Unequal allelic frequencies at the self-incompatibility locus within local populations of Prunus avium L.: an effect of population structure?

2008 ◽  
Vol 21 (3) ◽  
pp. 889-899 ◽  
Author(s):  
S. STOECKEL ◽  
V. CASTRIC ◽  
S. MARIETTE ◽  
X. VEKEMANS
Keyword(s):  
Population Structure ◽  
Prunus Avium ◽  
The Self ◽  
Self Incompatibility ◽  
Allelic Frequencies ◽  
Local Populations ◽  
Incompatibility Locus ◽  
Prunus Avium L

scholarly journals Balancing selection and the crossing of fitness valleys in structured populations: diversification in the gametophytic self-incompatibility system

2021 ◽  
Author(s):  
Roman Stetsenko ◽  
Thomas Brom ◽  
Vincent Castric ◽  
Sylvain Billiard
Keyword(s):  
Population Structure ◽  
Allelic Diversity ◽  
Structured Populations ◽  
The Self ◽  
Population Subdivision ◽  
Island Population ◽  
Single Mutation ◽  
Self Incompatibility ◽  
S Locus ◽  
Incompatibility Locus

The self-incompatibility locus (S-locus) of flowering plants displays a striking allelic diversity. How such a diversity has emerged remains unclear. In this paper, we performed numerical simulations in a finite island population genetics model to investigate how population subdivision affects the diversification process at a S-locus, given that the two-genes architecture typical of S-loci involves the crossing of a fitness valley. We show that population structure increases the number of self-incompatibility haplotypes (S-haplotypes) maintained in the whole metapopulation, but at the same time also slightly reduces the parameter range allowing for their diversification. This increase is partly due to a reinforcement of the diversification and replacement dynamics of S-haplotypes within and among demes. We also show that the two-genes architecture leads to a higher diversity compared with a simpler genetic architecture where new S-haplotypes appear in a single mutation step. We conclude that population structure helps explain the large allelic diversity at the self-incompatibility locus. Overall, our results suggest that population subdivision can act in two opposite directions: it makes easier S-haplotypes diversification but increases the risk that the SI system is lost.

Development of tensile strength in compatible and incompatible sweet cherry graftings

2005 ◽  
Vol 83 (2) ◽  
pp. 202-210 ◽  
Author(s):  
Bjarne Hjelmsted Pedersen
Keyword(s):  
Tensile Strength ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
The Self ◽  
The Other ◽  
Preliminary Work ◽  
Cherry Rootstocks ◽  
Sweet Cherry Cultivars ◽  
Prunus Avium L

The tensile strengths of graftings between three selected sweet cherry cultivars and five selected cherry rootstocks were determined with an Instron instrument 6, 12, and 18 weeks after grafting and compared with the tensile strength of self-grafted rootstocks and graftings of rootstocks used as scions. The combination of sweet cherry cultivars and rootstocks was selected to provide a range of compatibility based on preliminary work. The tensile strengths of sweet cherry cultivars grafted on different rootstocks never exceeded the tensile strengths of the self-grafted rootstocks. Rootstocks grafted as scions on Prunus avium L. rootstocks and self-grafted rootstocks produced some of the strongest unions tested and also produced union strength much faster than any of the other combinations. The degree of compatibility was quantified and results indicated that if this value was below 0.2, measured 18 weeks after grafting, it corresponded to combinations with major risks of delayed incompatibility.Key words: tensile strength, grafting, compatibility, sweet cherry, Prunus avium.

Development of a simple molecular marker specific for detecting the self-compatibleS4′ haplotype in sweet cherry (Prunus avium L.)

2004 ◽  
Vol 22 (4) ◽  
pp. 387-398 ◽  
Author(s):  
Mo Zhu ◽  
Xiaoming Zhang ◽  
Kaichun Zhang ◽  
Lijie Jiang ◽  
Limin Zhang
Keyword(s):  
Molecular Marker ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
The Self ◽  
Prunus Avium L
Sign in / Sign up

Export Citation Format

Share Document