Jin-Ju Zhang

Jiangxi Normal University, I-ch’un-chen, Jiangxi Sheng, China

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Publications (3)9.37 Total impact

  • Ai-Hong Yang · Jin-Ju Zhang · Hua Tian · Xiao-Hong Yao ·
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    ABSTRACT: Premise of the study: A novel set of simple sequence repeat (SSR) markers were developed and characterized from the expressed sequence tag (EST) database of Liriodendron tulipifera for application in population genetic studies of Liriodendron. Methods and results: Thirty-nine polymorphic EST-SSR loci were identified among 27 individuals sampled from a cultivated population of L. tulipifera. The number of alleles per locus ranged from three to 18. The average observed heterozygosity and expected heterozygosity were 0.684 and 0.778, respectively. Of the 39 loci, 32 showed interspecific transferability and polymorphism in a related species, L. chinense. The number of alleles per locus ranged from two to 11, and the average observed heterozygosity and expected heterozygosity were 0.475 and 0.736, respectively. Conclusions: The developed EST-SSR markers will be useful for investigating adaptive genetic differentiation in Liriodendron.
    American Journal of Botany 10/2012; 99(11). DOI:10.3732/ajb.1200154 · 2.60 Impact Factor
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    Ai-Hong Yang · Jin-Ju Zhang · Xiao-Hong Yao · Hong-Wen Huang ·
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    ABSTRACT: A set of cpSSR markers were developed for the tree genus Liriodendron L. to investigate population genetic structure and phylogeographic history. Primers were designed directly from the chloroplast genome sequences of Liriodendron tulipifera. Among the 55 cpSSR markers tested, 11 polymorphic markers were identified in L. tulipifera. The number of alleles in the population tested ranged from two to five, and the unbiased haploid diversity per locus ranged from 0.074 to 0.644. Eighteen primer pairs generated polymorphic amplification in L. chinense. The number of alleles per locus ranged from two to seven, and the unbiased haploid diversity per locus was from 0.250 to 0.964. cpSSR markers developed here will be useful for phylogeography and population genetics studies of Liriodendron.
    American Journal of Botany 05/2011; 98(5):e123-6. DOI:10.3732/ajb.1000532 · 2.60 Impact Factor
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    Jin-Ju Zhang · Qi-Gang Ye · Xiao-Hong Yao · Hong-Wen Huang ·
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    ABSTRACT: For endangered plants interspecific hybridization occurring in ex situ collections may lead to failure of reintroduction actions. We used Sinojackia xylocarpa, a well documented Chinese endemic species that is extinct in the wild, as a model case to address this concern. We used paternity analyses to assess the spontaneous hybridization and patterns of pollen flow between S. xylocarpa and its congener species, S. rehderiana, in conserved populations in Wuhan Botanic Garden. Interspecific hybridization events were detected in seven out of eight maternal trees of S. xylocarpa, and an average of 32.7% seeds collected from maternal trees of S. xylocarpa were hybrids. The paternity of 93 out of 249 seedlings from S. xylocarpa assigned to S. rehderiana provided convincing evidence that spontaneous interspecific hybridization occurred extensively in the living garden collection we studied. Different patterns of pollen dispersal (predominantly short-distance vs. long-distance pollination) were observed between intra- and interspecific hybridization events in the garden. Pollen dispersal within the ex situ populations was not restricted by distance, as evidenced by a lack of significant correlations between the average effective pollen dispersal distance (δ) and the geographic distances (d1 and d2) between maternal and paternal trees. The interspecific pollen-dispersal distance ranged from 10 to 620.1 m (mean 294.4 m). Such extensive hybridization in ex situ collections could jeopardize the genetic integrity of endangered species and irrevocably contaminate the gene pool if such hybrids are used for reintroduction and restoration. We recommend strongly that measures be taken to minimize the genetic risks of this kind of hybridization, including establishing buffer zones in ex situ collections, manipulating flowering phenology, testing seed lots before use in reintroduction programs, and controlling pollination for seed purity. Resumen: Para plantas en peligro, la hibridación que ocurre en colecciones ex situ puede llevar al fracaso las acciones de reintroducción. Utilizamos Sinojackia xylocarpa, una bien documentada especie endémica de China que está extinta en su medio natural, como modelo para abordar esta preocupación. Utilizamos análisis de paternidad para evaluar la hibridación espontánea y los patrones de flujo de polen entre S. xylocarpa y su especie congénere, S. rehderiana, en poblaciones conservadas en el Jardín Botánico Wuhan. Los eventos de hibridación interespecífica fueron detectados en siete de ocho árboles maternos de S. xylocarpa y un promedio de 32.7% de las semillas recolectadas de los árboles maternos de S. xylocarpa fueron híbridas. La paternidad de 93 de 249 plántulas de S. xylocarpa asignadas a S. rehderiana proporcionó evidencia convincente de que la hibridación espontánea ocurrió extensivamente en la colección estudiada. Se observaron patrones diferentes de dispersión de polen (predominantemente polinización a distancia corta vs. distancia larga) entre los eventos de hibridación intraespecífica e interespecífica en el jardín. La dispersión de polen dentro de las poblaciones ex situ no fue restringida por la distancia, como lo evidenció la carencia de correlaciones significativas entre la distancia promedio de dispersión de polen efectiva (δ) y las distancias geográficas (d1 and d2) entre árboles maternos y paternos. La distancia de dispersión de polen interspecífico varió entre 10.0 y 620.1 m (media: 294.4 m). La hibridación extensiva en las colecciones ex situ podría comprometer la integridad genética de especies en peligro y contaminar la poza génica irreversiblemente sí tales híbridos son utilizados para la reintroducción y restauración. Recomendamos enfáticamente que se tomen medidas para minimizar los riesgos genéticos de este tipo de hibridación, incluyendo el establecimiento de zonas de amortiguamiento en colecciones ex situ, la manipulación de la fenología floral, pruebas a los lotes de semillas antes de usarlas en programas de reintroducción y control de la polinización para pureza de semillas.
    Conservation Biology 11/2009; 24(1):246-55. DOI:10.1111/j.1523-1739.2009.01357.x · 4.17 Impact Factor

Publication Stats

15 Citations
9.37 Total Impact Points


  • 2011-2012
    • Jiangxi Normal University
      I-ch’un-chen, Jiangxi Sheng, China
  • 2009
    • Chinese Academy of Sciences
      • Graduate School
      Peping, Beijing, China