Androgenic haploids, Biology

Assignment Help:

Androgenic haploids

Androgenic haploids of some species, such as wheat, mustard and tobacco, can also be raised through isolated microspore pollen culture (Pollen cultures). It must be realized that in spite of serious efforts androgenic haploids have not been possible in many other economically important plants. In-vitro gynogenesis is another approach to produce haploids (Yang and Zhou, 1990). In this technique unfertilized ovules are cultured on media which stimulate the egg (parthenogenesis) or any other haploid cell of the embryo sac (apogamy) to undergo embryogenic development without fertilization. In-vitro gynogenesis, first observed in Hordeum vulgare by San Noeum (1967), has now been reported in at least 16 species. This technique of haploid production is especially useful in plants in which the androgenic response is unsatisfactory, a large proportion of pollen plants are non-haploids or albinos, as in many cereals.

 


Related Discussions:- Androgenic haploids

Define physical activity as a factor for obesity, Define Physical activity ...

Define Physical activity as a factor for obesity? Sedentary life style with lack of an exercise schedule tends to make one obese. As we approach middle age, our physical activi

Define intra enterocyte transport - non-haem iron absorption, Define Intra ...

Define Intra enterocyte transport - non-haem iron absorption? Intra enterocyte transport: In the enterocyte, the absorbed iron can have one of the following metabolic fates:

Explain the manifestations of iron deficiency anaemia, Explain the Manifest...

Explain the Manifestations of Iron Deficiency Anaemia? • Paleness of conjunctiva • Paleness of tongue • Paleness of mucosa of soft palate • Low haemoglobin • Swelling of

Is the epithelium vascularized, Q. Is the epithelium vascularized? How do o...

Q. Is the epithelium vascularized? How do oxygen and nutrients reach the epithelium? Why is this feature an important evolutionary acquisition? Epithelia are not vascularized c

Types of xerophytes, Types of  xerophytes On the basis of their mbrpho...

Types of  xerophytes On the basis of their mbrphology, physiology and life cycle pattern, xerophytes are generally classified into the following three categories: a) Ephem

Most common opportunistic diseases in aids, Q. Moniliasis is one of the mos...

Q. Moniliasis is one of the most common opportunistic diseases in AIDS. What is the etiological agent of moniliasis and what is the other name of the disease? Why is monilia also c

Assignment of botany, habitat, habit, cell wall chemistry, reason why cell ...

habitat, habit, cell wall chemistry, reason why cell wall like this of Archaebacteria , eubacteria,fungi,algae,bryophytes ,pteridophyes, gymnosperms , angiosperms..

Pisces, examples of pisces

examples of pisces

Define features of male and female ascaris lumbricoides, Define Features of...

Define Features of male and female ascaris lumbricoides? i)  Ascaris  lumbricoides is  commonly called  round worm. ii)  Body  is elongated, cylindrical,  tapering at  bot

Two traits are involved in a genetic cross, In his experiments, Mendel note...

In his experiments, Mendel noted that when two traits are involved in a genetic cross, they are inherited independently of each other. The reason for this is that A. genes on the s

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