Nassar N M
Departamento de Genetica e Morfologia, Universidade de Brasilia, Brazil.
Hereditas. 2001;134(2):185-7. doi: 10.1111/j.1601-5223.2001.00185.x.
Apomixis in cassava is formed by aposporic embryo sacs which arise from cells in nucellus or from cells in the sexual embryo sac. There is an association between sterility and apomixis. It seems that sterility caused by defected meioses triggers a specific gene for exhibiting apomixis. This apomictic mechanism is favoured by natural selection since it offers an escape from lethality and provides a perpetuation of the current genotype.
木薯的无融合生殖由无孢子生殖胚囊形成，这些胚囊起源于珠心细胞或有性胚囊中的细胞。不育与无融合生殖之间存在关联。似乎由减数分裂缺陷导致的不育会触发一个特定基因来表现无融合生殖。这种无融合生殖机制受到自然选择的青睐，因为它提供了一种避免致死性的途径，并使当前基因型得以延续。
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