Combining-ability for yield and its components in tomato

Govindarasu, P.; Muthukrishnan, C. R.; Irulappan, I.

doi:10.1016/0304-4238(81)90003-0

Cited by 11 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While little information exists on the inheritance of the number of flowers per inflorescence in eggplant [ 66 ], prickliness has been described as a monogenic or oligogenic trait, with a mostly dominant genetic control, although in some interspecific crosses it is recessive [ 43 , 49 , 66 ]. Yield displayed the lowest levels for the GCA/SCA ratio, which is in agreement with other works in eggplant [ 67 ] and in other solanaceous fruit crops like tomato [ 68 ] or pepper [ 69 ], indicating that non-additive effects and their interactions play a major role in the genetic control of this trait. This further supports the development of hybrids as an appropriate strategy for enhancing eggplant yield [ 5 , 39 ].…”

Section: Discussionsupporting

confidence: 91%

Diallel genetic analysis for multiple traits in eggplant and assessment of genetic distances for predicting hybrids performance

et al. 2018

View full text Add to dashboard Cite

Evaluation and prediction of the performance of hybrids is important in eggplant (Solanum melongena) breeding. A set of 10 morphologically highly diverse eggplant parents, including nine inbred S. melongena and one weedy S. insanum accessions, were intercrossed according to a half-diallel mating design without reciprocals to obtain 45 hybrids. Parents and hybrids were evaluated for 14 morphological and agronomic conventional descriptors and 14 fruit morphometric traits using Tomato Analyzer. Genetic distances among parents were estimated with 7,335 polymorphic SNP markers. Wide ranges of variation and significant differences were observed in the set of 55 genotypes for all traits, although the hybrids group had significantly higher vigour and yield than parents. General and specific combining abilities (GCA and SCA) were significant for most (GCA) or all (SCA) traits, although a wide variation was obtained for GCA/SCA ratios. Many relevant traits associated to vigour and yield had low GCA/SCA ratios and narrow-sense heritability (h2) values, while the reverse occurred for most fruit shape descriptors. Broad-sense heritability (H2) values were generally high, irrespective of GCA/SCA ratios. Significant correlations were found between traits related to size of leaf, flower and fruit, as well as among many fruit morphometric traits. Genetic distances (GD) among parents were coherent with their phylogenetic relationships, but few significant and generally low correlations were found between GD and hybrid means, heterosis or SCA. The results provide relevant information for developing appropriate strategies for parent selection and hybrid development in eggplant and suggest that GD among parents have limited value to predict hybrid performance in this crop.

show abstract

Section: Discussionsupporting

confidence: 91%

Diallel genetic analysis for multiple traits in eggplant and assessment of genetic distances for predicting hybrids performance

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Kaur (2000) and Dhatt et al (2001) have also reported the role of non-additive gene action in controlling dry matter and titratable acidity. The predominance of non-additive gene action in governing TSS was also reported by Kalloo et al (1974), Singh and Nandpuri (1974), Peter and Rai (1980), Govindarasu et al (1981), Swamy and Mathai (1982), Singh et al (1998), Kaur (2000), Bhatt et al (2001) and Dhatt et al (2001). In addition, Dhatt (2001) has also reported the predominant role of non-additive gene action in controlling TSS:Acid ratio.…”

Section: Gene Actionsupporting

confidence: 52%

Genetics of yield, quality and shelf life characteristics in tomato under normal and late planting conditions

2007

View full text Add to dashboard Cite

Seventy nine genotypes of tomato (15 lines, four testers and their 60 F 1 hybrids produced in line · tester fashion) were evaluated under normal (E 1 ) and late planting (E 2 ) conditions in the Department of Vegetable Crops, Punjab Agricultural University, Ludhiana, India, to determine the nature of gene action controlling yield, quality and shelf life characteristics and to identify a few good combiner genotypes which may be used in further breeding programmes to extend the fruit availability period of tomato in North Indian plains. The lines were significantly different from testers for most of the characters thereby justifying the choice of testers. Additive gene action was predominant for days to ripening, total yield per plant, marketable yield per plant, number of fruits per plant, average fruit weight, fruit shape index and lycopene in both the environments, whereas non-additive genetic variance predominated in controlling firmness index, number of locules, pericarp thickness, alcohol insoluble solids (AIS), dry matter, total soluble solids (TSS), titratable acidity, TSS:Acid ratio, pH, ascorbic acid and shelf life, under both normal and late planting conditions. The best general combining ability (gca) effects, among females, in respect of yield per plant were shown by Spectrum in E 1 and by LT-42 in E 2 . Among the testers, the best gca values in both the environments were possessed by nor-RM-1 for total yield per plant, marketable yield per plant, number of fruits per plant, dry matter and TSS; by rin-RM-2 for firmness index, pericarp thickness and alcohol insoluble solids; by alc-IIHR-2050 for average fruit weight, number of locules and shelf life and by alc-IIHR-2052 for lycopene. The gca of ripening mutants had a nice consonance with their per se performance for most of the characters indicating that additive gene action was operative in these mutants for majority of the traits.

show abstract

“…For example, additive gene action was reported to control yield and its component traits in tomato [49,50]. In contrast, non-additive gene action was reported to control many traits in tomato [51,52]. Similarly, the additive and the non-additive inheritance of biochemical traits like dry matter, lycopene and TSS were also reported [53,54].…”

Section: Variation In Parents and Hybridsmentioning

confidence: 99%

Diallel Analysis for Morphological and Biochemical Traits in Tomato Cultivated under the Influence of Tomato Leaf Curl Virus

Kaushik

Dhaliwal

2018

Agronomy

View full text Add to dashboard Cite

Eloquent information about the genetic basis of inheritance is important for any breeding program. Therefore, a diallel study was conducted under the influence of tomato leaf curl virus (TLCV) disease, using the eleven advanced lines of tomato. Firstly, information regarding percent disease index (PDI) was determined via artificial screening with viruliferous whiteflies. Later, these lines were crossed in a half diallel mating design to produce fifty-five one-way hybrids. These hybrids and parental genotypes were evaluated for morphological and biochemical traits under open field conditions. Using the Griffing approach (Method II and Model I), the basis of the inheritance of traits was determined. Furthermore, a Bayesian model was applied to the total yield descriptor. Correlation data indicated that total yield was not correlated with any other trait. The significant general combining ability (GCA) and specific combining ability (SCA) values indicate exploitable genetic variation. The broad-sense heritability values were larger than narrow-sense heritability, showing that selection will be efficient for the improvement of these traits. Hybrid combinations H23, H42 and H49 can be considered efficient for the selection of multiple traits, including yield. Overall, this study provides useful information regarding the genetics of important traits of tomato under TLCV infestation.

show abstract

Combining-ability for yield and its components in tomato

Cited by 11 publications

References 1 publication

Diallel genetic analysis for multiple traits in eggplant and assessment of genetic distances for predicting hybrids performance

Diallel genetic analysis for multiple traits in eggplant and assessment of genetic distances for predicting hybrids performance

Genetics of yield, quality and shelf life characteristics in tomato under normal and late planting conditions

Diallel Analysis for Morphological and Biochemical Traits in Tomato Cultivated under the Influence of Tomato Leaf Curl Virus

Contact Info

Product

Resources

About