Combining ability and heritability of some tomato (Solanum lycopersicum L.) cultivars

El-Gabry, M.A.H.; Solieman, T.I.H.; Abido, Ali Ibrahim

doi:10.1016/j.scienta.2014.01.010

Cited by 31 publications

(28 citation statements)

References 7 publications

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“…These results indicated that additive effects were the most important on the yield expression. In contrast to our results, El-Gabrya et al (2014) and Sanghera and Hussain (2012) found that the non-additive effects played a major role on the yield expression on other elite lines.…”

Section: Genetic Structure Of Hybrids For Yieldcontrasting

confidence: 99%

“…In plant breeding, the introduction of exotic germplasm has played an important role for obtaining new hybrids with one novel trait; e.g, pest resistance, salt stress tolerance and increased yield (Cox et al, 1984;Hanson et al, 2000;Frary et al, 2011;Lange et al, 2011;Yang et al, 2012;Gaikwad et al, 2014;Rubio et al, 2016). In tomato, many studies have classified several lines on the basis of their combing ability (Gul et al, 2010;Chattopadhyay et al, 2011;El-Gabrya et al, 2014). Unfortunately, no heterotic pattern has been reported in tomato lines derived from Mexican tomato landraces.…”

Section: General and Specific Combining Ability Effectsmentioning

confidence: 99%

“…In contrast, where heritability is low, the method of selection based on families and a low selection intensity are more effective (Acquaah, 2007). In tomato, the heritability of yield has been widely studied (Wessel-Beaver and Scott, 1992;Khanom et al, 2008;Gaspar-Peralta et al, 2012;El-Gabrya et al, 2014). In previous studies, the yield is reported as a quantitative trait with low heritability, which indicates that the major proportion of observed phenotypic variability into a population is due to environmental effects and a less proportion to additive effects (variation that is inherited).…”

Section: Genetic Structure Of Hybrids For Yieldmentioning

confidence: 99%

“…Mexico is considered as part of Mesoamerica, thus a broad range of genetic variation regarding fruit colors, shapes and sizes is observed in several Mexican regions (Bonilla-Barrientos et al, 2014). In tomato, various experiments have examined the combining ability of lines from different countries (El-Gabrya et al, 2014;Kumar et al, 2013;Andrade et al, 2014;Kalloo et al, 1974;Govindarasu et al, 1981); however, the exploration of genetic potential in Mexican landraces by GCA and SCA estimations has been limited. Using molecular markers, Sim et al (2011) studied the genetic structure of 70 landraces including 28 processing varieties, 19 fresh-market varieties, 19 vintage varieties and 4 Latin American landraces.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Exploring the breeding potential of Mexican tomato landraces

Martínez-Vázquez

Hernández-Bautista

Lobato-Ortíz

et al. 2017

Scientia Horticulturae

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Section: Genetic Structure Of Hybrids For Yieldcontrasting

confidence: 99%

Section: General and Specific Combining Ability Effectsmentioning

confidence: 99%

Section: Genetic Structure Of Hybrids For Yieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exploring the breeding potential of Mexican tomato landraces

Martínez-Vázquez

Hernández-Bautista

Lobato-Ortíz

et al. 2017

Scientia Horticulturae

View full text Add to dashboard Cite

“…[34][35][36][37] Upon examining the off spring of the populations involved in these studies, it was found that SCA effects can be detected via crossing genetically distinct genotypes and geographically distant population. 36 However, most workers have reported greater relative importance of nonadditive genetic effects than additive genetic effects for grain yield in maize, 23 rice, 38,40 sorghum, [44][45] sunflower, 32 rye, 46 tomato, 50 and linseed. 52 For example, in a study by Dehghanpour & Ehdaie, 14 SCA effects were considered for more than 74% of the sum of squares among the hybrids.…”

Section: Combining Ability For Yieldmentioning

confidence: 99%

Untitled

2016

BBIJ

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In any hybridization program, recognition of the best combination of two (or more) parental genotypes to maximize variance within related breeding populations, and as a result the chance of recognizing superior transgressive segregants in the segregating populations, are the most critical challenge to plant breeders. Since the combining ability was introduced in 1942, it has been widely adopted in plant breeding to compare performances of lines in hybrid combinations. In addition, the ability to predict optimal genotype combinations for different traits based on molecular-based genetic data would greatly enhance the efficiency of plant breeding programmes. This article reviews our current understanding of combining ability in plant breeding as well as recent advances in research in this field. It brings an introduction to combining ability and the concept of general and specific combining ability, methods for estimating combining ability, and QTL mapping of related traits.

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Variation of morphological descriptors for the evaluation of tomato germplasm and their stability across different growing conditions

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Prohens

Casanova

et al. 2018

Scientia Horticulturae

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Germplasm and breeding materials are usually characterized using morphological and agronomic descriptors, which should have a high heritability. Despite the widespread use of tomato (Solanum lycopersicum) standardized descriptors, little information exists on environmental effects on descriptor values and their heritability. We have evaluated 12 tomato accessions from seven cultivar groups in three different environments (openfield conventional, open-field organic, and greenhouse) and characterized them with 36 descriptors. A wide range of variation was found for most descriptors, demonstrating their utility for describing tomato materials and their diversity and relationships. The analysis of descriptors variation reveals that while for some descriptors with a simple genetic control the accession effect accounts for 100% of the variation, for others like yield per plant only 10.83% of the variation observed is due to the accession effect. Although significant differences were found among environments for most descriptors, including a much higher yield in the open-field conventional environment than in the two others, the environmental effect was low for most traits. However, the genotype × environment effect generally had an important contribution to the structure of variation for many descriptors, and for three traits it had the highest contribution to the percentage of the sum of squares. As a result of the variation structure, the heritability values are high (>0.7) for only 10 descriptors, while for five is low (<0.3). Principal components analysis (PCA) reveals that projections in the PCA graph of a same accession grown in different environments plot together in the same area of the PCA graph. Although cultivar groups are generally clearly separated in the PCA graph, 2 accessions from the same cultivar group in some cases are intermixed. These results have important implications for detecting tomato duplicates and establishing core collections, as well as for analyzing germplasm and breeding results, when using data sets containing data of accessions grown in different environments.

show abstract

Combining ability and heritability of some tomato (Solanum lycopersicum L.) cultivars

Cited by 31 publications

References 7 publications

Exploring the breeding potential of Mexican tomato landraces

Exploring the breeding potential of Mexican tomato landraces

Untitled

Variation of morphological descriptors for the evaluation of tomato germplasm and their stability across different growing conditions

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