scholarly journals Estimating Combining Ability Effect of the Indian and Exotic Lines of Tomatoes by Partial Diallel Analysis

2015 ◽  
Vol 3 (9) ◽  
pp. 715
Author(s):  
Suresh Baban Dagade ◽  
Nanadasana Jagdish Nasibhai ◽  
Hariprasanna Krishna ◽  
Bhatt Virendra Mulshankar ◽  
Dhaduk Lallubhai Keshavbhai ◽  
...  
Keyword(s):  
Combining Ability ◽  
Additive Genetic Variance ◽  
Diallel Analysis ◽  
Fruit Weight ◽  
General Combining Ability ◽  
Fruit Firmness ◽  
Equatorial Diameter ◽  
Additive Gene ◽  
F2 Generation ◽  
Pericarp Thickness

Eight nearly homozygous, horticulturally superior and optimally divergent lines of tomato having Indian and exotic adaptability were used for carrying out half diallel design to study General Combining Ability (GCA) and Specific Combining Ability (SCA) estimates for fruit weight, polar and equatorial diameter, locules fruit-1, pericarp thickness and fruit firmness. The variances due to both GCA and SCA were significant, suggesting that both additive and non additive genetic variance were involved for genetic control of the character fruit polar and equatorial diameter, and locules number in F1 and F2 generations. However, the variance due to GCA was more pronounced for fruit weight, pericarp thickness and firmness as a result of additive gene action. Due to their high general combining ability effects, exotic parents Ec 490130 and Ec 177371 producing firm fruited small to medium sized tomato fruits having constant expression of GCA effects over the generationsregarded as best general combiners. The crosses GT 1 x Ec 490130 and Ec 490130 x Ec 398704 having high x high and high x low combinations, respectively in F1. While in F2, GT 1 x Ec 177371 and H 24 x Ec 490130 having high x high and high x low combining lines were considered as best crosses for greater fruit firmness. Therefore, heterosis breeding in F1 and selection of desirable lines in F2 generation is recommended for further improvements were suggested for future hybridization programmes.

scholarly journals Diallel Analysis of Chilli Pepper (Capsicum annuum L.) Genotypes for Morphological and Fruit Biochemical Traits

Plants ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Aiswarya C. S. ◽  
Vijeth S ◽  
Sreelathakumary I ◽  
Prashant Kaushik
Keyword(s):  
Vitamin C ◽  
Combining Ability ◽  
Yield Components ◽  
Diallel Analysis ◽  
General Combining Ability ◽  
Biochemical Traits ◽  
Chilli Pepper ◽  
Gene Effects ◽  
Commercial Cultivation ◽  
Additive Gene

Chilli pepper is commercially cultivated as a spice and is also used for the extraction of a colouring agent. Here, we performed a diallel genetic study involving five chilli pepper varieties. Parents and their hybrid were evaluated for fifteen morphological and five biochemical traits over two crop seasons under open field conditions. Variation was recorded for all of the studied traits. Similarly, significant values for general combining ability (GCA) and specific combining ability (SCA) variance were obtained for all of the traits. The ratio of σ2 SCA/σ2 GCA indicates that non-additive gene effects were predominant for all the studied traits except for fruits plant−1. Based on SCA effects, cross combinations P2 × P5, and P4 × P5 were determined excellent for flesh thickness, yield components and vitamin C. These hybrids are recommended for multilocation testing to assess their suitability for commercial cultivation. Overall, this work presents useful information regarding the genetics of important morphological and biochemical traits in chilli pepper.

scholarly journals Combining ability analysis in near homozygous lines of okra [Abelmoschus esculentus (L.) Moench] for yield and yield attributing parameters

2017 ◽  
Vol 9 (1) ◽  
pp. 324-331
Author(s):  
Y. A. Lyngdoh ◽  
R. Mulge ◽  
A. Shadap ◽  
Jogendra Singh ◽  
Seema Sangwan
Keyword(s):  
Combining Ability ◽  
Genetic Variance ◽  
Gene Action ◽  
Additive Genetic Variance ◽  
Total Yield ◽  
Fruit Weight ◽  
Additive Gene Action ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
Number Of Branches

