Combining Ability and Rank Correlations in a Diallel Cross of Indian Mustard (Brassica juncea)

1977 ◽  
Vol 13 (1) ◽  
pp. 71-79 ◽  
Author(s):  
A. N. Asthana ◽  
V. K. Pandey
Keyword(s):  
Oil Content ◽  
Gene Action ◽  
Indian Mustard ◽  
Branch Length ◽  
Diallel Cross ◽  
Flower Number ◽  
Additive Gene Action ◽  
Branch Number ◽  
Additive Gene ◽  
Per Se

SUMMARYA diallel cross study on Indian mustard revealed a preponderance of additive gene action for seven characters out of the nine studied. Plant height and seeds per siliqua seemed to be controlled by both additive and non-additive gene action. Days to flower, number of secondary branches, length of main branch, number of siliquae on the main branch, length of siliqua and yield per plant were mainly controlled by additive gene action, whereas oil content was determined mainly by non-additive gene action. Heterosis was prevalent and the maternal effect was not generally apparent in the crosses. Rank correlations established a positive correlation between performance per se and GCA, and between heterosis and SCA.

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.

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.

scholarly journals Combining ability analysis for yield and yield contributing traits in maize (Zea mays L.)

2019 ◽  
Vol 44 (2) ◽  
pp. 253-259
Author(s):  
HZ Raihan ◽  
S Sultana ◽  
M Hoque
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Combining Ability ◽  
Gene Action ◽  
Diallel Cross ◽  
Grain Weight ◽  
Thousand Grain Weight ◽  
Additive Gene Action ◽  
Additive Gene ◽  
1000 Grain Weight

An experiment on combining ability was carried out with 21 crosses produced from 7×7 diallel cross without reciprocal for grain yield and yield contributing characters in maize. Analysis of variance for combining ability showed that mean square (MS) due to GCA & SCA were highly significant for all characters except GCA in plant height, cob length and 1000 grain weight and SCA in maturity and row/cob indicated that all but mentioned traits were governed by both additive and non-additive gene action. Variances due to GCA were higher for all characters except thousand grain weight revealed that the predominance of additive gene action for all characters except thousand grain weight. Parent CML 487 and Ki 21 were the best general combiner for yield and most of the yield contributing characters. Parent BMZ 57 & BMZ 15 were the best general combiner for dwarf & earliness in plant. Among all the crosses CML 473 × Ki 21, CML 487 × Ki 21 and CML 429 × BIL 182 exhibited significant positive SCA effect for grain yield. The cross CML 429 × BIL 182 may be considered as the best cross with recorded significant mean value and desired SCA for traits like 1000 grain weight, yield (t/ha), days to 50% pollen shedding, days to 50% silking, plant height, ear height and days to maturity. The promising single crosses with significant and positive SCA could be used for variety development after verifying them across locations. Bangladesh J. Agril. Res. 44(2): 253-259, June 2019

scholarly journals Exploitation of combining ability and heterosis for development of maize hybrids for tarai region of Uttarakhand

2016 ◽  
Vol 8 (3) ◽  
pp. 1570-1575
Author(s):  
Manjeet Kumar ◽  
S. S. Verma ◽  
Meenakshi Uniyal ◽  
Anupam Barh ◽  
N.K. Singh
Keyword(s):  
Grain Yield ◽  
Gene Action ◽  
Kernel Weight ◽  
Additive Gene Action ◽  
Maize Hybrids ◽  
Additive Gene ◽  
Standard Heterosis ◽  
Per Se ◽  
Level Of Significance ◽  
Heterosis Breeding

