Line × Tester Analysis for Morphological and Fruit Biochemical Traits in Eggplant (Solanum melongena L.) Using Wild Relatives as Testers

Wild relatives of eggplant are commonly exploited for eggplant improvement, but the genetic improvement relies on the information of the genetic basis of inheritance of traits. In this study, two eggplant lines, one with oriental and another with occidental cytoplasm, were crossed with four testers representing three wild species, namely, Solanum insanum, S.anguivi, and S. lichtensteinii. The Line × Tester cross produced a total of eight interspecific hybrids. Parents and their hybrids were evaluated for 3 biochemical, 12 morphological, and 8 Tomato Analyzer-based descriptors. A significant amount of variation was noticed for all 23 traits studied. The higher values for the specific combining ability (SCA) component were determined as compared to the general combining ability (GCA) component. The testers were more significant for most of the traits than the cultivated varieties. Positive heterosis was determined for the 12 characteristics and negative heterosis for the 11 attributes. Overall, S.anguivi, and S. lichtensteinii were better for the biochemical traits’ improvement, whereas S. insanum was a better tester for the morphological traits.

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

Plants ◽

10.3390/plants9010001 ◽

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.

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Quantitative Genetic Analysis of Fruit Quality in Pear

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.115.5.829 ◽

1990 ◽

Vol 115 (5) ◽

pp. 829-834 ◽

Cited By ~ 13

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.

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Evaluating General Combining Ability for Multiple Traits in Tetraploid Bahiagrass

10.21203/rs.3.rs-265840/v1 ◽

2021 ◽

Author(s):

Florencia Marcón ◽

Elsa Andrea Brugnoli ◽

José A. Rodrigues Nunes ◽

Valeria A. Gutierrez ◽

Eric J. Martínez ◽

...

Keyword(s):

Combining Ability ◽

Morphological Traits ◽

Recurrent Selection ◽

Mixed Model ◽

Selection Index ◽

General Combining Ability ◽

Hybrid Vigor ◽

Mixed Model Approach ◽

Biplot Analysis ◽

Model Approach

Abstract Recurrent selection based on combining ability has been successfully used in tetraploid bahiagrass (Paspalum notatum Flüggé) to accumulate heterotic effects and exploit hybrid vigor. However, its efficiency depends on an accurate selection of the best genotypes to form a new recombinant population. The objective of this work was to assess the general combining ability of female parents of bahiagrass based on the performance of their progeny for agronomic and morphological traits using a mixed model approach, biplot analysis and selection index. There were evaluated 29 half-sib families generated by crossing 29 sexual tetraploid genotypes from a sexual synthetic tetraploid population and a group of apomictic tetraploid genotypes. Agronomic and morphological traits were analyzed using a mixed model approach (BLUP). The multi-trait analysis was based on a biplot analysis and a selection index using the family BLUPs. BLUP analysis showed significant differences among families for most of the evaluated traits. Sexual female parents of families 5, 9, 8, 28, 21 and 16 were identified as those with greater general combining ability. Biplot showed variability among families and allowed identifying six sexual parents with greater general combining ability. The same sexual parents that exhibited greater general combining ability by BLUP were identified with greater general combining ability by biplot. Selection index was variable and allowed identifying the same best sexual parents that BLUP and biplot. The three analysis methods were equally effective to estimate general combining ability of a group of sexual parents of tetraploid bahiagrass based on the performance of their progeny.

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Genetic analysis of four main flavonoids in barley grain

Bangladesh Journal of Botany ◽

10.3329/bjb.v48i2.47498 ◽

2019 ◽

Vol 48 (2) ◽

pp. 231-237

Author(s):

Tao Yang ◽

Yawen Zeng ◽

Juan Du ◽

Shuming Yang ◽

Xiaoying Pu

Keyword(s):

