Postzygotic barriers

Embryo rescue is an in vitro technique that has been used to save the hybrid products of fertilization when they might otherwise degenerate. Embryo culture applied to practical problems is a tissue culture technique that has proven to be of greatest value to breeders. One of the main uses of this technique is to produce interspecific and intergeneric hybrids. Post-zygotic barriers such as endosperm abortion and embryo degeneration leading to low fertility have been overcome through the use of embryo culture and several hybrids have been developed in horticultural crops.

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Chapter 14 - The origin of species. This chapter define and discuss the limitations of the four species concepts, describe and provide examples of prezygotic and postzygotic reproductive barriers, distinguish between and provide examples of allopatric and sympatric speciation, explain how polyploidy can cause reproductive isolation, define the term hybrid zone and describe three outcomes for hybrid zones over time.

93p shiwo_ding2 03-04-2019 21 1   Download

This chapter define and discuss the limitations of the four species concepts, describe and provide examples of prezygotic and postzygotic reproductive barriers, distinguish between and provide examples of allopatric and sympatric speciation, explain how polyploidy can cause reproductive isolation, define the term hybrid zone and describe three outcomes for hybrid zones over time.

23p nomoney10 04-05-2017 38 2   Download

Chapter 24 introduce to the origin of species. This chapter define and discuss the limitations of the four species concepts, describe and provide examples of prezygotic and postzygotic reproductive barriers, distinguish between and provide examples of allopatric and sympatric speciation, explain how polyploidy can cause reproductive isolation, define the term hybrid zone and describe three outcomes for hybrid zones over time.

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