Genetic structure of dioecious and trioecious Salix myrsinifolia populations at the border of geographic range
PBN-AR
Instytucja
Wydział Biologiczno-Chemiczny (Uniwersytet w Białymstoku)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Tree Genetics & Genomes (35pkt w roku publikacji)
ISSN
1614-2942
EISSN
1614-2950
Wydawca
SPRINGER HEIDELBERG
DOI
URL
Rok publikacji
2017
Numer zeszytu
15
Strony od-do
1-16
Numer tomu
13
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
2,71
Autorzy
Pozostali autorzy
+ 2
Słowa kluczowe
angielski
Sex structure;
Trioecy;
Dioecy;
Subdioecy;
AFLP
Streszczenia
Język
angielski
Treść
Gene flow in plant populations is heavily affected by species sexual systems. In order to study the effect of sex- ual systems on genetic structure, we examined plastid and nuclear DNA of 12 dioecious (males and females) and 18 trioecious (males, females and hermaphrodites) populations of Salix myrsinifolia—a boreal shrub with slow range expan- sion. Populations were located along latitudinal gradients across submarginal and marginal parts of the range. Individuals of each sex morph were all hexaploid. We identi- fied 10 chloroplast DNA haplotypes and scored 205 polymor- phic bands with amplified fragment length polymorphism. We found dioecious populations that differed from trioecious pop- ulations via the presence of four unique haplotypes and sig- nificant difference in Nei’s gene diversity index (0.119 vs. 0.116) and down-weighed marker value (1.17 vs. 1.02). The latter parameter, together with haplotype and nucleotide diver- sity, significantly decreased with latitude similar to the expan- sion front. Also, we found that 89% of hermaphrodite individ- uals belong to one distinct in tree parsimony network haplotype. This frequency significantly decreased with lati- tude towards the expansion front. We suspect that the presence of hermaphrodites in trioecious populations may represent a trade-off between the possibility of producing progeny by single hermaphrodites and genetic variability loss through au- togamy. S. myrsinifolia benefits from trioecious sexual sys- tems under colonization events. This phenomenon is no lon- ger a gain closer to the core of the species range.
Cechy publikacji
publikacja naukowa oryginalna
Inne
System-identifier
000040454
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