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一、前言日本落叶松有初胚的饱满粒和无胚的秕粒,从外观上是难以区别的。这是因为没有受粉的胚珠珠皮与受粉形成的胚珠珠皮同样发育。所以日本落叶松自交时秕粒多,其原因在于没有受粉的胚珠和受粉但没有形成胚的胚珠发育结果。在调查自交亲合性时了解到,假设所有的胚珠都受了粉,那么所得到的种子的亲合性就代表原来自交时的亲合性。但是,在没有受粉的胚珠占比率多的情况下,应把根本就没有受粉,不可能形成胚的除掉,仅调查受粉后的胚珠所形成的胚的比率,是很必要的。而这项调查,对于正确掌握自交亲合性及不同受粉条件的试验和无性系间的比较是很有利的。自交受粉,普遍采用的是,把雌球花和雄球花装入同一个交配袋进行受粉的方法。
First, the preface Japanese larch has embryos with full grains and embryo-free tablets, from the appearance is indistinguishable. This is because the unpolished embryo bead peel develops similarly to the ovule formed by powder. Therefore, Japanese larch seedlings self-pollinated more because of the lack of powdery ovules and pollen but did not form embryos ovule development results. When investigating self-compatibility, it is understood that, given that all the ovules are affected by the powder, the affinity of the resulting seeds represents the affinity of the original selfed. However, in the case of a large proportion of ovules that are not affected by powder, there should be no powder at all and it is impossible to form embryos. It is necessary to investigate only the ratio of embryos formed from the ovules after the powder is pollinated. This survey, however, is very beneficial for a correct understanding of the self-compatibility and different powder conditions tested and between clones. Self-pollinated powder, commonly used is that the female ball and male ball flowers into the same bag for powder powder.