厦门木麻黄种群交配系统及近交衰退

应用生态学报 ›› 2002, Vol. ›› Issue (11): 1377-1380.

厦门木麻黄种群交配系统及近交衰退

陈小勇¹, 林鹏²

1. 华东师范大学环境科学系, 上海, 200062;
2. 厦门大学生物学系, 厦门, 361005

收稿日期:2000-01-13 修回日期:2000-07-21
通讯作者: 陈小勇,男,1967年生,博士,副教授,主要从事遗传生态学和污染生态学研究,发表论文40余篇.E-mail:xychens@public4.sta.net.cn
基金资助:
福建省自然科学基金资助项目(C97009)

CHEN Xiaoyong¹, LI Peng ²

1. Department of Environmental Science, East China Normal University, Shanghai 200062;
2. Department of Biology, Xiamen University, Xiamen 361005

Received:2000-01-13 Revised:2000-07-21

摘要/Abstract

摘要： 木麻黄耐沙生、盐碱,是沿海优良的防护林树种.从20世纪80年代开始,木麻黄林呈现出衰退现象.采用等位酶分析技术研究木麻黄种群的交配系统及近交衰退,木麻黄种群异交率为0.622,表明为混合交配类型,与其亲缘种比较来看,引种降低了木麻黄异交率,增加了近交.采用电泳数据间接估算的近交衰退程度很高.结果表明,引种过程中的建立者效应引起的近交及其后的近交衰退确实在木麻黄林衰退中起了重要作用,根据基因型有选择地引进木麻黄以减轻衰退.

关键词: 异交率, 近交衰退, 引入种, 木麻黄, 光量子通量密度, 生态系统呼吸, 饱和水汽压差, 晴空指数, 净生态系统交换量

Abstract: Casuarina equisetifolia, an introduced species, is a good shelter species planted along coastlines due to its enduring sandy and saline habitats.Decline was,however,observed in C. equisetifolia plantations in many areas since 1980's. Mating system and inbreeding retrogression of a plantation of C. equisetifolia in Xiamen and their roles in the decline of C. equisetifolia forests were thus researched using allozyme technique.Multilocus outcrossing rate was 0.622, lower than that expected from related species,indicating a mixed mating system,and more inbreeding caused through this introduction.Calculations from electrophoresis data showed that very a high inbreeding retrogression occurred in the C. equisetifolia plantation,indicating that inbreeding an its subsequent retrogression played an important role in the decline of C. equisetifolia plantation.Alleviating the decline through genotype species introduction was also proposed.

Key words: net ecosystem exchange, vapor pressure deficit, clearness index, photosynthetic photon flux density, ecosystem respiration.

中图分类号:

Q347

陈小勇, 林鹏. 厦门木麻黄种群交配系统及近交衰退[J]. 应用生态学报, 2002, (11): 1377-1380.

CHEN Xiaoyong, LI Peng . [J]. Chinese Journal of Applied Ecology, 2002, (11): 1377-1380.

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