scholarly journals Gene action and Combining Ability Studies Using line x Tester Analysis in Sunflower (Helianthus annuus L.)

2021 ◽  
Vol 108 (september) ◽  
Author(s):  
Ghodekar V G ◽  
◽  
Ghodke M K ◽  
Sargar P R ◽  
Dhakne V R ◽  
...  
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
High Performance ◽  
Gene Action ◽  
Flowering Plant ◽  
Additive Gene Action ◽  
Allelic Gene ◽  
Component Traits ◽  
Additive Gene ◽  
Per Se

The present investigation was aimed to study the combining ability and gene action in parents and hybrids of sunflower for seed yield and components traits. Six female lines were crossed with four male lines by Line x Tester method, to obtain 24 F1s. Data were recorded on ten characters. Among the female parents CMS-108A, CMS-250A and CMS-207A were good general combiners for seed yield and other contributing traits. Among the male parents, IB-22, EC-178178, EC-601957 were identified as the best general combiners for seed yield and other yield contributing traits. The crosses showing high desirable SCA effect have involved one of the parents of high GCA effect and in turn, had high per se performance. The SCA effect of hybrids viz., CMS-207A x IB-22 and CMS-108A x GP-6-116 were highly significant for seed yield/plant (g) and other component traits in a desirable direction, indicating that the high performance of these crosses is due to non-allelic gene action.Non-additive gene action is predominant for all the studied characters except days to 50% flowering, plant height (cm) and hull content (%).

scholarly journals Combining ability and gene action for seed yield and its component traits in green gram (Vigna radiata L.)

2021 ◽  
pp. 116-122
Author(s):  
PUSHPENDRA SINGH
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Green Gram ◽  
Additive Gene Action ◽  
Degree Of Dominance ◽  
Component Traits ◽  
Sources Of Variation ◽  
Additive Gene

An investigation to study of combining ability and gene action was conducted on green gram for seed yield per plant and its component traits. For this study, line x tester design of mating was used taking six genotypes as lines and four genotypes as testers. The variance analysis revealed significant differences for different sources of variation for most of the traits. The higher specific combining ability (SCA) values were compared to general combining ability (GCA) values. The higher degree of dominance indicated preponderance of non additive gene action. The dominance variance was predominant for all the characters except for pods per plant indicating the major role of non-additive gene action and it was highest for harvest index (HI) followed by plant height and days to 50% flowering. The parents, viz., BM 4 and JM 721 among line and AKM 8802 among testers exhibited positive significant effects and higher per se performance for seed yield per plant and other component traits and hence considered as superior parents. The hybrids viz., BM4 x PDM1, JM 10 x AKM 8802, JM 721 x PDM1, ML131 x HUM 1 and TARM 2 x TJM 3 were observed as superior specific combiners for seed yield per plant and its component traits. These hybrids or cross combinations might be utilized for further improvement of seed yield in green gram.

The combining ability of recombinant S-lines developed from an F2 maize population

2000 ◽  
Vol 134 (2) ◽  
pp. 191-198 ◽  
Author(s):  
C. G. IPSILANDIS ◽  
M. KOUTSIKA-SOTIRIOU
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Inbred Lines ◽  
High Yield ◽  
Source Population ◽  
Additive Gene Action ◽  
Maize Population ◽  
Ability Tests ◽  
Additive Gene ◽  
Per Se

Starting with the F2 generation of the single-cross commercial hybrid Lorena (PR3183), recombinant lines were developed combining half-sib/S1 evaluation on widely spaced plants in the direction of high yielding per se. Combining ability tests consisted of crosses between: (a) recombinant lines of common pedigree and (b) recombinant lines and freely available inbred lines. The highest-yielding crosses between recombinant lines reached 100% of the original F1 hybrid in a percentage of 14·2. Low heterosis was estimated owing to additive gene action of recombinant lines. Crosses between recombinant lines and freely available inbred lines outyielded significantly the commercial F1 hybrid in a percentage of 33·3. Heterosis was greater and the original F1 hybrid was outyielded significantly because of non-additive gene action. When the applied breeding procedure on a source population with high yield adaptability is adopted and where effects of intergenotypic competition masking the inherent genotypic value are controlled, population improvement may be substituted by combined half-sib/S1 selection for productivity of lines per se in low stress conditions during the very early stages.

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.