Line × tester analysis was carried out with the objective of identifying the good combiners and to decide the breeding strategies for developing potential and productive genotypes or cultivars. Parents and hybrids differed significantly for GCA and SCA effects for all the characters respectively. Specific combining ability (SCA) variance was higher than the general combining ability (GCA) variance which shows the predominance of non-additive gene action for the improvement of all the characters studied. The parents and crosses having highest and significant GCA and SCA effects viz., KO-18 (13.69), KO-6 (9.54) and KO-2 × Parbhani Kranti (19.28) for plant height; KO-12 (0.34), KO-14 (0.19) and KO-5 × V5 (0.60) for number of branches per plant; KO-14 (-0.66) and KO-15 × Arka Anamika(-1.66) for days to first flowering; KO-1(1.10), Arka Anamika (0.46) and KO-9 × VRO-5 (3.28) for fruit length; KO-7 (7.91), VRO-5(1.68) and KO-18 × VRO-6 (8.64) for average fruit weight; KO-2 (1.18) and KO-17 × Arka Anamika (2.80) for number of fruits per plant; KO-9(0.05), VRO-6 (0.01) and KO-11 × VRO-6 (0.10) for total yield per plant were identified as good general and specific combiners. The results establish the worth of heterosis breeding for effective usage of non-additive genetic variance in okra.

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.

Thrips (Thysanoptera: Thripidae) Tolerance in Cotton: Sources and Heritability

1997 ◽  
Vol 32 (4) ◽  
pp. 460-471 ◽  
Author(s):  
Daryl T. Bowman ◽  
Jack C. McCarty
Keyword(s):  
North Carolina ◽  
Gossypium Hirsutum ◽  
Combining Ability ◽  
Genetic Variance ◽  
Additive Genetic Variance ◽  
General Combining Ability ◽  
Sources Of Resistance ◽  
Gossypium Hirsutum L ◽  
F2 Generation ◽  
F1 Generation

Thrips (Thysanoptera: Thripidae) resistance or tolerance in cotton, Gossypium hirsutum L., is often associated with extreme pubescence. This is undesirable because hairy (pubescent) plants tend to have more trash in harvested lint which reduces the price received by growers. Two other possible sources of resistance include gossypol and thick lower epidermal cells, the latter has been found in G. barbadense L. Five G. barbadense genotypes were mated in a North Carolina Design II to 4 upland cultivars to evaluate combining ability. In addition, 90 converted racestocks were screened for tolerance to thrips. Experiments were designed to evaluate tolerance or resistance by comparing plots with and without thrips. Two G. barbadense parents had tolerance to thrips while two upland cultivars also exhibited tolerance. In the F1 generation, general combining ability was significant for thrips damage ratings among the G. barbadense parents. In the F2 generation, all characters exhibited specific combining ability. Thus, non-additive genetic variance predominates measures of thrips tolerance.

Combining Ability for Large Pod and Seed Traits in Peanut1

1993 ◽  
Vol 20 (1) ◽  
pp. 49-52 ◽  
Author(s):  
W. F. Anderson ◽  
M. S. Fitzner ◽  
T. G. Isleib ◽  
J. C. Wynne ◽  
T. D. Phillips
Keyword(s):  
Seed Size ◽  
Combining Ability ◽  
Germplasm Collection ◽  
Female Parent ◽  
Pure Line ◽  
Transgressive Segregation ◽  
General Combining Ability ◽  
F1 Hybrids ◽  
Additive Gene ◽  
F2 Generation

Abstract Recently, the peanut (Arachis hypogaea L.) industry has expressed a greater need for higher percentages of fancy pods and extra large kernels (ELK), especially for use in large-seeded in-shell products. Genetic control of these traits has been reported to range in complexity from simple inheritance to the inclusion of multiple modifier genes. This study was conducted to determine the general combining ability (GCA) effects of 50 peanut genotypes on pod and seed size. Each genotype was used five times as a female parent and five times as a male parent in a partial diallel crossing program. F1 hybrids were grown and their pods were harvested for measurements of pod and seed size. The F2 generation was planted the following year and similar measurements were recorded using the single pod descent procedure. Individual F2 plants were harvested and pod and seed characteristics measured for segregation information within four crosses. General combining ability effects were not well correlated between generations (r=0.53-0.56) or with the same traits measured on pure-line parents (r=0.32-0.42). PI 298845, PI 314897, PI 325079, Jenkins Jumbo, and Fla 393-8-1-1-1-1-1-2 had consistently large positive GCA effects on pod and seed weight. F2 segregation patterns indicated that some crosses exhibit predominantly additive gene action while one cross (PI 270818 / PI 269111) showed dominance toward smaller pods. Transgressive segregation occurred for pod and seed size traits in four crosses. Substantial genetic variability for pod and seed size remains in the peanut germplasm collection.

