3
$\begingroup$

For a given plant species, how many types of S-loci exists to prevent self-pollination? I would like to know how often a plant stops fertilization process by other plants, thinking the pollens belong to itself due to limitations of SSI/GSI.

$\endgroup$
  • $\begingroup$ The answer is going to vary dramatically depending on the species. Have you checked wikipedia? $\endgroup$ – tyersome Jun 22 at 21:44
  • $\begingroup$ An examples suffices. $\endgroup$ – Miladiouss Jun 23 at 0:44
2
$\begingroup$

Herrera, Sara et al. 2018 suggest that there are at least 33 S-alleles in apricot.

I believe some species of Brassica have at least 60 S-alleles identified.

However, there are dominance relationships among these alleles, so I don't think you can directly extrapolate from the number alleles to to the rate at which non-self pollen will be excluded. The frequencies of the different alleles within a population will clearly also affect this calculation.

In addition, different individuals with the same S-alleles are more likely to be closely related, so I would hesitate to classify this as a limitation of the system.

Ref: Herrera, Sara et al. “Identification of Self-Incompatibility Alleles by Specific PCR Analysis and S-RNase Sequencing in Apricot.” International journal of molecular sciences vol. 19,11 3612. 15 Nov. 2018, doi:10.3390/ijms19113612

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.