Genetic Analysis ◽

Combining Ability ◽

Interspecific Hybrids ◽

Barley Grain ◽

General Combining Ability ◽

Specific Combining Ability ◽

Barley Breeding ◽

Hybrid Combination ◽

Half Diallel

Genetic analysis of 4 major flavonoids in barley interspecific hybrids which were used as parents for half diallel crossingwas carried out. Compared with seven parents, the highest general combining ability of catechin content was Clipper barley, the higest general combining ability (GCA) of myricetin content were Schooner barley and Huangchangguang barley, the highest general combining ability of quercetin content were Ziguangmang barley and Kuanying barley, the highest general combining ability of kaempferol content were Ziguangmang barley and Schooner barley, the highest general combining ability of flavonoids are Schooner barley and Huangchangguang barley. The hybrid combination of a good matching were Clipper barley, Schooner barley, Ziguangmang barley and Kuanying barley, as a comprehensive general combining ability, specific combining ability, and combinations of which can be used as flavonoids in barley breeding.

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Association of Heterotic Groups with Morphological Relationships and General Combining Ability in Eggplant

Agriculture ◽

10.3390/agriculture10060203 ◽

2020 ◽

Vol 10 (6) ◽

pp. 203

Author(s):

Hatice Filiz Boyaci ◽

Jaime Prohens ◽

Abdullah Unlu ◽

Emine Gumrukcu ◽

Mehmet Oten ◽

...

Keyword(s):

Combining Ability ◽

Solanum Melongena ◽

Inbred Lines ◽

General Combining Ability ◽

Morphological Descriptors ◽

Heterotic Groups ◽

Diallel Mating Design ◽

Multivariate Cluster ◽

Half Diallel ◽

Improved Characteristics

The identification of heterotic groups may provide an important advantage for hybrid eggplant (Solanum melongena) breeding. In this study, we evaluated the combining ability and heterotic patterns of eggplant lines in order to develop improved eggplant cultivars resistant to Fusarium oxysporum f. sp. melongenae (FOM). A set of 62 inbred lines was evaluated with 32 morphological descriptors and their relationships were analyzed through a multivariate cluster analysis. A subset of 39 inbred lines was selected and, together with 15 sister lines, they were crossed with two testers to investigate their general combining ability (GCA) and to establish heterotic groups. Twenty selected inbred lines with high GCA were intercrossed using a half-diallel mating design. Eighty-two hybrids were obtained and evaluated for yield and yield components. We found no association between morphological distance and membership to specific heterotic groups. However, heterosis for yield was found in hybrids among parents from different heterotic groups or that were included in all heterotic groups. Among the hybrids evaluated, some were found to be highly productive and resistant to FOM, being candidates for the registration of new cultivars with dramatically improved characteristics.

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Studies on Combining Ability in Eggplant (Solanum melongena L.) for Yield and Its Component

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i1330678 ◽

2020 ◽

pp. 38-46

Author(s):

. Pramila ◽

M. L. Kushwaha ◽

Udit Kumar ◽

Ramesh Kumar Gupta ◽

Bishwa Mitra Sinha

Keyword(s):

Combining Ability ◽

Block Design ◽

Total Yield ◽

Winter Season ◽

Solanum Melongena ◽

General Combining Ability ◽

Research Centre ◽

Plant Weight ◽

Randomized Block Design ◽

Fruit Diameter

Present investigation was carried out during autumn winter season 2013-14 and 2014-15 at the Vegetable Research Centre of GBPUA&T, Pantnagar with 43 genotypes including 10 lines, 3 testers and 30 F1’s of brinjal. The experiment was laid out in Randomized Block Design with three replications. The observations were recorded for 11 characters. Variances due to testers were greater than variances due to lines for most of the characters. The estimates of General Combining Ability (GCA) effect indicated that PB71, BB85, PB66, Swarn Syamli and DBL02 were best general combiner for earliness (days to 50% flowering), whereas the best specific cross was BRLVAR6 × DBL02. For weight of marketable fruits per plant PB66, SMB115, LC7, BRLVAR6 were best general combiners and SMB115 × DBL02, PB66 × Pant Samrat and IBWL 2001-1 × Pant Rituraj were best specific combiners. Pant Rituraj was found best general combining effect for plant height, fruit diameter, weight of marketable fruits per plant, number of unmarketable fruits per plant, total yield per plant and total yield per hectare. Pant Samrat showed good General Combining Ability (GCA) effects for number of primary branches per plant, number of marketable fruits per plant, weight of unmarketable fruits per plant and total number of fruits per plant. DBL02 was recorded best general combiner for earliness and fruit length. SMB115 and PB 66 were best general combiners for most of the yield characters. SMB115 × DBL02, PB66 × Pant Samrat and IBWL2001-1 × Pant Rituraj were showed highest Specific Combining Ability (SCA) effect for most of the characters. Therefore, these cross combinations could be commercially exploited for higher yield.

