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

Coevolution of plant-herbivores, There has been a perfect coevolution betwe...

There has been a perfect coevolution between plants and herbivorous animals. This has often developed into a mutually beneficial relationship. Whereas the plants have proved to be

Are protozoans presenting pulsatile, Q. Are protozoans presenting pulsatile...

Q. Are protozoans presenting pulsatile or contractile vacuoles easily found in fresh or in salt water? Fresh water is the less concentrated of solutes than sea water and it fre

Absolute time, Absolute time is one of the two types of geologic time (rel...

Absolute time is one of the two types of geologic time (relative time being the other), with the distinct age date established generally by the decay of the radioactive elements,

Define natural gums - hydrocolloids, Natural Gums These are derived fro...

Natural Gums These are derived from various plant as well as microbial sources and are divided into the following four basic categories: 1.  Seaweed gums:   Agar, Alginate,

What are the benefits of soil testing, What are the benefits of Soil testin...

What are the benefits of Soil testing Soil testing is done to assess the nutrient supplying capacity of the soil. The data obtained as a result of  testing is useful for recom

Biologyical problem, Ask question #Minimum 100 hhejejhjehjwords accepted#

Ask question #Minimum 100 hhejejhjehjwords accepted#

Help, about how humans survive and reproduce currently. In your journal, wr...

about how humans survive and reproduce currently. In your journal, write down three adaptations that help humans have differential survivability, and three adaptations that help hu

Explain bacterial vaginosis, Bacterial vaginosis  The role of sexual tr...

Bacterial vaginosis  The role of sexual transmission is unclear in bacterial vaginosis, in which normal H2O2-producing Lactobacillus  species are replaced by overgrowth with  G

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