scholarly journals Selection of elite parents and crosses for seed yield and its components using combining ability analysis over the three environments in safflower (Carthamus tinctorious L.)

2021 ◽  
Vol 81 (01) ◽  
pp. 139-143
Author(s):  
Indrayani H. Thorat ◽  
V. L. Gawande
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Genetic Improvement ◽  
Mating Design ◽  
Individual Traits ◽  
Combining Ability Analysis ◽  
Consistent Performance ◽  
Selection Of ◽  
Heterosis Breeding

Thirty crosses developed through line × tester mating design were evaluated along with parents in three environments to estimate gca and sca effects of parents and crosses, respectively for yield and its contributing traits. Based on consistent performance over three environments in safflower (Carthamus tinctorious L.) genotypes, BHIMA, GMU 3876, GMU 3863, GMU 7351, GMU 2757, AKS 08R and AKS CMS 2B were found to be good general combiners for yield and most of yield contributing characters. Hybrids, AKS CMS 2A x BHIMA, AKS CMS 2A x GMU 3876 and AKS CMS 2A x GMU 3863 having high sca effects were found promising for seed yield per plant and other traits over the three environments. The results indicated that these parents could be exploited in hybridization programmes for genetic improvement of individual traits. However, the promising hybrids having high sca effects may be used for heterosis breeding after multi-locations testing.

scholarly journals Quantitative Genetic Analysis of Fruit Quality in Pear

1990 ◽  
Vol 115 (5) ◽  
pp. 829-834 ◽  
Author(s):  
R.L. Bell ◽  
Jules Janick
Keyword(s):  
Fruit Quality ◽  
Combining Ability ◽  
Genetic Improvement ◽  
Quality Index ◽  
Quality Characteristics ◽  
General Combining Ability ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Quantitative Genetic ◽  
Selection Of

Narrow-sense heritability estimates were computed for five fruit quality characteristics and their weighted total index. Grit content and skin russeting were moderately heritable traits, while flesh texture, flavor, appearance, and the weighted total score were of relatively low heritability. Within sub-populations of crosses, defined by the species ancestry of the parents, the relative magnitudes of heritabilities for each trait varied, but were in general agreement with those for the entire population. The general combining ability variances were 4.5 to 12.0 times those for specific combining ability, although both were statistically significant for all traits and the weighted quality index. The species ancestry of a parent had no effect on its general combining ability rank. While selection of individual seedlings on the basis of their own phenotype will result in genetic improvement for grit and russet, selection based on a combination of full-sib family means and individual phenotypes is recommended for flavor, texture, appearance, and overall fruit quality.

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.

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 COMBINING ABILITY FOR FLOWERING AND YIELD TRAITS OF JATROPHA (Jatropha curcas L)

2017 ◽  
Vol 29 (1) ◽  
pp. 1-10
Author(s):  
A. K. M. Aminul Islam ◽  
N. Anuar ◽  
Z. Yaakob ◽  
M. Osman
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Yield Traits ◽  
Cross Combination ◽  
Components Of Variance ◽  
Genetic Components ◽  
Combining Ability Analysis ◽  
The Cross ◽  
Half Diallel ◽  
Positive Effect

An experiment was conducted with 6 × 6 half diallel population to determine the combining ability for yield characters in Jatropha. Combining ability analysis revealed that both general and specific combining ability variances were significant for all the characters studied. GCA was observed to be higher in magnitude for majority of the characters except number of inflorescence per plant indicating that these characters were predominantly under additive genetic control. The non additive components of variance were also involved in the inheritance of number of inflorescence per plant. The parent P1 was the best general combiner for most of the traits including earliness and seed yield per plant and P5 was the poor general combiner for all the traits except hundred seed weight. Higher negative SCA effect was found in the cross combination P1×P3 for earliness and positive effect for seed yield per plant. Finally, it can be concluded that both additive and dominant genetic components are important for earliness and seed yield in Jatropha. The cross combination P1×P2, P1×P3, P2×P5 and P4×P6 is found promising for earliness and seed yield per plant. These combinations could be selected for the development of hybrid varieties in Jatropha.

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