词汇 | self-fertilization |
释义 | self-fertilization noun[ U ] biology specialized(UK usuallyself-fertilisation)uk /ˌself.fɜː.tɪ.laɪˈzeɪ.ʃən/ us /ˌself.fɝː.t̬ə.ləˈzeɪ.ʃən/ the process in which a seed or egg starts developing into a new plant or animal after joining with a male cell from the same plant or animal, rather than a different one 自株传粉,自花受精 Plant reproduction anther asexual reproduction asexuality asexually barrenness breeder chasmogamous endosperm germinate palynology pistillate placentation pollinate pollination self-incompatible self-pollination sexlessly siltation sporangium stamen You can also find related words, phrases, and synonyms in the topics: Animal reproduction Related wordself-fertilize Examples of self-fertilizationself-fertilization The evolution of self-fertilization and inbreeding depression in plants. No progeny were identified as the products of self-fertilization in this population. Broadly speaking, greater self-fertilization decreases element number under deleterious insertion and increases element number with regulation through ectopic exchange. However, self-fertilization should be interpreted cautiously with respect to only 8 loci in a relatively small number of individuals analysed. Such expectations are badly needed to built realistic models of the evolution of self-fertilization. In order for reproduction by self-fertilization to evolve, the advantages must outweigh any possible disadvantage of inbreeding. The genetic variability is therefore expected to be halved in populations with very high frequencies of self-fertilization. Also, self-fertilization, as mentioned above, is expected to promote local population differentiation. Suppose the offspring is to be produced through self-fertilization. Some reproductive factors affecting the selection of self-fertilization in plants. Animals mix it up too: the distribution of self-fertilization among hermaphroditic animals. Eggs are produced by self-fertilization (most trematodes are hermaphroditic), bypassing the need for the worm to mature in a definitive host. Outbreeding, self-fertilization, gynogenesis and triploidy would influence the recombination of alleles between individuals and hence the degree of genetic diversity generated by each fluke. Under these circumstances, homozygosity associated with self-fertilization is ineffective at reducing average element number. Expectations for inbreeding depression on self-fertilization of tetraploids. See all examples of self-fertilization These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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