scholarly journals PENDUGAAN PARAMETER GENETIK PADA PERSILANGAN DIALEL BEBERAPA TETUA CABAI (Capsicum annuum L.)

2015 ◽  
Vol 24 (1) ◽  
pp. 1
Author(s):  
Sri Romaito Dalimunthe
Keyword(s):  
Combining Ability ◽  
Block Design ◽  
Diallel Analysis ◽  
Inbred Lines ◽  
Fruit Weight ◽  
High Genetic Diversity ◽  
Diallel Crossing ◽  
Recessive Genes ◽  
High Heritability ◽  
Materials Used

High genetic diversity in chili is the basis for a chili breeding program. One of the methods to increase diversity is through crossing. There are several crossing designs in order to produce new varieties, such as diallel crossing. Diallel analysis is a method for studying the inheritance of characteristics from various crossings. The aim of this research was to estimate the genetic parameters, the general combining ability (GCA) and specific combining ability (SCA) of six inbred lines of chili. The research was conducted in November 2008-May 2009 at the Experimental Farm Leuwikopo IPB. Genetic materials used were six inbred lines of chili (IPB C2, IPB C9, IPB C10, IPB C14, IPB C15 and IPB C20) and the F1s of the combination of six inbred lines. The experimental design was Randomized Complete Block Design with a single factor, namely genotype. The number of genotypes were 36 with three replications, so there were 108 units of experiment. The crossing design used was diallel crossing design. The results showed that there were no interaction between genes on the dichotomous height and fruit weight, significant additive effects, the control genes spread unevenly, and relatively high heritability values. Genotype which carried recessive genes the most was IPB C14 and genotype which carried the most dominant genes was IPB C10. IPB C10 showed the highest GCA for dichotomous height and IPB C2 showed the highest GCA on fruit weight. The crossing between IPB C2 x IPB C10 showed the highest SCA for dichotomous height. For fruit weight, crossing of IPB C2x IPB C14 had the highest SCA. Crossing combination of IPB C2 x IPB C14 was the best hybrid.

scholarly journals Pendugaan Daya Gabung dan Nilai Heterosis Hasil Persilangan Half Diallel Cabai Rawit (Capsicum annuum L.)

2017 ◽  
Vol 1 (1) ◽  
pp. 34
Author(s):  
Oktaviana Shinta Risty ◽  
Muhamad Syukur
Keyword(s):  
Capsicum Annuum ◽  
Combining Ability ◽  
Design Method ◽  
Block Design ◽  
Inbred Lines ◽  
Fruit Weight ◽  
Capsicum Annuum L ◽  
Randomized Complete Block Design ◽  
Plant Hybrid ◽  
Half Diallel

The aim of this research was to study estimation general combining ability (GCA) and specific combining ability(SCA) of six bird pepper inbred lines (Capsicum annuum L.), heterosis and heterobeltiosis of fifteen bird pepper hybrids in half diallel crosses. The experiment were conducted from November 2013 to April 2014 using a Randomized Complete Block Design with three replications at Leuwikopo University Farm, IPB. Analysis of GCA and SCA were based on the Griffing’s model of diallel design method II. Heterosis values were predicted based on the average values of their parents and heterobeltiosis were predicted based on the average values of the highest parents. Genotype IPB C174 had the highest GCA for fruit weight, fruit length, fruit width, and yield for each plant. Hybrid IPB C160 x IPB C291 and IPB C291 x IPB C293 had positive SCA, heterosis, and heterobeltiosis values for some variable observed. Hybrid IPB C174 x IPB C291 had better advantages than the commercial varieties which were Santika, Bhaskara, Sonar, and Nirmala on fruit weight characters.Keywords: bird pepper, combining ability, half diallel, heterosis

scholarly journals Combining ability of inbred lines of maize and stability of their respective single-crosses

2003 ◽  
Vol 60 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Aurélio Mendes Aguiar ◽  
Luciana Aparecida Carlini-Garcia ◽  
Adelmo Resende da Silva ◽  
Mateus Figueiredo Santos ◽  
Antonio Augusto Franco Garcia ◽  
...  
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Zea Mays L ◽  
Block Design ◽  
Diallel Analysis ◽  
Inbred Lines ◽  
Breeding Programs ◽  
Randomized Complete Block Design ◽  
Single Cross ◽  
Ear Height

