Interspecific Periclinal Chimeras as a Strategy for Cultivar Development

Nassar, Nagib A.; Fernandes, Nayra N. Bomfim; Freitas, D.Y.H.; Gradziel, Thomas M.

doi:10.1002/9781119279723.ch5

Cited by 3 publications

(2 citation statements)

References 103 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is almost no published information on the incorporation of parental resistance to the chimeric component. This is probably due to the very recent technique of the periclinal chimera, introduced only a few years ago by Nassar et al (2016). The only reported case involved resistance to insects by periclinal chimera through its epidermal layer.…”

Section: Resultsmentioning

confidence: 99%

Research Article Periclinal chimera can transfer resistance to nematodes in cassava

Ferreira¹,

Cares²,

Nassar³

2021

Genet. Mol. Res.

View full text Add to dashboard Cite

Screening cassava germplasm for resistance to the rootknot nematode (Meloidogyne javanica) showed that periclinal chimera, which came from combination of the wild species Manihot fortalezensis and indigenous cultivar UnB 201, resulted in resistance to M. javanica. Apparently periclinal chimera acquired resistance from M. fortalezensis, with its tissue forming a subepidermis and the internal tissue. Apparently, resistance was due to interaction of DNA in the chimera components, since the DNA moves within all plant tissues. This interaction provided the increased vigor observed in periclinal chimera. This is the first report of transferring resistance to a pathogen by periclinal chimera.

show abstract

Section: Resultsmentioning

confidence: 99%

Research Article Periclinal chimera can transfer resistance to nematodes in cassava

Ferreira¹,

Cares²,

Nassar³

2021

Genet. Mol. Res.

View full text Add to dashboard Cite

show abstract

“…All axillary buds from the same budstick developed very similar levels of NBF in ensuing vegetatively propagated progeny trees irrespective of position on the budstick (Table 1, Figure 1). Leaves (and associated axillary buds) are developmentally separated by approximately 120 • in the almond SAM, resulting in a phyllotaxy where every third leaf/axillary-bud would be roughly aligned with the same SAM derived shoot daughtercell sectors [28]. Consequently, any NBF-expressing sectors predicted by the chimera model for vegetative transmission of budsport mosaics should result in a general sector overlap and so altered expression at roughly every third axillary bud with intervening buds remaining unaffected (depending upon the size of the presumed sectorial chimera).…”

Section: Resultsmentioning

confidence: 99%

Propagation of an Epigenetic Age-Related Disorder in Almond Is Governed by Vegetative Bud Ontogeny Rather Than Chimera-Type Cell Lineage

Gradziel

Shackel

2021

Horticulturae

Self Cite

View full text Add to dashboard Cite

Almond (Prunus dulcis [Mill.] D.A. Webb) represents a model system for the study of epigenetic age-related disorders in perennial plants because the economically important noninfectious bud-failure disorder is well characterized and shown to be associated with the clonal-age of the propagation source. Epigenetic changes regulating disorders such as changes in methylation or telomere-length shortening would be expected to occur in shoot apical meristem initial cells since subsequent daughter cells including those in ensuing shoot axillary meristems show an irreversible advance in epigenetic aging. Because multiple initial cells are involved in meristem development and growth, such ‘mutations’ would be expected to occur in some initial cells but not others, resulting in mericlinal or sectorial chimeras during subsequent shoot development that, in turn, would differentially affect vegetative buds present in the leaf axils of the shoot. To test this developmental pattern, 2180 trees propagated from axillary buds of known position within asymptomatic noninfectious bud-failure budstick sources were evaluated for the disorder. Results demonstrate that relative bud position was not a determinant of successful trait propagation, but rather all axillary buds within individual shoots showed very similar degrees of noninfectious bud-failure. Control is thus more analogous to tissue-wide imprinting rather than being restricted to discrete cell lineages as would be predicted by standard meristem cell fate-mapping.

show abstract

Periclinal Chimera: A New Efficient Plant Breeding Technique

Nassar¹

2022

ABB

View full text Add to dashboard Cite

Periclinal chimera plants could be synthesized by a very easy grafting method. Thanks to this technique we can transfer useful characters from one genotype to another, we also can produce vigorous plants during a very short period. Recently in cassava, resistance to nematode could be transferred, and could develop vigorous plants by combining two types that have high combining ability. The most striking feature is that we can obtain enormous roots up to five times the common ones. By using this type of chimera we can replace traditional hybridization and no need to recurrent crosses cycles to transfer useful characters, reducing to a very short period developing a new variety and perpetuating it too.

show abstract

Interspecific Periclinal Chimeras as a Strategy for Cultivar Development

Cited by 3 publications

References 103 publications

Research Article Periclinal chimera can transfer resistance to nematodes in cassava

Research Article Periclinal chimera can transfer resistance to nematodes in cassava

Propagation of an Epigenetic Age-Related Disorder in Almond Is Governed by Vegetative Bud Ontogeny Rather Than Chimera-Type Cell Lineage

Periclinal Chimera: A New Efficient Plant Breeding Technique

Contact Info

Product

Resources

About