我国兴安、长白及华北落叶松种的天然群体交配系统研究

Abstract

Abstract:

Mating systems of nine natural populations of the three Chinese Larix taxa (L. gmelinii(Rupr.) Rupr., L. principis-rupprechtii Mayr. and L. olgensis Henry) were scored using seven polymorphic loci of allozyme markers generated by six enzymes (PGI, MDH, 6PGD, AAT, PGM and SDH). It was observed that population Jiagedaqi of L. gmelinii in Inner Mongolia exhibited nearly total outcrossing (t_m=0.986±0.081). Two populations of L. principis-rupprechtii, Fengning in Hebei Province and Hunyuan in Shanxi Province, shared no significant difference from random outcrossing (t_m=0.847±0.427~0.792±0.169). However, mating system was variable among populations of L. olgensis. Two populations, Xiaobaihu in Heilongjiang Province and Changbai in Jilin Province, exhibited significant level of selfing (t_m≈0.705). One population, Dahailin in Heilongjiang Province, exhibited inbreeding in addition to selfing, with t_m bein.0.684±0.107, and the other three populations of L. olgensis, Baihe in Jilin Province, Baidaoshan and Dongfanghong in Heilongjiang Province, exhibited predominantly outcrossing, t_m=0.847±0.427~1.203±0.371. These results were comparable to those reported in other conifers including L. laricina [DuRoi] K. Koch and L. decidua Miller.

Key words: Larix gmelinii(Rupr.) Rupr., L.olgensis Henry, L.principis-rupprechtii Mayr., Mating system

Xinsheng Hu,Richard A. Ennos. SCORING THE MATING SYSTEMS OF NATURAL POPULATIONS OF THREE LARIX TAXA IN CHINA: L. GMELINII (RUPR.) RUPR., L. OLGENSIS HENRY AND L. PRINCIPIS-RUPPRECHTII MAYR.[J]. Scientia Silvae Sinicae, 1999, 35(1): 21-31.

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References 0

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SCORING THE MATING SYSTEMS OF NATURAL POPULATIONS OF THREE LARIX TAXA IN CHINA: L. GMELINII (RUPR.) RUPR., L. OLGENSIS HENRY AND L. PRINCIPIS-RUPPRECHTII MAYR.

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