Plasticity in the self-incompatibility system of cultivated Nicotiana alata

Liao, Jugou; Dai, Jinran; Kang, Hongmei; Liao, Kongfeng; Ma, Wenguang; Wang, Jianguang; Chen, Suiyun

doi:10.1007/s10681-015-1606-x

Cited by 12 publications

(11 citation statements)

References 45 publications

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“…In some Brassicaceae species, variation in PSC has been shown to be caused by genetic variation in genes unlinked to the S-locus but involved in the SI signaling cascade that mediates the rejection of self-pollen (Liu et al, 2007; Baldwin and Schoen, 2017). This pattern has also been confirmed in either GSI or SSI species (Good-Avila and Stephenson, 2002; Mable et al, 2005; Mena-Ali and Stephenson, 2007; Crawford et al, 2015; Liao et al, 2016).…”

Section: Factors Affecting the Pseudo-self-compatibilitysupporting

confidence: 53%

“…Pseudo-self-compatibility has been observed in numerous self-incompatible species in Asteraceae, Brassicaceae, Fabaceae, Poaceae, Ranunculaceae, Solanaceae, and other families (Good-Avila et al, 2008; Crawford et al, 2015; Liao et al, 2016). In these species, numerous external and internal factors seem to affect the ability of plants to overcome SI barrier, including the pollen germination speed, the relative growth rate of self-pollen tubes compared to cross-pollen grains, and the flower aging (Levin, 1996; Stephenson et al, 2000; Good-Avila et al, 2008; Horisaki and Niikura, 2008).…”

Section: Factors Affecting the Pseudo-self-compatibilitymentioning

confidence: 99%

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The Paradox of Self-Fertile Varieties in the Context of Self-Incompatible Genotypes in Olive

et al. 2019

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Olive, representing one of the most important fruit crops of the Mediterranean area, is characterized by a general low fruit yield, due to numerous constraints, including alternate bearing, low flower viability, male-sterility, inter-incompatibility, and self-incompatibility (SI). Early efforts to clarify the genetic control of SI in olive gave conflicting results, and only recently, the genetic control of SI has been disclosed, revealing that olive possesses an unconventional homomorphic sporophytic diallelic system of SI, dissimilar from other described plants. This system, characterized by the presence of two SI groups, prevents self-fertilization and regulates inter-compatibility between cultivars, such that cultivars bearing the same incompatibility group are incompatible. Despite the presence of a functional SI, some varieties, in particular conditions, are able to set seeds following self-fertilization, a mechanism known as pseudo-self-compatibility (PSC), as widely reported in previous literature. Here, we summarize the results of previous works on SI in olive, particularly focusing on the occurrence of self-fertility, and offer a new perspective in view of the recent elucidation of the genetic architecture of the SI system in olive. Recent advances in research aimed at unraveling the molecular bases of SI and its breakdown in olive are also presented. The clarification of these mechanisms may have a huge impact on orchard management and will provide fundamental information for the future of olive breeding programs.

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Section: Factors Affecting the Pseudo-self-compatibilitysupporting

confidence: 53%

Section: Factors Affecting the Pseudo-self-compatibilitymentioning

confidence: 99%

The Paradox of Self-Fertile Varieties in the Context of Self-Incompatible Genotypes in Olive

et al. 2019

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“…This process, known as pseudo-self-incompatibility, has also been reported in grasses in which artificial self-pollination techniques can contribute to SI breakdown (Do Canto et al, 2016). Similarly, sporadic fruit set has been observed across Solanaceae species such as Witheringia solanacea , S. carolinense , S. peruvianum , and N. alata in which floral age, flowering stage, and delayed floral abscission has been associated with fruit set in SI populations (Stone et al, 2006; Mena-Ali and Stephenson, 2007; Miller and Kostyun, 2011; Liao et al, 2016). This phenomenon has also been observed in species under sporophytic SI, in which floral age reduces the expression of the S -locus associated genes in Brassica oleracea resulting in SI breakdown (Hadj-Arab et al, 2010).…”