scholarly journals Combining Ability and Heterosis for Capsaicinoids in Capsicum pubescens

HortScience ◽  
2001 ◽  
Vol 36 (7) ◽  
pp. 1315-1317 ◽  
Author(s):  
Yayeh Zewdie ◽  
Paul W. Bosland ◽  
Robert Steiner
Keyword(s):  
Combining Ability ◽  
Recurrent Selection ◽  
Gene Action ◽  
Diallel Analysis ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Breeding Method ◽  
Additive Gene Action ◽  
Gene Effect ◽  
Additive Gene

The inheritance of capsaicinoid content was studied in five Capsicum pubescens Ruiz & Pav. genotypes using diallel analysis. General combining ability and specific combining ability effects were significant for all capsaicinoids studied, indicating additive and nonadditive gene actions are present. The association of high capsaicinoid contents with high positive general combining ability of the parents also indicates the predominance of additive gene action in capsaicinoid inheritance. Because of the predominant additive gene effect, recurrent selection would be a good breeding method to increase capsaicinoid level in the population studied. Heterosis was observed in hybrids for some of the capsaicinoids, suggesting that F1 hybrids could also be used to increase capsaicinoid content.

scholarly journals COMBINING ABILITY ANALYSIS FOR FRUIT YIELD AND ITS COMPONENT TRAITS IN BHENDI (ABELMOSCHUS ESCULENTUS (L.) MOENCH)

2021 ◽  
Vol 21 (No 1) ◽  
Author(s):  
C. Praveen Sampath Kumar ◽  
T. Tamil Mathi ◽  
J.L. Josh ◽  
Darling B. Suji ◽  
Ajish Muraleedharan
Keyword(s):  
Plant Breeding ◽  
Combining Ability ◽  
Diallel Analysis ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Flowering Plant ◽  
Fruit Length ◽  
Component Traits ◽  
Additive Gene ◽  
Half Diallel

The present investigation was undertaken to evaluate six parents and fifteen hybrids through half-diallel mating system to study general and specific combining ability effects and genetic analysis for various yield and yield attributing characters. Six parents viz., Arka Anamika (P1), Thanvi 66 (P2), Villupuram Local (P3), Dhaanya (P4), Ankur 41 (P5) and Varsha Uphar (P6) were crossed in half-diallel fashion at the Plant Breeding Farm, Department of Genetics and Plant Breeding, Faculty of Agriculture, Annamalai University. Resulting fifteen hybrids along with their parents were evaluated for their combining ability. Observations were recorded on single plant basis. The observations were made on characters namely, days to first flowering, plant height at maturity, number of primary branches per plant, number of nodes per plant, number of fruits per plant, number of seeds per fruit, fruit length, fruit girth, single fruit weight and fruit yield per plant. In half-diallel analysis, the variance of the genotype for all the characters were highly significant indicating high genetic variability among the parents studied. The variance due to GCA was higher than the corresponding variance due to SCA for most of the characters except number of fruits per plant, fruit length and fruit girth. The combining ability variance revealed the preponderance of additive gene action for all the characters studied. The parents P1 and P6 were found as good general combiner. Based on the sca effects, the hybrid P1 x P6 considered as the best followed by crosses P2 x P4 and P3 x P4 considered as the better hybrids.

scholarly journals Combining ability analysis in bitter gourd (Momordica charantia L.) for potential quality improvement

2024 ◽  
Vol 84 ◽  
Author(s):  
B. C. Kundu ◽  
G. M. Mohsin ◽  
M. S. Rahman ◽  
F. Ahamed ◽  
A. K. Mahato ◽  
...  
Keyword(s):  
Combining Ability ◽  
Diallel Analysis ◽  
Female Flower ◽  
Fruit Weight ◽  
Bitter Gourd ◽  
Reciprocal Effect ◽  
Gene Effects ◽  
Node Number ◽  
Combining Ability Analysis ◽  
Additive Gene

