Mating System Analysis of Alnus maritima (Seaside Alder), a Rare Riparian Tree

Jones, James M.; Gibson, J. Phil

doi:10.2179/11-024

Cited by 2 publications

(1 citation statement)

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“…In studies of A. maritima, it was considered that in earlier stages, A. maritima was widely distributed across the North American continent; as an early succession tree species, its ability to fix nitrogen created conditions for the establishment of its successors. Together with its preference for light, high outcrossing rate, and low seed germination under natural conditions, it led to a fragmented distribution [11,12,47,48]. Further studies on the ecological function, population succession, mating system, and the mechanism of seed dispersal, as well as revealing their ecological benefits and more detailed distribution pattern are warranted for the genetic improvement of A. cremastogyne.…”

Section: Genetic Improvement Of a Cremastogynementioning

confidence: 99%

Genetic Diversity and Population Structure of Alnus cremastogyne as Revealed by Microsatellite Markers

Hong-ying

Wang

Huang

et al. 2019

Forests

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Alnus cremastogyne Burk. is a nonleguminous, nitrogen-fixing tree species. It is also the most important endemic species of Alnus Mill. in China, possessing important ecological functions. This study investigated population genetic variation in A. cremastogyne using 175 trees sampled from 14 populations native to Sichuan Province with 25 simple sequence repeat (SSR) markers. Our analysis showed that A. cremastogyne has an average of 5.83 alleles, 3.37 effective alleles, an expected heterozygosity of 0.63, and an observed heterozygosity of 0.739, indicating a relatively high level of genetic diversity. The A. cremastogyne populations in Liangshan Prefecture (Meigu, Mianning) showed the highest level of genetic diversity, whereas the Yanting population had the lowest. Our analysis also showed that the average genetic differentiation of 14 A. cremastogyne populations was 0.021. Analysis of molecular variance (AMOVA) revealed that 97% of the variation existed within populations; only 3% was among populations. Unweighted pair-group method with arithmetic means (UPGMA) clustering and genetic structure analysis showed that the 14 A. cremastogyne populations could be clearly divided into three clusters: Liangshan Prefecture population, Ganzi Prefecture population, the other population in the mountain area around the Sichuan Basin and central Sichuan hill area, indicating some geographical distribution. Further analysis using the Mantel test showed that this geographical distribution was significantly correlated with elevation.

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Section: Genetic Improvement Of a Cremastogynementioning

confidence: 99%