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人教版高中生物第二册生物的变异一节中提到了人工诱导多倍体育种,学生在学习后产生浓厚的兴趣,经常问:由二倍体诱导四倍体时,会出现八培体吗?诱导出的一定是纯合体吗?针对学生的提问,下面简要介绍一下多倍体育种技术。一、概念及特点1.多倍体育种是指利用多倍体植物进行选育,获得新品种的方法。2.多倍体植物的特点:(1)巨大性。随着细胞核内染色体的加倍,使相应的细胞核、细胞以及组织器官等明显加大。一般茎粗、叶宽厚、色深、花大、色艳、果实大、种子大而少。
In the section on the biological variation of the PEP Biological Biology Book II, artificial induction of polyploids is mentioned. Students have a keen interest after learning. Frequently asked questions: When diploids are used to induce tetraploids, eight p Does it induce homozygosity? For students’ questions, here is a brief introduction to the polyploid technique. I. Concepts and characteristics 1. Polyploid breeding refers to the method of using polyploid plants for breeding and obtaining new varieties. 2. The characteristics of polyploid plants: (1) greatness. With the doubling of chromosomes in the nucleus, the corresponding nucleus, cells, and tissues and organs are significantly increased. Generally thick stems, thick leaves, deep color, large flowers, colorful, large fruit, large and small seeds.