Comparison between diploid and tetraploid citrus rootstocks: morphological characterization and growth evaluation

Guerra, Divanilde; Wittmann, Maria Teresa Schifino; Schwarz, Sérgio Francisco; Souza, Paulo Vítor Dutra de; Gonzatto, Mateus Pereira; Weiler, Roberto Luis

doi:10.1590/brag.2014.007

Cited by 20 publications

(12 citation statements)

References 18 publications

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“…This result suggests that thick leaves are related to the increase of the enzymes and cellular pigments, accentuating the color of the leaves. Therefore, this phenomenon can be the primary factor for a more intense color verified in the leaves of the tetraploid plant [14,21]. These parameters were also reported in other species, with artificial polyploidization, such as Musa spp.…”

Section: Resultssupporting

confidence: 62%

Chromosome doubling in Cattleya tigrina A. Rich

et al. 2019

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Chromosome doubling induction in orchids may benefit their production for resulting in flowers of higher commercial value, larger size and higher content of substances that intensify the color and fragrance when compared with diploid orchids. This work aimed to induce and confirm artificial polyploidization, using flow cytometry and stomatal analysis. Explants were treated with colchicine at concentrations of 0, 2.5, 7.5, and 12.5 mM, for 24 and 48 hours and with oryzalin, at concentrations of 0, 10, 30, and 50 μM, for three and six days. For the flow cytometric analysis, a sample of leaf tissue was removed from each plant, crushed to release the nuclei and stained with propidium iodide. In addition to flow cytometry, the ploidy of the antimitotic treated plants was evaluated by stomata analysis. Young leaves were used where the density, functionality and stomatal index were evaluated. Colchicine provided induction of satisfactory polyploidy in C. tigrina at all concentrations and times of exposure, obtaining a greater number of polyploid individuals in the concentration of 12.5 mM for 48 hours. Oryzalin did not induce chromosome duplication at the tested concentrations.

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Section: Resultssupporting

confidence: 62%

Chromosome doubling in Cattleya tigrina A. Rich

et al. 2019

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“…The results suggest that artificial genome doubling of diploid apple genotypes decreased plant vigour. Although polyploidization in plants is often associated with increased vigour, e.g., triploid apples (Sedysheva, Gorbacheva 2013) and hexaploid Hibiscus (Van Laere et al 2006, artificial genome doubling is very frequently associated with a decreased growth rate, e.g., in Citrus (Allario et al 2011;Guerra et al 2014), Spathiphyllum (Van Laere et al 2011, Platanus (Liu et al (Stupar et al 2007), and tetraploid Zea mays (Riddle et al 2006). Several observations show the increased vigour of triploid apple cultivars (Sedysheva, Gorbacheva 2013) and triploid Zea mays (Riddle et al 2006) over diploids but decreased vigour of higher ploidy levels and own observations of an increased vigour in tetraploid azalea; however, decreased vigour of hexaploids compared to diploids (Eeckhaut et al 2006) suggests that plant species potentially possess an optimal ploidy degree, below or above which its growth will be reduced.…”

Section: Discussionmentioning

confidence: 99%

Effect of polyploidization on morphology in two apple (Malus × domestica) genotypes

Hias¹,

Leus²,

Davey³

et al. 2017

Hort. Sci. (Prague)

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Hias N., Leus L., Davey M.W., Vanderzande S., Van Huylenbroeck J., Keulemans J. (2017): Effect of polyploidization on morphology in two apple (Malus × domestica) genotypes. Hort. Sci. (Prague), 44: 55-63.Because polyploidy often results in enhancement of desirable properties, artificial genome doubling is commonly used in agri-and horticultural crop breeding programs. In this study genome doubling was induced in two apple genotypes. The effect on vegetative morphological and physiological traits of the plants was then comprehensively determined by comparing the obtained tetraploid apple plants with their diploid counterparts. Out of 17 different physio-and morphological characteristics, 15 were significantly affected in one or both genotypes. The response of these 15 characteristics also appeared to have been caused by two effects; 10 of the 15 characteristics exhibited a common response to ploidy change over both genotypes while five traits showed a genotype-specific response to polyploidization. Tetraploid leaves also exhibited a darker leaf colour, which could be correlated to a higher pigment concentration. Furthermore, the results also show a decreased elongation rate and leaf size in tetraploids, which is suggested to be due to the observed lower cell density in the polyploid apple plants.

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“…Basically, polyploids differ from the diploid counterparts in their ecological, morphological, and physiological characteristics (Dewitte et al 2009;Guerra et al 2014; Communicated by Carlos F. Quiros.…”

Section: Introductionmentioning

confidence: 99%

Male and female inheritance patterns in tetraploid ‘Moncada’ mandarin

et al. 2019

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Key message Tetraploid `Moncada´ mandarin, used as male and female in interploidy hybridizations, displays mainly tetrasomic inheritance for most LGs, with slight variations according to the direction of the crossing. Abstract Triploid-breeding programs in citrus are key tool to develop seedless cultivars. Obtaining triploid citrus hybrids may be achieved through different strategies, such as the exploitation of female unreduced gamete in crosses between diploid parents and diploid by tetraploid sexual hybridizations, in which tetraploid genotypes can be used as male or female parents. Genetic configuration of triploid populations from interploid crosses greatly depends on the chromosomic segregation mode of the tetraploid parent used. Here, we have analyzed the inheritance of the tetraploid 'Moncada' mandarin and compared the genetic structures of the resulting gametes when used as male and as female parent. The preferential chromosome pairing rate is calculated from the parental heterozygosity restitution (PHR) of codominant molecular markers, indicating the proportion between disomic and tetrasomic segregation. Tetraploid 'Moncada' both as female and male parent largely exhibited tetrasomic segregation. However, as female parent, one linkage group (LG8) showed intermediate segregation with tendency towards tetrasomic inheritance, while another linkage group (LG4) evidenced a clear intermediate segregation. On the other hand, when used as male parent two linkage groups (LG5 and LG6) showed values that fit an intermediate inheritance model with tetrasomic tendency. Significant doubled reduction (DR) rates were observed in five linkage groups as female parent, and in six linkage groups as male parent. The new knowledge generated here will serve to define crossing strategies in citrus improvement programs to efficiently obtain new varieties of interest in the global fresh consumption market.

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Comparison between diploid and tetraploid citrus rootstocks: morphological characterization and growth evaluation

Cited by 20 publications

References 18 publications

Chromosome doubling in Cattleya tigrina A. Rich

Chromosome doubling in Cattleya tigrina A. Rich

Effect of polyploidization on morphology in two apple (Malus × domestica) genotypes

Male and female inheritance patterns in tetraploid ‘Moncada’ mandarin

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