Apomixis in Plants

Asker, Sven; Jerling, Lenn

doi:10.1201/9781315137537

Cited by 228 publications

(287 citation statements)

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“…Asker and Jerling (1992) indicate only gametophytic apomixis, whereas Naumova (1993) lists eight species with reported adventitious embryony. Although Yu et al (2000) report sporophytic apomixis in Bothriochloa and Dichanthium, they do not provide supporting evidence.…”

Section: Asexual Reproductionmentioning

confidence: 99%

Flowering Plants. Monocots

Kellogg

2015

198

230

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Section: Asexual Reproductionmentioning

confidence: 99%

Flowering Plants. Monocots

Kellogg

2015

198

230

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“…parthenogenesis), and (3) formation of functional endosperm2. Although apomixis does not occur in major crop species, it is found in more than 400 species in 40 angiosperm families34. It attracts significant interest from an economic point of view, as the use of apomixis technology in major crop plants could potentially revolutionise agriculture.…”

mentioning

confidence: 99%

Diplosporous development in Boehmeria tricuspis: Insights from de novo transcriptome assembly and comprehensive expression profiling

Tang

Zang

Cheng

et al. 2017

Sci Rep

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Boehmeria tricuspis includes sexually reproducing diploid and apomictic triploid individuals. Previously, we established that triploid B. tricuspis reproduces through obligate diplospory. To understand the molecular basis of apomictic development in B. tricuspis, we sequenced and compared transcriptomic profiles of the flowers of sexual and apomictic plants at four key developmental stages. A total of 283,341 unique transcripts were obtained from 1,463 million high-quality paired-end reads. In total, 18,899 unigenes were differentially expressed between the reproductive types at the four stages. By classifying the transcripts into gene ontology categories of differentially expressed genes, we showed that differential plant hormone signal transduction, cell cycle regulation, and transcription factor regulation are possibly involved in apomictic development and/or a polyploidization response in B. tricuspis. Furthermore, we suggest that specific gene families are possibly related to apomixis and might have important effects on diplosporous floral development. These results make a notable contribution to our understanding of the molecular basis of diplosporous development in B. tricuspis.

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“…The genus Nigritella is one of the few genera of higher plants endemic to Europe (Gjӕrevoll ). Diploid members are distributed in the central European mountain ranges, from the Cantabrian Mountains in the west, over the Alps, to the Carpathians in the east, and to northern Greece in the south (Fig.…”

Section: Methodsmentioning

confidence: 99%

Evolution and systematics of polyploid Nigritella (Orchidaceae)

Hedrén

Lorenz²,

Teppner³

et al. 2018

Nordic Journal of Botany

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Members of the orchid genus Nigritella are widespread in European mountains, but species circumscriptions and evolutionary patterns in the genus are subjects to conflicting opinions. We analyzed a representative material of Nigritella for differentiation at nuclear and plastid marker loci. In agreement with predictions from embryological studies, diploid members of Nigritella are sexual and mostly out‐crossing, whereas triploid, tetraploid and pentaploid members are apomicts. The diploid taxa were poorly differentiated in the investigated molecular markers, except for the western N. gabasiana, which was separated in plastid haplotypes. Polyploid Nigritella aggregate into three groups and within each of these groups apomictic polyploids have given rise to new species. Within the N. nigra group, the tetraploid N. nigra subsp. austriaca is somewhat differentiated from the triploid subsp. nigra at nuclear as well as plastid loci. Fusion of an unreduced egg cell from subsp. nigra with a haploid microgamete from Gymnadenia conopsea gave rise to Gymnigritella runei. Within the N. widderi group, N. archiducis‐joannis is poorly separated from N. widderi in molecular markers, and the pentaploid N. buschmanniae has evolved by fusion of an unreduced egg cell from N. widderi with a haploid microgamete from a diploid Nigritella. Within the N. miniata group, N. stiriaca is somewhat differentiated from N. miniata at nuclear loci, but no other segregates of N. miniata are supported at species level. Polyploid Nigritella species accumulate genetic diversity by somatic mutations. In the widespread N. nigra subsp. austriaca and N. miniata this diversity is correlated to geography. Although some polyploids may be of recent origins, each polyploid contain genetic markers no longer encountered in diploid members of the genus. According to plastid marker data, Nigritella and Gymnadenia may constitute monophyletic sister genera.

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Apomixis in Plants

Cited by 228 publications

References 0 publications

Flowering Plants. Monocots

Flowering Plants. Monocots

Diplosporous development in Boehmeria tricuspis: Insights from de novo transcriptome assembly and comprehensive expression profiling

Evolution and systematics of polyploid Nigritella (Orchidaceae)

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