scholarly journals Evaluation of the specific combining ability (SCA) for yield and brix of seven Cucumis melo. L inbred lines of the sixth generation

2021 ◽  
Vol 20 (02) ◽  
pp. 1-9
Author(s):  
Tuan Q. Huynh
Keyword(s):  
Combining Ability ◽  
Cucumis Melo ◽  
Block Design ◽  
Inbred Lines ◽  
Specific Combining Ability ◽  
Soluble Solids ◽  
F1 Hybrid ◽  
Sixth Generation ◽  
Cucumis Melo L ◽  
Hybrid Lines

The objective of the experiment was to screen Cucumis melo L. inbred lines for high potential general combining ability and potential hybrids combinations for F1 hybridization. The experiment was conducted as a randomized complete block design (RCBD) with 29 treatments [21 hybrid combinations, control (TL3 hybrid) and seven Cucumis melo L. inbred lines I6], each with three replicates. Estimating the specific combining ability (SCA) of Cucumis melo L. inbred lines for breeding of F1 hybrid cultivars was carried out at the Research and Development Center for Hi-tech Agriculture in Ho Chi Minh City. Based on the specific combining ability of yield trait and total soluble solids (Brix) content of 21 hybrid lines from seven inbred lines following diallel method (Griffing 4 model), four potential hybrid lines (H41.6 x H58.6, H53.6 x H77.6, H32.6 x H41.6 and H53.6 x H58.6) yielded 10% higher than the control variety and gave fruits of oval shape, even fruit-net and low diseases infection.

scholarly journals Estimation of the specific combining ability (SCA) of eight bitter gourd (Momordica charantia L.) inbred lines in the sixth generation

2021 ◽  
Vol 20 (02) ◽  
pp. 17-26
Author(s):  
Trinh T. T. To
Keyword(s):  
Combining Ability ◽  
Inbred Lines ◽  
Momordica Charantia ◽  
Specific Combining Ability ◽  
Bitter Gourd ◽  
Ho Chi Minh City ◽  
Fruit Characteristics ◽  
F1 Hybrid ◽  
Sixth Generation ◽  
Development Center

Estimating the Specific Combining Ability (SCA) of bitter gourd (Momordica charantia L.) inbred lines for breeding F1 hybrid cultivars was performed at the Research and Development Center for Hi-tech Agriculture in Ho Chi Minh City from September to December 2019. The objective of the study was to select the outstanding hybrid combinations from diallen method to produce F1 hybrid cultivars. The results from estimating the SCAs based on the productivity characteristic of 28 hybrid combinations produced from eight bitter gourd I6 inbred lines (Q16, Q65, Q80, Q86, Q75, Q06, Q81 and Q87) following diallen method showed that four promised hybrid combinations (Q65/Q80, Q86/Q75, Q06/Q81 and Q81/Q87) performed over 10% higher SCA values and heterosis than the control, and they were less susceptible to infectious diseases. Fruit characteristics and yield of four hybrid combinations included fruit length of 16.0 to 17.6 cm; fruit width of 6.2 to 6.8 cm; 132.2 to 151.7 g/fruit and average yield of 4.1 to 4.3 tons/1000 m2.

scholarly journals PRODUÇÃO DO MELOEIRO EM AMBIENTE PROTEGIDO IRRIGADO COM DIFERENTES LÂMINAS DE ÁGUA

Irriga ◽  
2006 ◽  
Vol 11 (4) ◽  
pp. 500-506 ◽  
Author(s):  
Marcio Koetz ◽  
Gilberto Coelho ◽  
Jacinto De Assunção Carvalho ◽  
Rovilson José de Souza ◽  
Renato Antonio da Silva
Keyword(s):  
Cucumis Melo ◽  
Block Design ◽  
Water Levels ◽  
Soluble Solids ◽  
Plant Production ◽  
Average Weight ◽  
Irrigation Level ◽  
Cucumis Melo L ◽  
Irrigation Levels ◽  
Fruit Diameter