The present investigation was carried out with fifty six genotypes involving 10 parents, their 45 F1s hybrids and one check hybrid in tarai region of Uttarakhand. The presence of more amount of variance due to SCA effects than GCA effects in our experimental material indicated that heterosis breeding is better choice. The good general combiners were P1, P3 and P4 for ear length; P8 for ear diameter; P5 and P8 for number of kernel rows per ear; P1 and P4 for number of kernels per row, P8 and P9 for100-kernel weight and P5 for grain yield, which can be utilized directly or indirectly in breeding programme. The best eight specific combiners for grain yield were P1xP8, P4xP10, P7xP8, P5xP8, P5xP9, P4xP9, P1xP2 and P5xP10 involving average x average, good x average, good x poor and average x poor parental combinations of generalcombining ability indicating the presence of non-additive gene action. The nine crosses, P1xP2, P1 xP5, P1xP8, P4xP9, P4xP10, P5 xP8, P5xP9, P5xP10 and P7xP8 had positive significant per cent heterosis for grain yield, and crosses namely P1xP4, P1xP5 and P1xP8 for ear length; P1xP3 and P1xP5 for number of kernels per row and P1xP8 and P9x P10 for 100-kernel weight were having positive significant per cent heterosis at 1% and/or 5% level of significance for respective traits. The crosses, P1xP2, P1xP8, P4xP9 andP7xP8 manifested high SCA effects along with excellent standard heterosis and per se performance for grain yield and also for most of the studied characters, therefore, classified as potential hybrids.

Heterosis and combining ability for yield and other agronomic traits in Triticale

2018 ◽  
Vol 3 (1) ◽  
pp. 38-45 ◽  
Author(s):  
Enzo Ferrari ◽  
Aurora Picca ◽  
Rodolfo Domínguez ◽  
Héctor Paccapelo
Keyword(s):  
Combining Ability ◽  
Gene Action ◽  
Agronomic Traits ◽  
Diallel Cross ◽  
Kernel Weight ◽  
Selection Strategy ◽  
Additive Gene Action ◽  
Additive Gene ◽  
Additive Genetic Effects ◽  
Cross System

Abstract The estimation of genetic parameters such as heterosis (Mh), heterobeltiosis (Hh), general combining ability (GCA) and specific combining ability (SCA) allows inferences about the predominant action of the genes, indicates the appropriate selection strategy, and facilitates identification of the best parents. The present study was carried out using a diallel cross system among five genotypes of Triticale (x Triticosecale Wittmak). Genotypes CIMMYT 829 (G1), CIMMYT 830 (G2), CIMMYT 834 (G3), CIMMYT 820 (G4) and Antonio UNLPam (G5) were crossed in a complete diallel combination without reciprocal crosses, in La Pampa, Argentina. The additive genetic effects were of greater importance than the nonadditive ones for the following traits: spike length (SL), days to anthesis (AD), spikelets per spike (SS); grains per spike (GS), 1000-kernel weight (1000-KW), grain yield (GY), test weight (TW) and harvest index (HI). The G1 and G4 parents showed better GCA for GY, HI, 1000-KW and SL indicating a greater contribution of additive gene action and a promising feature to obtain prominent recombination lines. The G1xG4 cross showed Hh and a significant SCA value for GY, indicating a greater contribution of the non-additive gene action, useful to develop hybrids.

scholarly journals Genetic control of characters associated with bean golden mosaic geminivirus resistance in Phaseolus vulgaris L.

1997 ◽  
Vol 20 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Luis Alberto Pessoni ◽  
Maria José de O. Zimmermann ◽  
Josias Corrêa de Faria
Keyword(s):  
Phaseolus Vulgaris ◽  
Gene Action ◽  
Block Design ◽  
Diallel Cross ◽  
Viral Disease ◽  
F1 Hybrids ◽  
Phaseolus Vulgaris L ◽  
Additive Gene Action ◽  
Randomized Block Design ◽  
Additive Gene

