Inter specific incompatibility, Biology

Assignment Help:

Inter specific Incompatibility

This type of incompatibility is characterized by the prevention of fusion of gametes between members of different species. The incompatibility factors also operate after fertilization and cause eventual breakdown and failure of embryo development. The factors that prevent seed set following inter specific crosses have not been worked out. It is however apparent that rejection reaction may operate at any level. In Petunia the morphological abnormalities of the pollen tube are similar in both self and inter-generic incompatibility.

The inhibition may result from unilateral incompatibility, or incongruity or a passive rejection may operate. Inter specific incompatibility involves non-proteinaceous substances besides the stigma surface proteins. Phenolics and carbohydrates also seem to play an important role. It is believed that more than one gene at different loci controls the inter specific incompatibility. In crosses between incompatible species either fertilisation does not occur or the hybrid embryo aborts due to either inadequate development of endosperm or lack of support from endosperm.


Related Discussions:- Inter specific incompatibility

Which is used to refer iron-containing in muscle cells, In biological studi...

In biological studies which of the below is used to refer to iron-containing, oxygen-binding, conjugated protein complex present in sarcoplasm of muscle cells? a) Myelin b)

Explain fixed performance system in oxygen therapy, Explain fixed performan...

Explain fixed performance system in oxygen therapy? Fixed Performance Systems: These devices are capable of delivering a fixed, preset concentration of oxygen regardless of t

Protein percentage in lowry method, How to calculate protein percentage in ...

How to calculate protein percentage in Lowry method? Ans) By verification of optical density by coloimetric method

Why hydrogen is more stable, Select all that are true/correct: Stable atoms...

Select all that are true/correct: Stable atoms have no vacancies in their outer shell. Hydrogen is more stable than carbon Helium is more stable than carbon Helium is more stable t

Procedures for diagnosis - isolation of etiological agent, Isolation and id...

Isolation and identification of the etiological agent: Isolation of the etiological agent is attempted in chicken embryos, cell cultures, laboratory animals, culture medi

Define conical flask - nutritional biochemistry, Define Conical Flask - Nut...

Define Conical Flask - Nutritional Biochemistry Conical flask is a piece of chemistry laboratory equipment, a container often made of glass, which has a narrow cylindrical mout

Fruits why not glucose, Sucrose is commonly used to preserve fruits why not...

Sucrose is commonly used to preserve fruits why not glucose? Ans) Glucose is reactive due to its open-chain form having an aldehyde group.

Determine the term - language abilities, Determine the term -  Language Ab...

Determine the term -  Language Abilities The study of aphasia and acquired language disorders was one of the driving forces in the growth of neuropsychology in this century. Th

Digestive system in planarias, Q. How are nutrients distributed through the...

Q. How are nutrients distributed through the digestive system in planarias? Planarias have single opening digestive system incomplete with ramifications that transport nutrient

Results-pulmonary valve disease, Results :  In critical pulmonary stenosis...

Results :  In critical pulmonary stenosis in infancy, surgical mortality is 6 per cent. For children and adults with isolated pulmonary valve stenosis, the mortality approaches 0

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd