Genetic analysis of tomato internode length via mixed major gene plus polygene inheritance model

Sun, Xiaorong; Liu, Lei; Zhi, Xiaona; Bai, Jinrui; Cui, Yanan; Shu, Jinshuai; Li, Junming

doi:10.1016/j.scienta.2018.11.044

Cited by 18 publications

(11 citation statements)

References 22 publications

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“…Plants with shorter internodes have been used in breeding programs for various crops, and improvements have been reported in yield and plant architecture when a dwarf parent is used ( Finzi et al, 2017 , Wu et al, 2018 , Cho et al, 2021 ). The dwarf tomato plant populations obtained in this study exhibited short internodes and could be viable alternatives for increasing the yield of future hybrid tomato plants, and thereby obtain plants with more compact architecture that will facilitate management and harvest activities ( Frasca et al, 2014 , Sun et al, 2019 ).…”

Section: Discussionmentioning

confidence: 93%

Artificial neural networks and genetic dissimilarity among saladette type dwarf tomato plant populations

Oliveira

Maciel

Siquieroli

et al. 2021

Food Chemistry: Molecular Sciences

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Section: Discussionmentioning

confidence: 93%

Artificial neural networks and genetic dissimilarity among saladette type dwarf tomato plant populations

Oliveira

Maciel

Siquieroli

et al. 2021

Food Chemistry: Molecular Sciences

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“…These were generated at the Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences. Heinz 1706 was obtained from the Tomato Genetics Resource Center and displays a normal internode length, which is significantly shorter than the mutant P502 [53].…”

Section: Methodsmentioning

confidence: 99%

“…The mean internode lengths from the first internode to the fifth internode (starting from the cotyledons) of 40-day-old seedlings were recorded for phenotypic analysis [36,53]. The bulked segregant analysis (BSA) strategy was used for the quick identification of molecular markers linked with the target locus [60].…”

Section: Methodsmentioning

confidence: 99%

Identification and Characterization of EI (Elongated Internode) Gene in Tomato (Solanum lycopersicum)

Sun

Shu

Mohamed

et al. 2019

IJMS

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Internode length is an important agronomic trait affecting plant architecture and crop yield. However, few genes for internode elongation have been identified in tomato. In this study, we characterized an elongated internode inbred line P502, which is a natural mutant of the tomato cultivar 05T606. The mutant P502 exhibits longer internode and higher bioactive GA concentration compared with wild-type 05T606. Genetic analysis suggested that the elongated internode trait is controlled by quantitative trait loci (QTL). Then, we identified a major QTL on chromosome 2 based on molecular markers and bulked segregant analysis (BSA). The locus was designated as EI (Elongated Internode), which explained 73.6% genetic variance. The EI was further mapped to a 75.8-kb region containing 10 genes in the reference Heinz 1706 genome. One single nucleotide polymorphism (SNP) in the coding region of solyc02g080120.1 was identified, which encodes gibberellin 2-beta-dioxygenase 7 (SlGA2ox7). SlGA2ox7, orthologous to AtGA2ox7 and AtGA2ox8, is involved in the regulation of GA degradation. Overexpression of the wild EI gene in mutant P502 caused a dwarf phenotype with a shortened internode. The difference of EI expression levels was not significant in the P502 and wild-type, but the expression levels of GA biosynthetic genes including CPS, KO, KAO, GA20ox1, GA20ox2, GA20ox4, GA3ox1, GA2ox1, GA2ox2, GA2ox4, and GA2ox5, were upregulated in mutant P502. Our results may provide a better understanding of the genetics underlying the internode elongation and valuable information to improve plant architecture of the tomato.

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“…Although this technology is rarely exploited in tomato (Sun et al, 2019), satisfactory results have been achieved by Finzi et al (2017), who obtained hybrids originating from a cross between two mini-tomato lines (dwarf size vs. normal size) to agronomic advantage.…”

Section: Introductionmentioning

confidence: 99%

Selection of F2RC1 saladette-type dwarf tomato plant populations for fruit quality and whitefly resistance

Oliveira

Maciel

Gomes

et al. 2022

Rev. bras. eng. agríc. ambient.

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This study aimed to select promising F2RC1 populations of saladette-type dwarf tomato plants for the development of breeding lines based on agronomic characteristics, fruit quality, and whitefly resistance. The experimental design was randomized blocks containing 13 treatments (10 F2RC1 populations of dwarf tomato plants, both parents, and a commercial hybrid) with four replicates. The evaluations were performed included weight, length, diameter, shape, pulp thickness, number of locules, soluble solids, β-carotene, and lycopene concentration of the fruit; plant internode length; acylsugars concentration; and number of whitefly eggs, nymphs, and adults on the leaflets. The data were analyzed using ANOVA, selection indices, and multivariate analysis. The first backcross increased the agronomic characteristics of the populations in relation to the donor parent, especially for fruit weight (169.1%), fruit length (26.1%), and fruit diameter (16.6%). The UFU SDi 7, UFU SDi 9, and UFU-SDi 17 populations were selected using two selection indices and were therefore considered promising.

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Genetic analysis of tomato internode length via mixed major gene plus polygene inheritance model

Cited by 18 publications

References 22 publications

Artificial neural networks and genetic dissimilarity among saladette type dwarf tomato plant populations

Artificial neural networks and genetic dissimilarity among saladette type dwarf tomato plant populations

Identification and Characterization of EI (Elongated Internode) Gene in Tomato (Solanum lycopersicum)

Selection of F2RC1 saladette-type dwarf tomato plant populations for fruit quality and whitefly resistance

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