Bean golden mosaic is the most important viral disease of the bean crop (Phaseolus vulgaris L.) in Latin America. The genetics of resistance to a Brazilian strain of bean golden mosaic virus (BGMV), was studied in a 4 x 4 diallel cross without reciprocals, among the parental genotypes DOR 303, EMGOPA 201 Ouro, Carnaval, and Redlands Greenleaf C. Seedlings of the four parents, six F1 hybrids, 12 backcrosses, and F2 generations for each combination were inoculated on the eighth day after sowing by exposure to a viruliferous whitefly (Bemisia tabaci Genn.) population for 24 h, in a glasshouse, prior to transplantation to field conditions. The full set of two parents, F1, F2 and respective backcrosses for each combination was considered to be a family. Data were recorded and analyzed for foliar yellowing, plant dwarfing, and pod malformation, using a randomized block design, with two replications. Weighted generation mean analysis was performed for each of the six families. An additive gene action model was significant for the three characteristics evaluated. On the other hand, non-additive gene action had greater absolute value in most cases. Resistance to foliar yellowing conferred by genes from DRO 303 was highly heritable and was expressed equally well in the different genetic backgrounds evaluated. Such resistance may be oligogenic. Broad- and narrow-sense heritabilities were relatively high for all response traits. The three traits studied were all positively correlated, indicating that they can be simultaneously selected for enhancement. The highest correlation coefficient was obtained for dwarfing x pod malformation.

scholarly journals General and Specific Combining Ability in Sesame (Sesamum indicum L.) for Seed Yield and Related Traits

2021 ◽  
pp. 81-87
Author(s):  
S. H. Prakash ◽  
Tapash Dasgupta
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Oil Content ◽  
Gene Action ◽  
Diallel Cross ◽  
Breeding Strategy ◽  
Specific Combining Ability ◽  
Yield Potential ◽  
High Yield ◽  
Additive Gene

Combining ability study on seed yield per plant from a 7x 7 half-diallel cross of sesame over two years showed that both general combining ability (gca) and specific combining ability (sca) variances important for controlling the traits. Thus, the objectives of this study were to evaluate the gene action and select appropriate parents/crosses using combining ability analysis. Both additive and non additive was of greater significance for seed yield per plant, capsules per plant, days to flowering and oil content. Non additive genetic variances were in the genetic for 1000 seed weight and branches per plant. On the contrary preponderance of additive genetic was found in the inheritance of capsule length and seeds per capsule. The relative magnitude non-additive year interaction was larger than additive x year interaction. The variety Suprava was the best general combiner for seed yield and its major components except oil content. The cross combinations Suprava x Savitri, Suprava x JLT 408 and EC 90 x Savitri would be the best choices for obtaining desirable recombinants. Suprava x Savitri having additive gene control emerged as the best specific combiner for yield and its components except oil content. For improving seed yield and oil content simultaneously, the specific combiner IC 59 x Savitri was identified to be ideal as this cross mostly controlled by additive gene action and hence desirable recombinants can be obtained in early segregating generation. Breeding strategy for different crosses has been discussed in details. The information could help sesame breeders for appropriate selection of parents with high yield potential and oil content to develop future hybridization programs.

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 (%).

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.

GENE ACTION FOR PROTEIN AND OIL CONTENT IN SUMMER RAPE

1977 ◽  
Vol 57 (3) ◽  
pp. 625-631 ◽  
Author(s):  
BAHRAM GRAMI ◽  
B. R. STEFANSSON
Keyword(s):  
Brassica Napus ◽  
Genetic Control ◽  
Oil Content ◽  
Gene Action ◽  
Additive Gene Action ◽  
Brassica Napus L ◽  
Percent Protein ◽  
Additive Gene ◽  
Selection For

Genetic control of percent protein, percent oil, and sum of protein and oil as a percentage of the seed was investigated in two summer rape (Brassica napus L.) cultivars, Midas and Tower, and their F1, F2 and backcross generations. All three traits were found to be governed by additive gene action. Dominance was not significant and epistasis was absent. Selection for sum of protein and oil was shown to be more effective than selection for either protein or oil alone.

Sign in / Sign up

Export Citation Format

Share Document