PRODUÇÃO DO MELOEIRO EM AMBIENTE PROTEGIDO IRRIGADO COM DIFERENTES LÂMINAS DE ÁGUA  Marcio Koetz1; Gilberto Coelho1; Jacinto de Assunção Carvalho1; Rovilson José de Souza1; Renato Antonio da Silva21Departamento de Engenharia,Universidade Federal de Lavras, Lavras,  MG, [email protected] de Agricultura,Universidade Federal de Lavras, Lavras,  MG  1 RESUMO          Com o objetivo de avaliar o efeito de lâminas de irrigação e de freqüências de adubação sobre a produtividade total, diâmetro, comprimento e a massa média de frutos de melão, foi conduzido um experimento em blocos casualizados com parcelas subdivididas sendo nas parcelas quatro lâminas de irrigação (50, 75, 100 e 125 % da evaporação do TCA) e quatro freqüências de adubação de 14/10/2003 a 29/01/2004. Os sólidos solúveis totais (SST) obtiveram melhores resultados para uma lâmina de irrigação de 75 % da ETCA. O diâmetro, comprimento e massa média do fruto, e produtividade do meloeiro, obtiveram maiores valores para a freqüência de adubação em cinco aplicações e para uma lâmina de irrigação de 125 % da ETCA, no entanto, não há diferença significativa entre as características avaliadas. UNITERMOS: irrigação, fertirrigação, melão, Cucumis melo L. var. cantaloupensis  KOETZ, M.; COELHO, G.; CARVALHO, J. de A.; SOUZA, R. J. de; SILVA, R. A. da.MELON PLANT PRODUCTION UNDER  PROTECTED IRRIGATED CONDITIONS AND DIFFERENT  WATER LEVELS  2 ABSTRACT             In order to evaluate the effect of irrigation levels and fertilization periods on the total productivity, fruit diameter, length and fruit average weight. The experiment had a  random block design with 4 irrigation levels (50, 75, 100 and 125% of the TCA evaporation) and 4 fertilization periods  from Oct. 14, 2003 to Jan. 1, 2004. The total soluble solids (SST) obtained better results for an irrigation level of 75% ETCA. The fruit diameter, length and average mass, and melon plant productivity presented higher values for fertilization periods in five applications and for an irrigation level of 125% ETCA; however, there is not significant differences among the evaluated characteristics. KEYWORDS: Irrigation, fertigation, melon, Cucumis melo L. var. cantaloupensis 

scholarly journals Daya Gabung Karakteristik Tongkol dari Galur-Galur Inbrida Jagung Manis pada Sistem Budidaya Organik

2017 ◽  
Vol 8 (1) ◽  
pp. 48
Author(s):  
Muhammad Chozin ◽  
Sigit Sudjatmiko ◽  
Nanik Setyowati ◽  
Fahrurrozi , ◽  
Zainal Muktamar
Keyword(s):  
Combining Ability ◽  
Crop Production ◽  
Sweet Corn ◽  
Block Design ◽  
Cropping System ◽  
Inbred Lines ◽  
Specific Combining Ability ◽  
Minor Role ◽  
Reciprocal Effect ◽  
Combining Abilities

