prezygotic

prezygotic

 [pre″zi-got´ik]
occurring before completion of fertilization.

prezygotic

/pre·zy·got·ic/ (pre″zi-got´ik) occurring before completion of fertilization.

prezygotic

(prē-zī-gŏt′ĭk) [″ + zygotos, yoked]
Happening prior to fertilization of the ovum.

prezygotic

before a zygote is formed; occurring before completion of fertilization.
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References in periodicals archive ?
indirect effects of whole-genome duplication on prezygotic isolation in Chamerion angustifolium: implications for rapid speciation.
Absence of a prezygotic behavioural barrier to gene flow between the two sympatric morphs of the squat lobster Munida gregaria (Fabricius, 1793) (Decapoda: Anomura: Galatheidae).
2011a) suggested that a prezygotic explanation is more likely owing to the lack of hybrid individuals and strong Wahlund effect in areas of sympatry.
This process occurs due to differences in the acrosome and/or flagellum which produce prezygotic incompatibility (between sperms and eggs), because there are receptors located in these structures that are used for fertilization in some marine invertebrates, especially those with external fertilization (Pitnick et al.
Prezygotic barriers resulting from pollenpistil incompatibility, where pollen grain germination and pollen tube growth of one species is inhibited by the stigma of another species (BURSON & YOUNG, 1983) are quite common.
2001; Norrbom & Korytkowski 2011) and is currently known to be a complex of cryptic species (AF complex) that exhibit considerable levels of prezygotic and postzygotic reproductive isolation (Selivon et al.
This is because the sessile or sedentary nature of broadcast spawners provides little or no opportunity for prezygotic mate choice.
There is limited evidence for prezygotic pollen rejection in conifers (Runions & Owens, 1998), but clearly it could not involve cell recognition beginning at a stigma surface as in angio-ovulate plants.
In conclusion, our study demonstrates that both prezygotic and postzygotic barriers to hybridization exist between C.
Therefore, such failure in germination of the seeds from self-pollination may be due to prezygotic incompatibility mechanism.
Our results suggest that there are no mechanisms of prezygotic self-incompatibility in B.