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Combining Ability Analysis of Juvenile Period in Pear

HortScience ◽

10.21273/hortsci.25.11.1425 ◽

1990 ◽

Vol 25 (11) ◽

pp. 1425-1427 ◽

Cited By ~ 7

Author(s):

Richard L. Bell ◽

Richard H. Zimmerman

Keyword(s):

Genetic Control ◽

Combining Ability ◽

Interspecific Hybrids ◽

Breeding Population ◽

General Combining Ability ◽

Specific Combining Ability ◽

Juvenile Period ◽

Combining Ability Analysis ◽

Period Duration ◽

Selection Of

Combining ability for transmission of juvenile period duration was studied in a large pear breeding population. The 92 parents, consisting of cultivars and selections of Pyrus communis L. and its interspecific hybrids with P. pyrifolia (Burm.) Nakai and P. ussuriensis Maxim., as well as genotypes of P. calleryana Decne., were crossed in 298 combinations. General combining ability was highly significant and of much larger magnitude than specific combining ability, indicating that juvenile period length was under predominantly additive genetic control. Selection of parents based on their juvenile period or their combining ability constants is likely to result in significant reduction in mean juvenile period.

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Development of Interspecific Hybrids between a Cultivated Eggplant Resistant to Bacterial Wilt (Ralstonia solanacearum) and Eggplant Wild Relatives for the Development of Rootstocks

Plants ◽

10.3390/plants9101405 ◽

2020 ◽

Vol 9 (10) ◽

pp. 1405

Author(s):

Mohamed Rakha ◽

Ahmed Namisy ◽

Jaw-Rong Chen ◽

Mohammed E. El-Mahrouk ◽

Elmahdy Metwally ◽

...

Keyword(s):

Bacterial Wilt ◽

Interspecific Hybrid ◽

Interspecific Hybrids ◽

Embryo Rescue ◽

Solanum Melongena ◽

Wild Relatives ◽

Interspecific Crosses ◽

Viable Seeds ◽

Wild Accessions ◽

Moderately Resistant

Bacterial wilt caused by Ralstonia solanacerum is one of the most economically and destructive eggplant diseases in many tropical and subtropical areas of the world. The objectives of this study were to develop interspecific hybrids, as potential rootstocks, between the eggplant (Solanum melongena) bacterial wilt resistant line EG203 and four wild accessions (S. incanum UPV1, S. insanum UPV2, S.anguivi UPV3, and S. sisymbriifolium UPV4), and to evaluate interspecific hybrids along with parents for resistance to bacterial wilt strains Pss97 and Pss2016. EG203 was crossed successfully with wild accessions UPV2 and UPV3 and produced viable seeds that germinated when wild accessions were used as a maternal parent in the crosses. In addition, viable interspecific hybrids between EG203 and UPV1 were obtained in both directions of the hybridization, although embryo rescue had to be used. Hybridity was confirmed in the four developed interspecific hybrid combinations with three SSR markers. EG203 was resistant to both strains Pss97 and Pss2016, while UPV1 and UPV3 were, respectively, resistant and moderately resistant to Pss2016. The four interspecific hybrids with UPV2, UPV3, and UPV1 were susceptible to both bacterial wilt strains, indicating that the resistance of EG203, UPV1, and UPV3 behaves as recessive in interspecific crosses. However, given the vigor of interspecific hybrids between eggplant and the three cultivated wild species, these hybrids may be of interest as rootstocks. However, the development of interspecific hybrid rootstocks resistant to bacterial wilt will probably require the identification of new sources of dominant resistance to this pathogen in the eggplant wild relatives.

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