<p>ABSTRACT<br />The availability of varieties having high-yielding potential and good horticultural characteristics under organic environment is prerequisite for successful organic sweet corn production. Objective of this study was to estimate the general and specific combining abilities of ear characteristics in eight sweet corn inbred lines under organic cropping system. Seeds of 64 genotypes generated from a full diallel crossing scheme of the inbred lines were planted on the experimental plots in a randomized complete block design with 3 replications. Organic managements were practiced during the crop production. Analysis of variance showed highly significant variabilities among the genotypes for ear length, unhusked ear diameter, husked ear diameter, kernel row number, and ear weight. Analyisis of combining ability components revealed that both additive and non-addive gene actions played important roles in the expression of those traits, while reciprocal effect played a minor role in husked ear diameter expression. Based on their general combining abilities, Caps 17A, Caps 17B, and Caps 5 were considered as good combiners for the development high-yielding hybrid varieties under organic cropping system. Caps 2 x Caps 3 was the hybrid with the highest and positive specific combining ability for most of the characters studied.<br />Keywords: general combining ability, hybrid, inbred line, specific combining ability</p><p>ABSTRAK<br />Penyediaan varietas yang berdaya hasil tinggi dengan karakteristik hortikultura baik pada lingkungan organik menjadi prasyarat bagi keberhasilan produksi jagung manis secara organik. Tujuan dari penelitian ini ialah untuk menduga besarnya daya gabung umum dan daya gabung khusus karakteristik tongkol dari delapan galur inbrida jagung manis pada sistem budidaya organik. Benih dari 64 genotipe yang dihasilkan melalui skema persilangan dialel penuh dari galur-galur inbrida tersebut ditanam pada plot-plot percobaan dalam susunan rancangan acak kelompok lengkap dengan 3 ulangan. Pengelolaan secara organik dilakukan selama proses budidaya tanaman. Analisis ragam menunjukkan adanya perbedaan yang sangat nyata antar genotipe untuk panjang tongkol, diameter tongkol berkelobot, diameter tongkol tanpa kelobot, jumlah baris biji per tongkol, dan bobot tongkol. Analisis daya gabung menunjukkan bahwa tindak gen aditif dan non-aditif memiliki peran penting terhadap ekspresi karakter-karakter tersebut, sementara pengaruh resiprokal hanya terlibat pada ekspresi diameter tongkol tanpa kelobot. Berdasarkan nilai daya gabung umumnya, Caps 17A, Caps 17B, dan Caps 5 memiliki potensi sebagai penggabung yang baik untuk pengembangan varietas hibrida berdaya hasil tinggi pada sistem budidaya organik. Caps 2 x Caps 3 merupakan hibrida dengan daya gabung khusus positif tertinggi pada sebagian besar karakter tongkol yang dievaluasi.<br />Kata kunci: daya gabung khusus, daya gabung umum, galur inbrida, hibrida</p>

scholarly journals Watermelon general and specific combining ability

2019 ◽  
Vol 10 (1) ◽  
pp. 132-140
Author(s):  
Tiago Lima Do Nascimento ◽  
Flávio De França Souza ◽  
Rita De Cassia Souza Dias ◽  
Edson Ferreira Da Silva
Keyword(s):  
Combining Ability ◽  
Block Design ◽  
Seed Mass ◽  
Branch Length ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Female Flower ◽  
Specific Combining Ability ◽  
Soluble Solids ◽  
Ability Estimates

The combining ability of six watermelon genotypes was estimated in a diallel cross scheme (6x6), including genotypes JNY (1), ‘ORA’ (2), ‘KOD’ (3), ‘SOL’ (4), ‘CHG’ (5), ‘PEA’ (6) and all possible hybrids between them. A randomized complete block design (RCB) was used, with 36 treatments, three blocks, and plots with five plants. The following traits were evaluated: days before female flower anthesis, main branch length, fruit mass, number of fruits per plant, yield, fruit length, fruit width, pulp firmness, soluble solids content, average rind thickness, seed length, seed width, and seed mass. The data obtained were submitted to analysis of variance, and a diallel analysis was performed according to Griffing’s experimental method I. According to the general combining ability estimates obtained, genotypes ‘KOD’ (3) and ‘JNY’ (1) were the most likely ones to produce hybrids with smaller-sized fruits and smaller seeds. The reciprocal effects confirmed that the results indicate that these genotypes should be used as pollen donors and pollen recipients, respectively. On the other hand, genotypes ‘ORA’ (2) and ‘CHG’ (5) can be used for the commercial exploitation of sliced ​​watermelons. According to the specific combining ability estimates obtained, the combinations ‘ORA’ (2) x ‘PEA’ (6), ‘ORA’ (2) x ‘JNY’ (1), ‘CHG’ (5) x ‘KOD’ (3), ‘PEA’ (6) x ‘KOD’ (3), and ‘CHG’ (5) x ‘SOL’ (4) stood out as being the genotypes most likely to produce the smallest fruits and smallest seeds.