Section: Discussionmentioning

confidence: 80%

Overcoming Self-Incompatibility in Diploid Potato Using CRISPR-Cas9

et al. 2019

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Potato breeding can be redirected to a diploid inbred/F1 hybrid variety breeding strategy if self-compatibility can be introduced into diploid germplasm. However, the majority of diploid potato clones ( Solanum spp.) possess gametophytic self-incompatibility that is primarily controlled by a single multiallelic locus called the S -locus which is composed of tightly linked genes, S-RNase ( S -locus RNase) and multiple SLFs ( S -locus F-box proteins), which are expressed in the style and pollen, respectively. Using S-RNase genes known to function in the Solanaceae gametophytic SI mechanism, we identified S-RNase alleles with flower-specific expression in two diploid self-incompatible potato lines using genome resequencing data. Consistent with the location of the S -locus in potato, we genetically mapped the S-RNase gene using a segregating population to a region of low recombination within the pericentromere of chromosome 1. To generate self-compatible diploid potato lines, a dual single-guide RNA (sgRNA) strategy was used to target conserved exonic regions of the S-RNase gene and generate targeted knockouts (KOs) using a Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated protein 9 (Cas9) approach. Self-compatibility was achieved in nine S-RNase KO T 0 lines which contained bi-allelic and homozygous deletions/insertions in both genotypes, transmitting self compatibility to T 1 progeny. This study demonstrates an efficient approach to achieve stable, consistent self-compatibility through S-RNase KO for use in diploid potato breeding approaches.

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“…The pattern of pollen tube growth seen in the carpel of two E. umbellata individuals can be described as a “leaky” SI response, which is a characteristic associated with low rates of self‐fruit set (Levin, 1996). Such “pseudo self‐compatible” individuals have been documented in numerous SI species (Baldwin & Schoen, 2017; Docherty, 1982; Liao et al, 2016), and the trait may serve to benefit SI plants by providing reproductive assurance when mates or pollinators are limited. The finding of fully autogamous individuals in E. umbellata at one site is interesting given its predicted rarity in perennial species (Lloyd & Schoen, 1992; Pannell & Barrett, 1998).…”

Section: Discussionmentioning

confidence: 99%

Reproductive biology and pollinators of the invasive shrub Autumn olive (Elaeagnus umbellata Thunberg)

Soley

Sipes

2020

Plant Species Biology

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This study examined the reproductive biology of the invasive nitrogen‐fixing shrub Elaeagnus umbellata. Hand‐pollination experiments and pollinator‐exclusion experiments were performed in four Illinois, U.S.A. populations to determine the breeding system of E. umbellata, and floral visitors were collected to determine pollinators in the invasive range. Although self‐compatibility is a trait shown to confer invasiveness, our experiments revealed that E. umbellata is a mostly outcrossing species with a self‐incompatible breeding system. Variation does exist in that a small percentage of individuals allow self‐fertilization through autogamy. There is also variability among plants in the separation of male and female floral parts that may further affect selfing potential. The majority of floral visitors to E. umbellata were generalist pollinators, including bees, flies, and moths. Many of the larger insect visitors are pollinators of E. umbellata based on analysis of pollen on insect specimens, but smaller insects do not pollinate as frequently. Its ability to attract generalist pollinators means that E. umbellata will produce fruit wherever pollinators and mates occur; however, the low fruit set on open‐pollinated branches contrasts with the idea of a prolifically fruiting plant. E. umbellata seems to serve as a reliable food source for many ecologically and economically significant insects, including native bumble bees (Bombus), the exotic honey bee (Apis mellifera), and armyworm (Mythimna unipuncta), a crop pest.

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Plasticity in the self-incompatibility system of cultivated Nicotiana alata

Cited by 12 publications

References 45 publications

The Paradox of Self-Fertile Varieties in the Context of Self-Incompatible Genotypes in Olive

The Paradox of Self-Fertile Varieties in the Context of Self-Incompatible Genotypes in Olive

Overcoming Self-Incompatibility in Diploid Potato Using CRISPR-Cas9

Reproductive biology and pollinators of the invasive shrub Autumn olive (Elaeagnus umbellata Thunberg)

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