Developmental stability, B chromosomes and suspectibility to parasitism in the yellow-necked mouse Apodemus flavicollis
2019
Autori:
Jojić, VidaČabrilo, Borislav
Vujošević, Mladen
Jovanović, Vladimir
Bjelić-Čabrilo, Olivera
Blagojević, Jelena
Tip dokumenta:
Konferencijski prilog (Objavljena verzija)
,
© 2019 by the Serbian Genetic Society
Metapodaci
Prikaz svih podataka o dokumentuApstrakt:
Developmental stability (DS), along with canalization, represents an element of developmental
homeostasis (DH). DH is defined as the mechanism responsible for ensuring phenotypic
constancy in organisms despite the great variability of genetic and environmental features.
DS is usually measured by fluctuating asymmetry (FA) which refers to the minor, random
differences between the two sides in bilaterally symmetric traits. The factors that cause
FA can be either genetic or environmental in origin. In this study we used 276 mandibles
and 323 crania of adult yellow-necked mice (Apodemus flavicollis) featured by the frequent
presence of supernumerary B chromosomes (Bs). We investigated the associations between
developmental stability and susceptibility to nematode parasitism in this species in the
context of Bs presence or absence. In agreement with prevailing view that Bs are genomic
parasites, B carriers would possess lower level of DS, i.e. higher level of FA, compared to noncarriers.
We hypothesized that parasitized individuals should be more asymmetric as well.
By applying landmark-based geometric morphometrics, we estimated the levels of FA (FA10a
indices) for mandibular size and shape and cranial shape in non-parasitized B non-carriers
(NPB0), parasitized B non-carriers (PB0), non-parasitized B carriers (NPB+) and parasitized B
carriers (PB+). According to the hypotheses mentioned above, NPB0 mice would possess the
lowest FA10a indices. Although our results revealed no significant differences in the levels
of FA, NPB0 individuals are characterized by the lowest FA10a index for mandibular size, but
the highest FA10a index for cranial shape. Additionally, the similar levels of FA estimated for
PB0 and PB+ mice indicated that B chromosomes are not linked to developmental stability
and susceptibility to nematode parasitism in this species.
Ključne reči:
cranium; developmental homeostasis; fluctuating asymmetry; geometric morphometrics; mandibleFinansiranje / projekti:
- Genetička i fenetička raznovrsnost u prirodnim populacijama u različitim sredinama - doprinos polimorfizma B hromozoma (RS-MESTD-Basic Research (BR or ON)-173003)
U:
- 6th Congress of the Serbian genetic society: Book of abstracts; 2019 Oct 13-17; Vrnjačka Banja, Serbia. Belgrade: Serbian Genetic Society; 2019. p. 139.