scholarly journals Heterosis and Specific Combining Ability in Sweet Corn and Its Correlation with Genetic Similarity of Inbred Lines

2017 ◽  
Vol 9 (3) ◽  
pp. 245 ◽  
Author(s):  
Purwito Djoko Yuwono ◽  
Rudi Hari Murti ◽  
Panjisakti Basunanda
Keyword(s):  
Combining Ability ◽  
Genetic Similarity ◽  
Morphological Traits ◽  
Sweet Corn ◽  
Block Design ◽  
Inbred Lines ◽  
Specific Combining Ability ◽  
Heterotic Group ◽  
Field Corn ◽  
Corn Breeding

The heterosis phenomena has been exploited in hybrid maize field production. Theoretically, heterosis was depending on genetic distance of inbred lines. Meanwhile, different from field corn breeding, sweet corn does not have well defined heterotic group. The objective of this study was to determine genetic similarity (GS) of eight selected inbred lines of sweet corn based on morphological traits and its correlation with specific combining ability (SCA) and heterosis. The eight inbred lines were characterized and crossed in full diallel design. Then, the lines, F1 and its reciprocal, were evaluated by using the Randomized Complete Block Design in three replications. The result showed positive heterosis and SCA effect in most of the hybrids which indicated the heterosis effect in the hybrids performance. Based on the morphological traits, the genetic similarity between the inbred lines was 62.2-82.4%. The inbred lines with 70% similarity coefficient were grouped into three. There was significant correlation between the genetic similarity and heterosis in all traits, except in the plant height. Meanwhile, only SCA of days to maturity and TSS showed significant correlation to genetic similarity. This indicated the usefullness of genetic similarity to identify the potential inbred lines for parental hybrid.

scholarly journals COMBINING ABILITY AND HETEROTIC STUDIES ON HYBRID MELON (Cucumis melo L.) POPULATIONS FOR FRUIT YIELD AND QUALITY TRAITS

2020 ◽  
Author(s):  
Kaswan Badami ◽  
◽  
Budi Setiadi Daryono ◽  
Achmad Amzeri ◽  
Syaiful Khoiri ◽  
...  
Keyword(s):  
Combining Ability ◽  
Cucumis Melo ◽  
Gene Action ◽  
Fruit Weight ◽  
Soluble Solids ◽  
F1 Hybrids ◽  
Quality Traits ◽  
Yield And Quality ◽  
Cucumis Melo L ◽  
Fruit Diameter

In different crop plants, combining ability and heterosis are used as important diagnostic tools for assessing the performance of parental genotypes and their hybrids. This research aimed to evaluate heterotic and combining ability effects in the diallel crosses of melon (Cucumis melo L.) for yield- and quality-related traits. Seven melon (C. melo L.) genotypes were grown and crossed in a complete diallel fashion to produce F1 hybrids. During the 2019 crop season, 49 melon genotypes (7 parents + 42 F1 hybrids) were grown in a randomized complete block design with three replications. Observations were made for seven characters. Analysis of variance revealed significant (P ≤ 0.01) differences among the melon genotypes for harvest age, fruit flesh thickness, fruit total soluble solids, fruit length, and fruit diameter and merely significant differences (P ≤ 0.05) for fruit weight. Combining ability analysis revealed that mean squares due to general combining ability (GCA) were significant for fruit diameter but were nonsignificant for all other traits. However, mean squares due to specific combining ability (SCA) were significant for all traits. The parental genotypes PK-165, PK-464, and PK-669 exhibited the highest and desirable GCA effects for yield and quality traits. Hence, these genotypes could be used to generate high-yielding hybrid/open-pollinated cultivars. GCA:SCA ratios further revealed that the traits of harvest age, fruit flesh thickness, fruit total soluble solids, fruit length, and fruit weight were controlled by dominant gene action, whereas fruit diameter was managed by additive and dominant genes. The majority of the traits were controlled by nonadditive gene action, verifying that the said breeding material could be efficiently used for the production of hybrid cultivars on the basis of heterotic effects.

