| Autor: |
Nakanishi, Atsushi, Goto, Susumu, Sumiyoshi, Chikako, Isagi, Yuji |
| Předmět: |
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| Zdroj: |
Tree Genetics & Genomes; Aug2024, Vol. 20 Issue 4, p1-11, 11p |
| Abstrakt: |
This study aimed to elucidate the contribution of pollen immigration to the maintenance of genetic diversity in the pollen pools received by seed parents in a riparian population of Cercidiphyllum japonicum. We estimated the pattern of potential pollen dispersal and assessed the effective number of pollen parents (Nep) and the spatial genetic structures (SGS) of pollen pools from both outside and inside the population, using the genotypes at five microsatellite loci of reproductive individuals and seeds in the population distributed along a stream. A neighborhood model approach suggested substantial pollen immigration rate (37.9%) and the fat-tailed dispersal kernel expressed as an exponential power function with a shape parameter (b) of 0.154 and a mean distance of 1,235 m, which indicated a high ability to increase Nep at locations distant from the pollen sources. Pollen pools from outside the population (outside pollen pools) genetically differed from those from inside the population (inside pollen pools), and the Nep was five times larger in the outside pollen pools (22.5) than the inside pollen pools (4.5). Furthermore, the estimate of genetic differentiation (pairwise ΦFT) between each seed parent pair in the outside pollen pools tended to be constant and much lower than that of the inside pollen pools, which may be attributed to the high genetic diversity of the outside pollen pools. Pollen immigration should contribute to genetic diversity of the population by introducing a small amount of new or low-frequent alleles and increasing the Nep of total pollen pools within the population. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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