Estimation of combining ability and gene action for yield and its components in pigeonpea [Cajanus cajan (L.) Millspaugh]

2017 ◽  
Vol 51 (06) ◽  
Author(s):  
Rakesh Kumar Maida ◽  
M. P. Patel ◽  
Chandrabhan Ahirwar ◽  
A. M. Patel
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Block Design ◽  
Hybrid Breeding ◽  
Additive Gene Action ◽  
Randomized Block Design ◽  
Diallel Mating Design ◽  
Breeding Programmes ◽  
Additive Gene

Twenty eight hybrids developed by utilizing eight parents in 8 x 8 diallel mating design excluding reciprocals were evaluated in randomized block design with three replications for twelve characters in order to understand the combining ability and gene action in pigeonpea. The analysis of variance for combining ability revealed presence of additive and non- additive gene action. The ratio of gca/sca variance was less than unity which indicated the preponderance of non- additive gene action for action in the control of pod length, harvest index, protein content and leaf area. The estimates of general combining ability suggested that parents ICPL-87119, GT-103 and AGT-2 were good general combiners for seed yield per plant and its attributing characters while, hybrids UPAS-120 x GT-103, BSMR-853 x BANAS and BSMR-853 x GT-1 showed the higher order sca effect for seed yield per plant. These cross combinations can be potentially utilized in hybrid breeding programmes.

scholarly journals Combining Ability Studies Based on Mori CMS System in Indian Mustard [Brassica juncea (L.) Czern. & Coss.]

2020 ◽  
pp. 58-66
Author(s):  
Raju Ram Choudhary ◽  
Ram Avtar ◽  
R. K. Sheoran ◽  
. Samita ◽  
Deepak Kumar
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Indian Mustard ◽  
Research Area ◽  
F1 Hybrids ◽  
Main Shoot ◽  
Component Traits ◽  
Additive Gene ◽  
Overall Performance

An experiment for Line x tester analysis was carried out to estimate combining ability effects of 50 hybrids developed by crossing of 10 Mori CMS lines with five restorers in Indian mustard. The F1 hybrids along with parental genotypes planted at Oilseeds Research Area, Department of Genetics & Plant Breeding, CCS Haryana Agricultural University, Hisar India during 2018-19. Data recorded for 12 characters viz., days to 50% flowering, days to maturity, plant height (cm), number of primary branches per plant, number of secondary branches per plant, main shoot length (cm), numbers of siliquae on main shoot, siliquae length (cm), number of seeds per siliquae, 1000-seed weight (g), oil content (%) and seed yield per plant (g). Analysis of variance revealed sufficient genetic variability present among lines, testers and crosses for most of the traits. There was presence of both additive and non-additive gene actions with preponderance of non-additive gene action in controlling yield and component traits. On the basis of overall performance of parents, line MA-023 and tester MR-38 were found the best general combiners for majority of component traits including seed yield per plant. Other three lines viz; MA-8701, MA-8812 and MA-9301 were also observed as good general combiners for most of component traits including seed yield per plant. Tester MR-43 and MR-44 were found good general combiner for earliness. On the basis of per se performance and specific combining ability, crosses namely MA-9301 x MR-44, MA-8701 x MR-38 and MA-9705 x MR-31 were observed as superior cross combinations for seed yield in desirable direction.

scholarly journals Estimates of combining ability and standard heterosis for grain yield and various agromorphological traits in rice (Oryza sativa L.)

2017 ◽  
Vol 9 (1) ◽  
pp. 526-532
Author(s):  
Gaurav Kamboj ◽  
Pradeep Kumar ◽  
Devi Singh
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Breeding Method ◽  
Additive Gene Action ◽  
Component Traits ◽  
Additive Gene ◽  
Standard Heterosis ◽  
Half Diallel

A study was conducted for estimating combining ability and standard heterosis for grain yield and various agromorphological traits involving 10 parents and their 45 F1s (half diallel) during 2012-13 and 2013-14. The results of present investigation revealed that additive gene action played a predominant role in the inheritance of most of the traits under study. On the basis of general combining ability (GCA) effects and specific combining ability (SCA) effects, three parents (Vallabh Basmati 21, Pusa Basmati 1, CSR 13) and three crosses (Vallabh Basmati 21 x Pusa 1121, Pusa 1121 x CSR 13 and Pusa Basmati 1 x CSR 13) were found good general and specific combiners. The best combinations mostly involved good x good and good x poor parental GCA effects suggesting that there is addi-tive x additive and additive x dominance type of gene action for yield and other component traits. The cross showing additive gene action can be improved by pedigree breeding and selection can be postponed to later generations. The most appropriate breeding method for the exploitation of non additive gene action will be heterosis breeding. The six best cross combinations (Vallabh Basmati 21 x CSR 30, CSR 30 x CSR 13, Vallabh Basmati 21 x CSR 13, CSR 30 x Pusa basmati 1, Pusa basmati 1 x CSR 13 and Vallabh Basmati 21 x Pusa basmati 1) had significant standard heterosis for grain yield and other component traits. The crosses which showed significant standard heter-osis is highly suitable for commercial exploitation of heterosis in rice crop.

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.