scholarly journals Diallel cross among fresh market tomato inbreeding lines

2012 ◽  
Vol 30 (2) ◽  
pp. 246-251 ◽  
Author(s):  
Lívia M de Souza ◽  
Maria Elisa AGZ Paterniani ◽  
Paulo César T de Melo ◽  
Arlete MT de Melo
Keyword(s):  
Combining Ability ◽  
Yield Components ◽  
Block Design ◽  
Diallel Cross ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Width Ratio ◽  
Parental Line ◽  
Fresh Market ◽  
Fruit Number

The general combining ability (GCA), specific combining ability (SCA), and heterosis were studied in a complete diallel cross among fresh market tomato breeding lines with reciprocal excluded. Fifteen genotypes (five parents and ten hybrids) were tested using a randomized complete block design, with three replications, and the experiments were conducted in Itatiba, São Paulo state, Brazil, in 2005/06. The yield components evaluated were fruit yield per plant (FP), fruit number per plant (FN), average fruit weight (FW); cluster number per plant (CN); fruit number per cluster (FC), fruit wall thickness (FT) and number of locules per fruit (NL). Fruit quality components evaluated were total soluble solids (SS); total titratable acidity (TA); SS/TA ratio, fruit length (FL); fruit width (WI); length to width ratio (FL/WI). The data for each trait was first subjected to analysis of variance. Griffing's method 2, model 1 was employed to estimate the general (GCA) and specific (SCA) combining abilities. Parental and hybrid data for each trait were used to estimate of mid-parent heterosis. For plant fruit yield, IAC-2 was the best parental line with the highest GCA followed by IAC-4 and IAC-1 lines. The hybrids IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-4 showed the highest effects of SCA. High heterotic responses were found for fruit yield and plant fruit number with values up to 49.72% and 47.19%, respectively. The best hybrids for fruit yield and plant fruit number were IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-5, for fruit yield and plant fruit number, the main yield components.

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 Exploring Heterosis in Melon (Cucumis melo L.)

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 282
Author(s):  
Marco Napolitano ◽  
Niccolò Terzaroli ◽  
Subash Kashyap ◽  
Luigi Russi ◽  
Elen Jones-Evans ◽  
...  
Keyword(s):  
Genetic Distance ◽  
Combining Ability ◽  
Central Italy ◽  
Genotype By Environment Interaction ◽  
Least Square ◽  
Soluble Solids ◽  
Environment Interaction ◽  
Gene Effects ◽  
F1 Hybrid ◽  
Mahalanobis Distances

Heterosis is the superiority of an F1 hybrid over its parents. Since this phenomenon is still unclear in melon, a half diallel experiment based on eight genetically distant breeding lines was conducted in six environments of Central Italy, assessing commercially important traits: yield, total soluble solids (TSS), and days to ripening (DTR). To estimate the additive (general combining ability; GCA) and the non-additive gene effects (specific combining ability; SCA), yield was analyzed by Griffing’s methods two and four, and the results were compared to the GGE (Genotype plus Genotype by Environment interaction) biplot methodology; TSS and earliness were evaluated only by Griffing’s method four. Overall, GCAs were significantly more relevant than SCAs for all examined traits. Least square means (LsM), mid-parent heterosis (MPH), best-parent heterosis (BPH), as well as Euclidean and Mahalanobis’ distances were calculated and compared with the genetic distance (GD). As a few correlations were found statistically significant (only for TSS), it was difficult to predict the value of a hybrid combination only by knowing the genetic distance of its parents. Despite this, heterosis was observed, indicating either the presence of epistatic effects (additive × additive interactions) and/or an underestimate of SCAs embedded within Griffing’s method. The significant Env × Entries source of variation suggests development of hybrids in specific environments. The results are discussed with a breeding perspective.

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