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西南桦自由授粉子代适应性与斑块大小、遗传多样性间的相关性 被引量:2

Preliminary Report on Offspring Fitness in Relation to Patch Size and Genetic Diversity of Betula alnoides in A Heterogenous Landscape
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摘要 以位于广西靖西土石山生态交错区的9个西南桦斑块为研究对象,通过种子收集、种子萌发与幼苗培育试验,揭示西南桦子代适应性与斑块大小、遗传多样性间的关系。结果表明,种子重量与种子萌发率、胚根长、芽苗长呈极显著正相关(p<0.01),而仅与移苗后2个月时的苗高及移苗后5个月时的地径呈显著正相关(p<0.05),说明种子萌发阶段母本效应很明显,而在幼苗生长阶段母本效应逐渐减弱;种子千粒重、萌发特征、幼苗生长表现指标与斑块大小、遗传多样性指标大多呈不显著相关(p>0.05)或呈显著负相关,而且各石山斑块跟土山大斑块间的地理距离与相应斑块的子代适应性指标大多呈负相关,说明斑块间存在强烈的花粉流,这种相关性规律是斑块大小以及斑块间地理距离等因素共同作用的结果。 Relationship between offspring fitness and patch investigated through trials of seed germination and seedling size and genetic diversity of Betula alnoides was growth with seeds collected from nine patches of this species in an ectone of two types of soils originated from limestone (site L) and granite (site G) at Jingxi County, Guangxi. The results showed that seed mass had significantly positive correlation to ratio of germinaring seed, length of radicle and whole little seedling , and only to seedling height in two month and collar diameter in five month after transplanted, which inferred that maternal effect existed remarkably at stage of seed germination, while became less obvious at stage of seedling development. The majority traits of offspring fitness were not significantly related to, or remarkably negatively related to patch size and genetic diversity, and geographic distances between patches at site L and the big patch at site G were mostly negatively related to their offspring fitness, this was due to the fact that there existed strong pollen flows between patches, and this kind of relationship resulted from joint effects of many factors such as patch size, distance between patches.
出处 《种子》 CSCD 北大核心 2012年第5期15-18,22,共5页 Seed
基金 国家自然科学基金项目(编号:31070602) 中央级公益性科研院所基本科研业务费专项资金项目(编号:RITFYWZX 200903)
关键词 西南桦 遗传多样性 斑块大小 子代适应性 Betula alnoides Buch. Ham. ex D. Don genetic diversity patch size offspring fitness
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  • 1Gonzalez-Varo J P, Albaladejo R G, Aparicio A, et al. Linking genetic diversity, mating patterns and progeny performance in fragmented populations of Mediterranean shrub [ J ]. Journal of Applied Ecology ,2010,47:1 242 -1 252.
  • 2Dauber J, Biesmeijer J C, Gabriel D, et al. Effects of patch size and density on flower visitation and seed set of wild plants : a pan-European approach[ J ]. Journal of Ecology, 2010,98 : 188 - 196.
  • 3Menges E S. Seed germination percentage increases with popu- lation size in a fragmented prairie species[ J]. Conservation Bi- ology,1991,5(2) :158 - 164.
  • 4Ouborg N J & Van Treuren R. Variation in fitness-related char- aeters among small and large populations of Salvia pratensis [ J]. Journal of Ecology, 1995,83:369 - 380.
  • 5Pluess A R & Stocklin J. Genetic diversity and fitness in Scabi- osa columbaria in the Swiss Jura in relation to population size [ J ]. Conservation Genetics ,2004 ( 5 ) : 145 - 156.
  • 6Reed D H. Relationship between population size and fitness [ J ]. Conservation Biology, 2005,19 (2) : 563 - 568.
  • 7曾杰,郭文福,赵志刚,翁启杰,尹光天,郑海水.我国西南桦研究的回顾与展望[J].林业科学研究,2006,19(3):379-384. 被引量:99
  • 8程伟,曾杰,赵志刚,郭俊杰,沙二,刘宝,赖家业.两种生境条件下西南桦的生殖构件及其空间格局[J].热带亚热带植物学报,2010,18(1):75-81. 被引量:8
  • 9翁启杰,曾杰,郑海水.西南桦育苗技术研究[J].林业实用技术,2004(5):20-22. 被引量:16
  • 10Peterson A, Bartish I V, Peterson J. Effects of population size on genetic diversity ,fitness and pollinator community composi- tion in fragmented populations of Anthericum liliago L [ J ]. Plant Ecology,2008,198 : 101 - 111.

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