The utilization of diallel crosses for identification of superior combinations is a common practice in maize (Zea mays L.) breeding programs. This methodology allows the estimation of the combining ability of genotypes being evaluated. In this work, five inbred lines were evaluated as to their general (GCA) and specific (SCA) combining abilities, by using a complete diallel scheme. The single-crosses produced between these inbred lines were evaluated in seven environments, along with two checks, by using a randomized complete block design. Traits analized were: grain yield, plant height, ear height, ear placement, and prolificacy. A diallel analysis was carried out, following an adaptation of Griffing's method IV, in addition to hybrid stability and adaptability analyses. Significant differences were detected for entries and environments for all traits. The interaction genotype vs. environment was significant for all traits. GCA's were significant for all traits, while SCA's were non-significant only for ear placement. For grain yield, both additive (GCA) and non-additive (SCA) effects were important, while for the remaining traits additive effects were more important. The high yielding single-cross was obtained from the cross of lines L-08-05F and L-38-05D. Those inbred lines showed higher GCA's and their cross also had high SCA; also, it is responsive to environment improvements and reasonably stable. The second in rank high yielding single-cross, L-46-10D x L-08-05F, showed wide adaptability and stability.

scholarly journals Implementation of partial diallel analysis to determine general combining ability and agronomic character genetic parameters of shade-tolerant maize lines

2021 ◽  
Vol 911 (1) ◽  
pp. 012019
Author(s):  
Roy Efendi ◽  
Muhammad Azrai
Keyword(s):  
Combining Ability ◽  
Genetic Parameters ◽  
Block Design ◽  
Diallel Analysis ◽  
General Combining Ability ◽  
Leaf Length ◽  
General Ability ◽  
Randomized Block Design ◽  
High Heritability ◽  
Ear Height

Abstract Information about combining ability and genetic parameters guide maize breeders in selecting parents and gene action of the desired trait. This study aims to determine the general combining ability of the yield characters of shading tolerant maize lines and the genetic parameters of their agronomic characters. This research was conducted at IP2TP Bajeng in December 2020-March 2021. The study was arranged in a randomized block design with three replications. The genotypes used were nine hybrids obtain from a partial diallelic (2x6). The results showed that line SHD3 showed good general ability for yield. High heritability values were shown by variables days to anthesis, days to silk, plant height, ear height, leaf length, leaf width, 100 grains weight and ear diameter.

scholarly journals Diallel analysis of maize resistance to Phaeosphaeria maydis

2004 ◽  
Vol 61 (1) ◽  
pp. 36-42 ◽  
Author(s):  
Herberte Pereira da Silva ◽  
José Roberto Moro
Keyword(s):  
Disease Severity ◽  
Block Design ◽  
Genetic Resistance ◽  
Diallel Analysis ◽  
Inbred Lines ◽  
Randomized Block Design ◽  
Whole Plant ◽  
Sources Of Variation ◽  
Specific Hybrid ◽  
Additive Genetic Effects

In breeding programs directed towards genetic resistance against diseases, the estimation of genetic parameters that control resistance allows the introduction of resistance into suscetible germplasm to be clearly focused. The purposes of this study were to estimate heterosis effects, and the general (GCA) and specific (SCA) combining abilities by using two rating methods for resistance to Phaeosphaeria maydis in a diallel analysis of 36 F1 maize hybrids and their nine inbred lines. Trials were conducted in three environments. Disease severity was evaluated in the whole plant (PI) and in the leaf positioned just below the point of insertion of the main ear (AFA). The trials followed a randomized block design with plots represented by a 5 m long rows. Differences among combining ability estimates for different environments and in both evaluation methods showed significant effects (P < 0.01) for environment (E), GCA, and GCA × E. The SCA, and SCA × E effects were not significant for any of the disease severity variables. The GCA effects were more important than SCA for this set of inbred lines, suggesting that additive genetic effects are the most important sources of variation for this trait. Heterosis effects for resistance were estimated, and it was possible to identify specific hybrid combinations between lines which have high potential for genetic control of this pathogen. Results for both disease severity variables were practically identical, even though the PI method was more convenient to use.

scholarly journals Short communication: Heterosis and combining ability of Nepalese yellow maize (Zea mays L.)