Identification of superior parents and hybrids for improving pigeonpea [Cajanus cajan (L.) Millsp.] yield

2016 ◽  
Author(s):  
Yamanura ◽  
S. Muniswamy ◽  
SPACE Ramesh
Keyword(s):  
Seed Yield ◽  
Gene Action ◽  
Performance Standard ◽  
Male Sterile ◽  
Cross Combination ◽  
Additive Gene Action ◽  
Lattice Design ◽  
Additive Gene ◽  
Standard Heterosis ◽  
Per Se

A study involving three cytoplasmic-genetic male sterile lines and 14 diverse pollinators were crossed in a line × tester design during Kharif 2011. The resultant 42 hybrids and their parents were evaluated in a lattice design. Analysis of variance revealed that the ratio of variance due to GCA to SCA was less than unity for all the traits except secondary branches 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, GRG-2009-4 and ICPL-20 were good general combiners for seed yield and it’s direct components. 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 combination ICPA-2047 x GRG-2009-4 was good specific combiner for seed yield per plant, number of secondary branches and number of pods per plant.

scholarly journals The Effects of Combining Ability for Yield Traits in Rice (Oryza sativa L.) under Sodic Soil

2020 ◽  
pp. 34-44
Author(s):  
Durgesh Kumar Shukla ◽  
S. N. Singh ◽  
S. C. Gaur ◽  
Anil Kumar
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Hybrid Vigour ◽  
Yield Traits ◽  
Additive Gene Action ◽  
Early Maturity ◽  
Additive Gene ◽  
Rice Genotypes ◽  
Positive Effect

Information on combining ability is derived from data on twelve yield and yield contributing characters in fifteen male and three female parents utilised in line x tester fashion to estimate combining ability of rice genotypes under coastal saline condition. Forty Five hybrids generated from crossing three lines with fifteen testers were studied along with their parents for combining ability and gene action involved in the expression of characters in rice. The gca and sca effects were significant for all the characters. The magnitude of sca variance was higher than the gca variance for all the characters revealed the presence of predominance of non-additive gene action for all the characters under study. Halchal (-12.29) was found to be good general combiners for days to 50% flowering and early maturity, Halchal (-13.39). However, IR-24 (1.88) was good general combiners with significant positive effect for tallness. Magic (-12.05) good general combiners for dwarfness and Shriram 434 (1.57) was good general combiners for test weight however, Moti was best general combiner with gca estimates of 7.07 for harvest index and Kuber (3.48) was the good general combiners for yield/hill. Cross combinations RHR 27 x IR 24 (4.04) was significant and positive effect for yield/hill, performance for ear bearing tillers per plant were RHR 27 x IR 24 (1.88). In general, the crosses showing significant and desirable combining ability effects were associated with better per se performance for the respective traits. These hybrids could be utilized in heterosis breeding to exploit hybrid vigour.

scholarly journals Assessment of Combining Ability Effects for several Yield and Quality Traits in a Complete Diallel Cross of Strawberry (Fragaria × ananassa Duch.)

2017 ◽  
Vol 45 (2) ◽  
pp. 517-524
Author(s):  
Sorin CIULCA ◽  
Natalia CARP ◽  
Emilian MADOŞA ◽  
Adriana CIULCA ◽  
Radu ŞUMĂLAN
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Sugar Content ◽  
Fruit Weight ◽  
Yield Traits ◽  
Quality Traits ◽  
Additive Gene Action ◽  
Plant Yield ◽  
Yield And Quality ◽  
Additive Gene

Information on the inheritance of yield and quality traits is important for the selection of parents and breeding approaches to be adopted for the improvement of strawberry. The present study aimed to estimate the combining ability and gene effects for plant yield, fruits number/plant, fruit weight, pulp firmness and sugar content of strawberries in order to identify the best genitors and promising crosses, in 30 hybrids of six parents. The additive and non-additive gene action as well as the maternal effects was involved in the inheritance of the studied traits. For all traits, especially for fruit weight and plant yield, the additive gene action was more important than the non-additive one. The parents ‘A1’ and ‘Alba’ showed a higher concentration of favourable alleles for plant yield and fruits number, and they will allow the increase of plant yield when used as a donor of pollen and the increase of fruit number when used as a recipient of pollen. The variety ‘Marmolada’ was a good general combiner for sugar content, pulp firmness and fruit weight, especially when used as a female genitor. These parents could be used in hybridization in order to accelerate the genetic improvement of some yield and quality traits in strawberries. The cross ‘Mira’ × ‘Onda’ expressed desirable specific combining ability effects for yield traits and can be successfully use in strawberries breeding programs. In the case of ‘Alba’ × ‘Clery’ there is a high probability to select progenies with valuable yield traits associated with sweet fruits.

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