Unreduced Megagametophyte Formation via Second Division Restitution Contributes to Tetraploid Production in Interploidy Crosses With 'Orah' Mandarin (Citrusreticulata)

doi:10.15302/j-fase-2021385

Cited by 1 publication

(2 citation statements)

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“…In interploid crossing, the formation of tetraploids in addition to triploids indicates the predominant formation of the unreduced (2n) gametes which may be formed by the first division restitution (FDR) or second division restitution (SDR) during meiosis. Production of 2n gametes was predominantly via SDR in lemon [44,45] and monoembryonic Orah mandarin [57]. Higher tetraploid: triploid ratio in the progeny of the interploid hybridization indicates greater production of the 2n megagemtophytes in that cultivar which is promising to produce a greater number of polyploids.…”

Section: Ploidy Manipulationsmentioning

confidence: 99%

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Citrus Biotechnology: Current Innovations and Future Prospects

Mustafa¹,

Usman²,

Joyia³

et al. 2021

Citrus - Research, Development and Biotechnology

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Citrus is a valuable fruit crop worldwide. It not only provides essential minerals and vitamins but is also of great commercial importance. Conventional research has contributed a lot to the improvement of this fruit plant. Numerous improved varieties have been developed through conventional breeding, mutational breeding, polyploidization and tissue culture yet pathogens continue to emerge at a consistent pace over a wide range of citrus species. Citriculture is vulnerable to various biotic and abiotic stresses which are quite difficult to be controlled through conventional research. Biotechnological intervention including transgenesis, genome editing, and OMICS offers several innovative options to resolve existing issues in this fruit crop. Genetic transformation has been established in many citrus species and transgenic plants have been developed having the ability to tolerate bacterial, viral, and fungal pathogens. Genome editing has also been worked out to develop disease-resistant plants. Likewise, advancement in OMICS has helped to improve citrus fruit through the knowledge of genomics, transcriptomics, proteomics, metabolomics, interactomics, and phenomics. This chapter highlights not only the milestones achieved through conventional research but also briefs about the achievements attained through advanced molecular biology research.

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Section: Ploidy Manipulationsmentioning

confidence: 99%

“…It is used for inducing chromosome doubling or developing tetraploids by restricting the chromosomal segregation at metaphase in meiosis [42,43]. Other methods of polyploid induction include interploid hybridization [44], unreduced gamete formation [45,46], and endosperm culture [47,48].…”

Section: Ploidy Manipulationsmentioning

confidence: 99%