Agronomic characterization and heterosis in watermelon genotypes

Nascimento, T. L. do; Souza, F. de F.; Dias, R. de C. S.; Silva, Edson Ferreira da

doi:10.1590/1983-40632018v4851779

Cited by 7 publications

(6 citation statements)

References 11 publications

(9 reference statements)

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“…Only the yield character showed a high CV value Tavares et al (2018),. when evaluating this same character in watermelon genotypes, obtained a CV higher than 20%, and a similar result was obtained byNascimento et al (2018). These results show that because it is a polygenic trait and with a strong environmental influence, this value can be of the traits evaluated.…”

supporting

confidence: 81%

“…However, the main cultivars commercialized in the country were developed from 'Crimson Sweet', a genotype with fruit mass greater than 10 kg (Nascimento et al, 2018), which provides consumers with fewer options for choice. This demand can be met with the development of new commercial genotypes in breeding programs, using the genetic diversity of local varieties and Germplasm Active Banks (GABs).…”

Section: Introductionmentioning

confidence: 99%

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Watermelon general and specific combining ability

et al. 2019

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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.

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confidence: 81%

Section: Introductionmentioning

confidence: 99%

Watermelon general and specific combining ability

et al. 2019

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“…As such, crosses were carried out via controlled handpollination (CHP) according to the methods used by Nascimento et al (2018). Regarding the CHP, in the flowering stage, male and female flowers of the lineages and the F 1 hybrids were isolated at preanthesis using aluminum sachet bags.…”

Section: Obtaining the Populationsmentioning

confidence: 99%

“…To investigate seed size inheritance, seed length was measured, as this characteristic is highly correlated with width and weight (Hawkins and Dane, 2001). The lengths of 10 seeds were measured with a digital caliper (Stainless Hardened: JL-YB5474) following the method used by Nascimento et al (2018), with seeds randomly chosen from one fruit of each plant.…”

Section: Phenotypes Of Seed Size In Watermelon Populationsmentioning

confidence: 99%

Inheritance of seed size in watermelon populations

Nascimento¹,

Souza²,

Dias³

et al. 2020

Rev. Colomb. Cienc. Hortic.

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Seed size is an important agronomic trait and is applicable to different abilities. Small seeds guarantee the greater use of the pulp, while larger seeds facilitate sowing. However, there is little work on the genetic control of this characteristic in watermelon. The objective of this work was to study the seed size inheritance in watermelon populations by crossing contrasting genotypes, seeking to gain information to provide technical support during the selection of seed size for the development of new watermelon genotypes. The seed lengths of six populations, P1, P2, F1, F2, BC1 and BC2, were measured using the GENES software segregating and nonsegregating generations procedure. This trait is controlled by two genes with incomplete dominance. In addition, depending on the populations studied, inheritance for the characteristic in question may behave differently. Nevertheless, the selection of superior individuals within populations can be performed based on this phenotype, which allows the exploitation of these individuals within breeding programs to develop lines or hybrids.

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“…et Nakai) является однои� из наиболее экономически важных мировых продовольственных культур (Wijesinghe et al, 2020). Гетерозис у арбуза может проявляться по урожаи� ности, массе плода и содержанию сухих растворимых веществ (Bansal et al, 2002;Do Nascimento et al, 2018). Однако создание гетерозисных гибридов арбуза затруднено в связи с трудностью получения стерильных родительских форм (Zhang, 2012).…”

Section: Introductionunclassified

Characteristics of interline table watermelon F<sub>1</sub> hybrids according to the degrees of dominance and indices of true and hypothetical heterosis

Варивода

Байбакова

2022

Trudy po prikladnoy botanike, genetike i selektsii

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Background. Heterosis is one of the most important and promising plant breeding trends. Its development will make it possible to obtain hybrids with high adaptability and a high heterosis effect in their quantitative and qualitative characteristics.Materials and methods. The studies were carried out under dry conditions of the Volgograd Trans-Volga region in 2019–2020. Heterotic hybrids of table watermelon served as the research material, and hybridization and inbreeding as research methods. The heterotic F1 hybrid of watermelon Barkhan was used as the reference.Results. The characteristics of heterotic watermelon hybrids were compared with the parental forms and the Barkhan F1 reference. The length of the growing season in heterotic hybrids was inherited intermediately. In the average fruit weight, the reference was exceeded by the hybrids ChmsMt and ChmsFt by 1.1 kg. The highest average yield for the two years of research was observed in the F1 hybrids ChmsNts (24.3 t/ha), ChmsFt (24.1) and ChmsMt (23.1) (reference: 20.8 t/ha). The inheritance of fruit weight according to the principle of overdominance occurred in the F1 hybrids ChmsMk, ChmsRn, ChmsNts and ChmsMt. In their fruit weight, the same hybrids showed positive indices of hypothetical and true heterosis. The F1 hybrids ChmsFt, ChmsNts and ChmsIR demonstrated high degrees of dominance in yield (1.8 to 5.0%). The index of hypothetical heterosis had positive results in all studied heterotic watermelon hybrids. Negative true heterosis (–0.49%) was observed in two F1 hybrids, ChmsRn and ChmsPH. The remaining watermelon hybrids had positive true heterosis indices that ranged from 2.4% in ChmsIR to 11.06% in ChmsFt.Conclusion. As a result of the studies, heterotic hybrids of watermelon, developed on the basis of the sterile mother line Chms, were identified for high indices of true and hypothetical heterosis in fruit weight and yield parameters.

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Agronomic characterization and heterosis in watermelon genotypes

Cited by 7 publications

References 11 publications

Watermelon general and specific combining ability

Watermelon general and specific combining ability

Inheritance of seed size in watermelon populations

Characteristics of interline table watermelon F<sub>1</sub> hybrids according to the degrees of dominance and indices of true and hypothetical heterosis

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