2013 ◽  
Vol 3 ◽  
pp. 172-180 ◽  
Author(s):  
SR Gautam ◽  
BR Ojha ◽  
SK Ghimire ◽  
DB Gurung
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Quantitative Traits ◽  
Short Communication ◽  
Zea Mays L ◽  
Block Design ◽  
Winter Season ◽  
Inbred Lines ◽  
High Magnitude ◽  
Randomized Complete Block Design

Nepalese yellow maize inbred lines were characterized for general combining ability (GCA) and specific combining ability (SCA) of their crosses and parents were identified having high combining ability for determining the heterotic effects on yield and other quantitative traits of hybrids. A line x tester mating design was used for making the crosses in the winter season of 2008 and the hybrids along with their parents and four checks were evaluated in Randomized Complete Block Design (RCBD) with three replications in the spring season of 2009 at the experimental farm of the National Maize Research Program, Chitwan. Significant variations were found among the treatments for grain yield and other traits which indicated presence of high magnitude of genetic variations among tested inbred lines. The cross between RML-32 and RML-17 produced the highest grain yield (15870 kg/ha) among the crosses. Hybrids such as RL-194 x RL-84 (10770 kg/ha), RML-21 x RML-17 (9270 kg/ha), RL-180 x RML-17 (9270 kg/ha) and L-1 x RL-84 (8785 kg/ha) were found superior grain yielder. Thirty-nine hybrids showed positive mid-parent heterosis for grain yield among 40 crosses. The highest positive mid-parent heterosis for grain yield was found 880% in cross between RML-32 and RML-17, followed by RL-98X RML-17 (507%), RL-103 x RML-17 (403%), PUTU-18 x RML- 17 (351%) and RL-180 x RL 84 (316%). Agronomy Journal of Nepal (Agron JN) Vol. 3. 2013, Page 172-180 DOI: http://dx.doi.org/10.3126/ajn.v3i0.9020

scholarly journals COMBINING ABILITY STUDIES FOR GROWTH AND YIELD CHARACTERS OF BHENDI ABELMOSCHUS ESCULENTUS (L.) MOENCH)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
S. Kalaiselvan ◽  
S. Anuja
Keyword(s):  
Plant Height ◽  
Combining Ability ◽  
Block Design ◽  
Fruit Weight ◽  
Growth And Yield ◽  
F1 Hybrids ◽  
Randomized Block Design ◽  
Final Harvest ◽  
Weight Number ◽  
Number Of Branches

The present investigation consisted of 9 lines, 3 testers with their 27 F1 hybrids developed through line x tester mating fashion in randomized block design with three replications. Parents and hybrids differed significantly for gca and sca effects, respectively. Among the parents, maximum gca effect was found in EC 112241 and Aruna for inter node distance, EC 112241 and Arka Anamika for single fruit weight, EC 109454, EC 169344 and Arka Anamika for number of branches per plant, EC 169331 and Arka Anamika for number of fruits per plant, EC 109454 and Aruna for plant height at final harvest. The crosses exhibited maximum positive significant sca effect was observed in EC 112241 x Aruna, EC 109454 x Kashi Kranti and EC 112264 x Aruna were found as good specific combiners for single fruit weight, number of branches per plant and number of fruits per plant respectively. The hybrid EC 112264 x Aruna exhibited maximum significant negative sca effects for inter node distance and plant height at final harvest.

scholarly journals Additive and non-additive genetic variance in odontometric traits in crosses of seven inbred lines of house mice

1974 ◽  
Vol 23 (2) ◽  
pp. 207-217 ◽  
Author(s):  
Larry J. Leamy ◽  
R. W. Touchberry
Keyword(s):  
Combining Ability ◽  
Additive Genetic Variance ◽  
Diallel Analysis ◽  
Inbred Lines ◽  
House Mice ◽  
Reciprocal Effects ◽  
X Irradiation ◽  
The Mean ◽  
Positive Heterosis ◽  
Number Of Individuals

A least-squares diallel analysis of the offspring of crosses of seven inbred lines of house mice was performed for the mean widths of the second (M2) and third (M3) mandibular molars. Significant differences among lines, as well as between inbreds and hybrids (positive heterosis) were found for these characters. Estimates of the heritabilities (from general combining ability variances) were high for both teeth as were estimates of maternal effects. Specific combining ability and reciprocal effects were significant only for the M3. Additionally, X-irradiation reduced the mean number of individuals per litter, and thereby indirectly influenced the widths of both molars.

scholarly journals Potential of parents and hybrids experimental of the yellow melon

2020 ◽  
Vol 50 (2) ◽  
Author(s):  
José Galdino Cavalcante Neto ◽  
Karmita Thainá Correia Ferreira ◽  
Fernando Antonio Souza de Aragão ◽  
Rafaela Priscila Antônio ◽  
Glauber Henrique de Sousa Nunes
Keyword(s):  
Combining Ability ◽  
Cucumis Melo ◽  
Diallel Analysis ◽  
Fruit Weight ◽  
General Combining Ability ◽  
Economic Importance ◽  
Additive Effects ◽  
Agronomic Potential ◽  
Cucumis Melo L ◽  
Partial Diallel

