1, L3xT1, L8xT1, L11xT1, L23xT1 and L13xT2 were found to be good general and specific combiners, respectively. In conclusion, the stated inbred lines with desirable gca effects and cross combinations with desirable sca effects for grain yield and yield related traits could be used as useful genetic material.

scholarly journals Combining Ability Analysis of Heat Tolerance in Gossypium hirsutum L.

2011 ◽  
Vol 41 (No. 1) ◽  
pp. 23-28 ◽  
Author(s):  
T. Azhar M ◽  
A. Khan A ◽  
A. Khan I
Keyword(s):  
Gossypium Hirsutum ◽  
Heat Tolerance ◽  
Combining Ability ◽  
Specific Combining Ability ◽  
Gossypium Hirsutum L ◽  
Gene Effects ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Significant Comparison ◽  
Efficient Transfer

In order to study the genetic control of heat tolerance, four varieties/lines of Gossypium hirsutum L., namely MNH-554, Cocker-304, Delcerro and Albacala (71) 1190, were crossed in all possible combinations. Heat tolerance of 12 hybrids and their parents was measured at reproductive phase using an electrolyte leakage technique. The genetic analysis of the data showed significant effects of specific combining ability and reciprocals, but the effect of general combining ability appeared to be non-significant. Comparison of the parents for heat tolerance revealed that Delcerro and MNH-554 were the best general combiners for the character. The crosses Cocker-304 &times; Delcerro and Albacala (71) 1190 &times; MNH-554 were determined as the best combinations for heat tolerance and they involved one good general combiner as a parent. Significant effects due to specific combining ability indicated the importance of non-additive gene effects controlling heat tolerance. This information suggests that development of heat tolerance in the present plant material may be difficult; therefore it is necessary to design a specific breeding programme for efficient transfer of the trait. &nbsp;

Heterosis and combining ability analysis for yield and yield contributing traits in velvet bean Mucuna pruriens (L.) DC

2017 ◽  
Author(s):  
A. Chinapolaiah ◽  
K. Hima Bindu ◽  
G. N. Manjesh ◽  
N. Hariprasad Rao ◽  
S. Sudheer Kumar ◽  
...  
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Breeding Programme ◽  
Velvet Bean ◽  
Additive Gene Action ◽  
Pod Yield ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Pod Length

A field experiment was conducted to know the gene action and selection of superior parents of velvet bean for hybridization. The heterosis and combining ability study was carried out using 6x6 half diallel mating design excluding reciprocals. Combining ability analysis revealed that magnitude of sca variance was greater than gca variance suggesting the predominance of non additive gene action for most of the traits except days to 50 per cent flowering, number of flowers per inflorescence, number of pods per bunch and 100 seed weight where gca variance was greater than sca variance indicating predominance of additive gene action. Based on gca effects, parents Arka Dhanwantari, IIHR Selection 8 and IIHR Selection 2 were best general combiners for the traits such as number of flowers per inflorescence, pod length, pod weight, number of bunches per plant, number of pods per bunch, dry pod yield and seed yield per plant which can be used in future breeding programme. Specific combining ability studies indicated cross IIHR Selection 2 x IIHR Selection 8 as best specific combiner for the economically important traits viz., pod length, pod weight, dry pod yield per plant and seed yield per plant. The cross IIHR Selection 8 x IIHR Selection 3 was recorded high heterotic effects for dry pod yield per plant, seed yield per plant and test weight of the seed. The cross IIHR Selection 2 x IIHR Selection 8 as superior hybrid as recorded high heterobeltiosis for days to 50% flowering, pod length, pod weight, dry pod yield per plant and seed yield per plant and days to maturity which can be exploited in future breeding programme.

scholarly journals Study on combining ability and heterosis for earliness and short statured plant in maize

2016 ◽  
Vol 41 (2) ◽  
pp. 365-376 ◽  
Author(s):  
M Hoque ◽  
F Akhter ◽  
M Kadir ◽  
HA Begum ◽  
S Ahmed
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Growth Parameters ◽  
Thousand Grain Weight ◽  
Gene Effects ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Ear Height ◽  
Low X ◽  
Average Average

An experiment was carried out in 6x6 diallel crosses for combining ability analysis for grain yield, maturity and growth parameters in maize. Analysis of variance for combining ability showed that mean square value due to GCA & SCA were highly significant for all characters except SCA in days to tasseling and days to maturity indicated that all but two traits were governed by both additive and non-additive gene action. Variances due to GCA were much higher in magnitude than SCA indicated additive gene effects were much more important for all characters except cob length, thousand grain weight and ear height. The Parent P5 was the best general combiner for yield and most of the yield contributing characters. The Parent P1 & P2 were best general combiner for both dwarf and earliness. The crosses showing significant SCA effects for yield involving average x average, average x low and low x low general combining parents. The crosses P3xP6 & P4xP5 showed either significantly or numerically higher heterosis than checks BHM-5, BHM- 7 & BHM-9 for yield.Bangladesh J. Agril. Res. 41(2): 365-376, June 2016

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

2018 ◽  
Vol 43 (1) ◽  
pp. 125-134 ◽  
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

scholarly journals COMBINING ABILITY FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN KENAF (Hibiscus cannabinus L.)

2013 ◽  
Vol 24 (1) ◽  
pp. 01-06 ◽  
Author(s):  
M. G. Mostofa ◽  
L. Rahman ◽  
M. M. Hussain
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Hibiscus Cannabinus ◽  
The Other ◽  
Additive Gene Action ◽  
Yield Attributes ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Pedigree Selection ◽  
Fibre Yield

Combining ability in 6 x 6 half diallel crosses were estimated for yield and yield contributing characters in kenaf (Hibiscus cannabinus L.). Combining ability analysis revealed that mean square due to general combining ability (GCA) and specific combining ability (SCA) were significant for all the characters studied suggesting the presence of both additive and non-additive gene action for the inheritance of the concerned characters. The magnitude of GCA variance was considerably higher than that of SCA variance for days to 1st flowering, fibre weight per plant and 1000-seed weight indicating the importance of additive gene action for these traits. The other characters were preponderantly controlled by non-additive gene action. Ranking of parents on GCA performance indicated that parent P6 (Acc.2731) was the best general combiner for fibre yield and yield attributes. On the other hand, parents P2 (Acc.4197) and P3 (Acc.2922) were found to be the best for seed related traits. On SCA performance, the crosses P3 x P5, P1 x P6, P3 x P6 and P4 x P5 were found to be the best for fibre related traits, while the best specific crosses for seed related traits were P2 x P3 and P2 x P4. For the development of high fibre or seed yielding kenaf varieties, either pedigree selection method or recurrent breeding is suggested depending on the genetic behavior of the trait.DOI: http://dx.doi.org/10.3329/bjpbg.v24i1.16307

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