Abstract Combining ability analysis provides useful information for the selection of parents, also information regarding the nature and magnitude of involved gene actions. Crops improvement involves strategies for enhancing yield potentiality and quality components. Targeting the improvement of respective characters in bitter gourd, combining ability and genetic parameters for 19 characters were estimated from a 6×6 full diallel analysis technique. The results revealed that the variances due to general combining ability (GCA) and specific combining ability (SCA) were highly significant for most of the important characters. It indicated the importance of both additive and non-additive gene actions. GCA variances were higher in magnitude than SCA variances for all the characters studied indicating the predominance of the additive gene effects in their inheritance. The parent P2 (BG 009) appeared as the best general combiner for earliness; P1 (BG 006) for number of fruits, average single fruit weight and fruit yield; P4 (BG 027) for node number of first female flower and days to seed fruit maturity; P3 (BG 011) for fruit length and thickness of the fruit flesh; P5 (BG 033) for 100-seed weight; and P6 for number of nodes per main vine. The SCA effect as well as reciprocal effect was also significant for most of the important characters in different crosses.

scholarly journals Genetic parameters and combining ability of some important traits in rice (Oryza sativa L.)

Genetika ◽  
2017 ◽  
Vol 49 (3) ◽  
pp. 1001-1014 ◽  
Author(s):  
Hasanalideh Haghighi ◽  
Ezatollah Farshadfar ◽  
Mehrzad Allahgholipour
Keyword(s):  
Combining Ability ◽  
Genetic Parameters ◽  
Amylose Content ◽  
Oryza Sativa L ◽  
Block Design ◽  
Regression Line ◽  
Diallel Cross ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
F2 Generation

In order to study the combining ability, genetic parameters and gene actions of yield, yield components and quality characters in rice, fifteen F2 generation of a 6?6 diallel cross, excluding reciprocals, was grown in a randomized complete block design (RCBD) with three replications. The results of analysis of variance showed significant differences between the genotypes for grain yield (GY), 100-grain weight (HGW), number of panicles per plant (PN), panicle length (PL), number of full grains per panicle (FGN) and for quality characters including amylose content (AC) and gel consistency (GC). The results of combining ability analysis revealed that general combining ability (GCA) and specific combining ability (SCA) were significant for characters GY, FGN, GC, AC, HGW and PN indicating the involvement of additive and non-additive effects in their inheritance, however high amounts of Bakers ratio remarked that additive gene effect had more portion in controlling these traits. The best combiners for GY, HGW, FGN, PN and PL, were RI18447-2, IR 50, Daylamani, RI18430-46 and Daylamani respectively. For AC and GC, the best combiner was Daylamani. Hayman's graphs showed that regression line passed below the origin cutting Wr axis in the negative region for HGW, PN, PL and GC, indicating the presence of over dominance. Estimates of genetic parameters showed significant amount of H1 and H2, and non-significant amount of D for the characters GY, PN, PL and GC, which confirmed the existence of dominance in the inheritance of these traits.

scholarly journals ОЦІНКА КОМБІНАЦІЙНОЇ ЗДАТНОСТІ СОРТІВ ЯЧМЕНЮЯРОГО ЗА КІЛЬКІСНИМИ ОЗНАКАМИ В УМОВАХ ПІВНІЧНОГО СТЕПУ УКРАЇНИ

2014 ◽  
pp. 23-25
Author(s):  
В. В. Ващенко ◽  
О. О. Шевченко
Keyword(s):  
Plant Height ◽  
Combining Ability ◽  
Diallel Analysis ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Grain Weight ◽  
1000 Grain Weight

У системі діалельних схрещувань п’яти сортів яч-меню ярого (Донецький 12, Донецький 14, Донецький 15,Прерія, Галактик) установлено особливості генети-чного контролю мінливості ознак: висота рослин,кількість зерен у колосі, маса 1000 зерен у відповід-ності зі співвідношенням варіанс специфічної комбі-наційної здатності (СКЗ) і загальної комбінаційноїздатності (ЗКЗ). Виділено й запропоновано сорти якджерела ознак висота рослин Галактик і Донецький14; кількість зерен у колосі – сорт Прерія; маса 1000зерен – сорт Донецький 15. Виділені зразки з високимі стабільним рівнем комбінаційної здатності запро-поновано використовувати в селекційній роботі. A total of diallel analysis varieties of springbarley Donetskiy 12, Donetskiy 14, Donetskiy 15,Prairie, Galactic set features genetic controlvariability characteristics: plant height, number ofgrains per ear, 1000 grain weight in accordance withthe ratio of variance of specific combining ability(SSI) and general combining ability (ZKZ).Identified and proposed as a source of variety traitsplant height and Donetsk 14, Galactic, the numberof grains per ear sort Prairie, weight of 1000 grainsDonetskiy 15. Samples of high and stable levels ofcombining ability is proposed to use in breedingwork have beeen celected.

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