Haploid production, Biology

Assignment Help:

Haploid Production

The higher plants are normally diploid, with two sets of chromosomes in their somatic cells. Their haploids (with one set of chromosomes) arise in nature by parthenogenesis due to malfunction in the normal sexual process. However, such events are extremely rare and unpredictable. In 1964, two Indian scientists, Guha and Maheswari, observed that in cultured anthers of Datura innoxia some of the microspores, instead of following the normal gametophytic mode of development, formed sporophytes (Androgenic plants).

As expected, those sporophytes were haploid. This report caused much excitement because of the considerable importance of haploids in genetics and plant breeding. To-date androgenic haploids of over 200 species, including many major crop plants (Cereals, Brassica spp, tomato and potato), have been raised through anther and/or isolated pollen culture.


Related Discussions:- Haploid production

Determine cdna encodes aba 8-hydroxylase activity, Hypothetical question. ...

Hypothetical question. A new biotech company intends to clone the gene encoding the ABA 8-hydroylase enzyme, an important protein regulating plant hormone degradation that control

Explain spermatocyte I and spermatocyte II, What is the difference between...

What is the difference between spermatocyte I and spermatocyte II? The spermatocyte I (2n) undergoes the primary division of meiosis (meiosis I) originating two spermatocyte II

Partial pericardiectomy-pericardial effusion, Partial Pericardiectomy :  ...

Partial Pericardiectomy :  The approach can be either by a left anterolateral thoracotomy or median sternotomy. For pyogenic pericarditis with adhesions and loculations a par

Define intentional adulteration - types of adulteration, Define Intentional...

Define Intentional Adulteration - Types of Adulteration? In intentional adulteration, the substance is added, removed or substitute knowingly by the adulterator for the purpose

Give three examples of artificial selection, Give three examples of artific...

Give three examples of artificial selection. Include examples of both animals and plants.  Answers will vary, but could include domestic cats, domestic dogs, cattle, sheep, an

Define functions of copper, Define Functions of Copper? Copper serves a...

Define Functions of Copper? Copper serves as a co-factor, as well as, an allosteric component of enzymes. In many enzymes copper functions as an intermediate in electrno transf

Adaptations in skeleton for upright posture, ADA PTATIONS IN SKELETON FOR ...

ADA PTATIONS IN SKELETON FOR UPRIGHT POSTURE - 1.      Foramen magnum is directed downward so that the head may rest vertically on the vertebral column. 2.      Four curves

Guidelines for diabetic patients for healthy coping, Q. Guidelines for Diab...

Q. Guidelines for Diabetic Patients for Healthy Coping? Generally, a diabetic patient adapts to day to day stress effectively, as they accept their disease condition with the s

Define species of biological species concept, Define species according to t...

Define species according to the biological species concept. What two problems often make this definition impractical?

How many asymmetric carbons ribose has, How many asymmetric carbons are the...

How many asymmetric carbons are there in ribose and glucose?

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