ABSTRACT: Melon or muskmelon (Cucumis melo L.) is of considerable economic importance in Brazil. Nearly all the cultivars currently grown are hybrids. Heterosis has been used to advantage in the melon plant, and the use of uniform hybrids is one of the reasons for successful cultivation. The aim of the present study was to evaluate the agronomic potential of yellow melon lines and hybrids. An experiment was conducted in randomized blocks with three replications to evaluate 24 hybrids generated by crosses among three elite lines used as female parents (AF-01, AF-02, and AF-03) and eight lines used as male parents (LAM-01, LAM-02, LAM-03, LAM-04, LAM-05, LAM-06, LAM-07, and LAM-08). Yield and fruit quality traits were evaluated. Partial diallel analysis was carried out to estimate general combining ability and specific combining ability. Additive and non-additive effects were observed for the yield, mean fruit weight, and pulp thickness traits. The lines AF-02, LAM-02, and LAM-03 are the most promising as parents as they more frequently have favorable alleles. The most prominent hybrids in diallel analysis were AF-02 x LAM-02, AF-02 x LAM-03, AF-02 x LAM-04, and AF-03 x LAM-06.

scholarly journals Selection indices for fruit yield improvement in elite cucumber (Cucumis sativus L.) cultivars

2021 ◽  
Vol 24 (2) ◽  
pp. 89-95
Author(s):  
Emmanuel Ohiosinmuan Idehen ◽  
Paul Chiedozie Ukachukwu ◽  
Francis Abayomi Showemimo
Keyword(s):  
Cucumis Sativus ◽  
Block Design ◽  
Morphological Characters ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Yield Data ◽  
Cucumis Sativus L ◽  
High Heritability ◽  
Correlation And Path Analysis ◽  
Variance Estimates

Abstract Cucumber (Cucumis sativus L.) is an important vegetable crop, rich in vitamins and minerals and eaten fresh as a dessert. Its fruit yield is relatively low, though could be improved through knowledge of character association with it and selection of desirable materials for improvement programmes. Fifteen cultivars of Cucumber were evaluated at two locations (Abeokuta and Ibadan), South West, Nigeria in a randomized complete block design with three replicates in order to determine heritability, correlation, direct and indirect effects of characters on fruit yield. Data collected on agro-morphological characters were subjected to analysis of variance, estimates of heritability, correlation, and path analysis. Significant variations (p <0.05) were observed in the cultivars. High heritability estimates (>90%) was observed for fruit length at both locations. A significant phenotypic and genotypic correlation was observed between fruit yield and fruit weight. Number of days to 50% flowering and fruit width could also be selected directly for improvement of fruit yield in cucumber.

scholarly journals Genetic Performance of Some Watermelon [Citrullus lanatus (Thumb.) Mastum and Nakai] Genotypes in Humid Tropical Agro-ecology

2021 ◽  
pp. 141-148
Author(s):  
Linus Joseph Agah ◽  
Emmanuel Sariel Ankrumah ◽  
Patrick Odey Ukatu ◽  
Macauley Asim Ittah ◽  
Grace Sunshine David
Keyword(s):  
Genetic Gain ◽  
Citrullus Lanatus ◽  
Block Design ◽  
Fruit Weight ◽  
Genetic Advance ◽  
Branch Number ◽  
High Heritability ◽  
Heritability Estimates ◽  
Male Flowers ◽  
Baby Doll

Six varieties of watermelon (Sugar baby, Sugar dragon, Kaolack, Crimson sweet, Koloss and baby doll) were evaluated in the field to assess the genetic parameters associated with morphological traits in the watermelon genotypes. The experiment was laid out in Randomized Complete Block Design (RCBD) in three replications. There were variations in number of branches per plant, vine length, number of days to 50% flowering, number of male flowers, number of fruits per plant and fruit weight per plant.  Low response to selection and genetic variation was observed in most traits.  The number of days to 50% flowering had the highest heritability estimates (97%), genetic gain of 15.84% and genetic advance of 5.33. Fruit weight per plant had high heritability estimates of 89%, moderate genetic gain of 46.20% and genetic advance of 2.31. Moderate broad sense heritability estimates ranging from 55% for number of male flowers per plant to 63% for number of fruits per plant. Mean branch number had the highest genetic gain of 49.33% but moderate heritability estimates of 58.91% signifying moderate response of selection. Koloss and Kaolack had the highest genetic performance for fruits yield than Baby doll and other varieties plant in the humid environment. Therefore, Koloss and Kaolack is recommended in the humid ecology and should be cultivated in the ecological zone.

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