Comparative transcriptome analysis of ovules reveals stress related genes associated with nucellar polyembryony in citrus

Kumar, Vikash; Malik, Sunil; Pal, Digvender; Srinivasan, Raji; Bhat, S. R.

doi:10.1007/s11295-013-0690-0

Cited by 23 publications

(24 citation statements)

References 44 publications

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“…To identify genes that are differentially expressed between polyembryony and monoembryony, a comparative transcriptome analysis was performed on the ovules from three pairs of monoembryonic and polyembryonic citrus cultivars (pummelo-grapefruit, citron-lemon, clementine-ponkan) at the key stage of nucellar embryo initiation (i.e., 3 d before anthesis) 14,15 . Considering the genetic differences between each pair of citrus cultivars, we performed a pairwise comparison of the three pairs of RNA-seq data.…”

Section: Transcriptome Of Sexual and Nucellar Embryos From Citrusmentioning

confidence: 99%

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Genomic analyses of primitive, wild and cultivated citrus provide insights into asexual reproduction

et al. 2017

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The emergence of apomixis-the transition from sexual to asexual reproduction-is a prominent feature of modern citrus. Here we de novo sequenced and comprehensively studied the genomes of four representative citrus species. Additionally, we sequenced 100 accessions of primitive, wild and cultivated citrus. Comparative population analysis suggested that genomic regions harboring energy- and reproduction-associated genes are probably under selection in cultivated citrus. We also narrowed the genetic locus responsible for citrus polyembryony, a form of apomixis, to an 80-kb region containing 11 candidate genes. One of these, CitRWP, is expressed at higher levels in ovules of polyembryonic cultivars. We found a miniature inverted-repeat transposable element insertion in the promoter region of CitRWP that cosegregated with polyembryony. This study provides new insights into citrus apomixis and constitutes a promising resource for the mining of agriculturally important genes.

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Section: Transcriptome Of Sexual and Nucellar Embryos From Citrusmentioning

confidence: 99%

“…This locus was later mapped to a genomic region that spans approximately 380 kb 12 . Genes differentially expressed during polyembryogenesis have also been identified [13][14][15] .…”

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confidence: 99%

Genomic analyses of primitive, wild and cultivated citrus provide insights into asexual reproduction

et al. 2017

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“…Among these, as already mentioned, are female parents whose seeds show high levels of polyembryony, with the restricted generation of hybrids due to the frequent formation of embryos of apomictic origin and the infrequent development of zygotic individuals. Kumar et al (2014), studying the relation between abiotic stress and the manifestation of polyembryony, found that the development of nucellar cells occurs during the pre-anthesis phase, when the genes responsible for the formation of apomictic embryos would be expected to remain active. These authors comment that abiotic stress is linked to the signalling and triggering of gene expression cascades responsible for the production of reactive oxygen species (ROS) and H 2 O 2.…”

Section: Resultsmentioning

confidence: 99%

Water deficit increases the frequency of hybrid citrus with polyembryonic female parents

Almeida

Santana-Vieira

Almeida

et al. 2018

Crop Breed. Appl. Biotechnol.

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“…Microarrays and SSH have been used to identify the genes associated with polyembryony in Citrus. Studies have also been made to associate polyembryonic with heat stress [94].…”

Section: Genetic Studiesmentioning

confidence: 99%

Polyembryony in Maize: A Complex, Elusive, and Potentially Agronomical Useful Trait

Michel¹,

Cruz‐Requena²,

Sanchez³

et al. 2018

Maize Germplasm - Characterization and Genetic Approaches for Crop Improvement

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Polyembryony (PE) is a rare phenomenon in cultivated plant species. Since nineteenth century, several reports have been published on PE in maize. Reports of multiple seedlings developing at embryonic level in laboratory and studies under greenhouse and field conditions have demonstrated the presence of PE in cultivated maize (Zea mays L.). Nevertheless, there is a lack of knowledge about this phenomenon; diverse genetic mechanisms controlling PE in maize have been proposed: Mendelian inheritance of a single gene, interaction between two genes and multiple genes are some of the proposed mechanisms. On the other hand, the presence of two or more embryos per seed confers higher nutrimental quality because these grains have more crude fat and lysine than normal maize kernels. As mentioned above, there is a necessity for more studies about PE maize in order to establish the genetic mechanism responsible for this phenomenon; on the other hand, previous studies showed that PE has potential to generate specialized maize varieties with yield potential and grain quality.

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Comparative transcriptome analysis of ovules reveals stress related genes associated with nucellar polyembryony in citrus

Cited by 23 publications

References 44 publications

Genomic analyses of primitive, wild and cultivated citrus provide insights into asexual reproduction

Genomic analyses of primitive, wild and cultivated citrus provide insights into asexual reproduction

Water deficit increases the frequency of hybrid citrus with polyembryonic female parents

Polyembryony in Maize: A Complex, Elusive, and Potentially Agronomical Useful Trait

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