Estimation of outcrossing rates at small-scale flowering sites of the dwarf bamboo species, Sasa cernua
Estimation of outcrossing rates at small-scale flowering sites of the dwarf bamboo species, Sasa cernua
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DOI：
10.1007/s10265-010-0398-2
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发表时间：
2011-11-01
影响因子：
2.8
通讯作者：
Kawahara, Takayuki
中科院分区：
文献类型：
--
作者：
Kitamura, Keiko;Kawahara, Takayuki
研究了一种地方性矮竹（Sasa cernua）的小尺度花地异交率。矮竹群体异交率的多位点估计值为0.148 （SD = 0.118）。异交率最高的两根秆在一个位点上为杂合子基因型，而该位点上的其他秆为纯合子基因型。5个高异交率的秆产生2-17%纯合子基因型种子。由于自交优势，种子整体近交系数较高，但幼苗近交系数有所下降。这表明，对近亲繁殖后代的选择早在自然栖息地的建立过程中就开始了。
We estimated the outcrossing rates at small-scale flowering sites of an endemic dwarf bamboo species, Sasa cernua. The multi-locus estimation of the outcrossing rate of the dwarf bamboo population was 0.148 (SD 0.118). Two culms with the highest outcrossing rates had heterozygous genotypes at one locus, but other culms in the locus were homozygotes. Five culms with high outcrossing rates bore 2-17% seeds with homozygous genotypes. Due to predominant selfing, the overall inbreeding coefficient of seeds was high, although it declined in seedlings. This suggests that selection against inbred progenies began early in the establishment process in the natural habitat.