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早在达尔文时期的生物学家们就已经注意到近亲繁殖在植物杂交时引起“不育”的现象。达尔文在他的名著《物种的起源》一书中谈到:“无论在植物或动物,我们又有最明显的证据,证明同种而有相当差异的个体,进行杂交,可使它们后代的生活力和能育性增强,而最亲近亲属之间的近亲交配,若连续几代而生活条件不变,则几乎必引致形体的减小、衰弱或不育”。并且指出:“都是雄性生殖质最容易受到影响”。这位十九世纪伟大的生物学家,还把植物界中的远缘和极近亲交配的不结实性称为“两端绝对不孕”。达尔文在这里指出的是生物界进化和退化的一条基本规律,也是我们在研究甜菜雄性不育特性的产生和它们的遗传问题时所不容忽视的。
As early as Darwinian biologists have noticed that inbreeding causes “infertility” when plants cross. In his famous book, The Origins of Species, Darwin mentions: “We have the most obvious evidence, both in plants and animals, that individuals of the same species, who are quite different, can make their offspring live by crossing Strength and fertility increase, and the close relatives of the kinship between relatives, if for several generations and living conditions remain unchanged, it will almost certainly lead to the reduction, weakness or infertility. ” And pointed out: “are most likely to be affected by male genitalia.” The great nineteenth century biologist also referred to the unscrupulousness of distantness and close relatives in the plant kingdom as “absolute infertility at both ends.” What Darwin pointed out here is a basic law of evolution and degradation in the biological world. It is also something we should not neglect in studying the production of sugar beet male sterility traits and their genetic problems.