Tag: plant breeding

Quizzes (8) Questions (81)

Questions Related to plant breeding

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Yellow mosaic virus resistant variety $Parbhani$ $Kranti$ belongs to __________.

  1. Bhindi

  2. Barley

  3. Chilli

  4. Cauliflower
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Parbhani Kranti is a well-known variety of Bhindi (okra) developed through mutation breeding specifically for resistance to the Yellow Mosaic Virus. The other options listed are not associated with this specific variety.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Exchange of germplasm is carried mostly through shoot tips because it is

  1. Cheap

  2. Small and handy

  3. Virus free

  4. Genetically stable
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Shoot tip culture maintains virus free plant. It is used for international exchange of germplasm is vegetatively multiplied cultivars, e.g., Banana, Potato.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Any organism that damages the economic and physical well-being of humans is called

  1. Exoparasite

  2. Commensal

  3. Parasite

  4. Pest
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

competes with humans, domestic animals, or desirable plants for food or An organism should not be considered a pest until it is proven to be one. The economic losses caused by pest damage, if the pest population continued to or component sharing the site usually affect the actions and well-being of many others. So, the correct option is "D" (Pest).

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Pusa Gaurav variety resistant to insect pest developed by hybridization and selection belong to:

  1. Flat bean

  2. Okra

  3. Rapeseed mustard

  4. Wheat
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
 CROP VARIETY  INSECT PESTS 
Brassica (rapeseed mustard)   Pusa Gaurav   Aphids. 

So, the correct option is 'rapeseed mustard'

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Pyrilla is a

  1. A character of ancient Greek mythology

  2. An insect pest

  3. Disease of teeth and gums

  4. A building heated by solar energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Pyrilla is the most destructive foliage-sucking pest of sugarcane. Heavy rainfall followed by 75-80% humidity, intermittent drought periods, high temperature (26-300c) and wind movement favours rapid build-up of the pest. Cane yield loss is about 28% while 1.6% unit loss in sugar content. Due to continuous desapping by large number of hoppers, top leaves in the affected canes dry up and lateral buds germinate. The hoppers exude a sweet sticky fluid known as honeydew, which promotes quick and luxuriant growth of the fungus, capanodium species and as a result the leaves are completely covered by the sooty mould.
So the correct option is 'an insect pest'.
Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

In which of the following plant due to the presence of High aspartic acid, low nitrogen, this plant leads to resistance for stem borers. 

  1. Cotton

  2. Sugar cane

  3. Maize

  4. Wheat
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A.Cotton – Smooth leaved and nectar less cotton varieties do not attract bollworms

B.Sugar cane – Saccharum barberi is crossed with Saccharum officinarum, the newly formed varieity shows the desirable qualities of high yield, thick stems, high sugar and ability to grow.

C.Maize – High aspartic acid, low nitrogen and sugar content in maize leads to resistance to maize stem borers.

D.Wheat – Solid stems lead to non preference by the stem sawfly.

So, the correct answer is ‘Maize’.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

What is a clone?

  1. A heterozygote produced by sexual means.

  2. A homozygote produced by asexual means.

  3. A heterozygote produced by asexual means.

  4. A homozygote produced by sexual means.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Clone is a group of plants produced from a single plant through asexual reproduction or progeny of single plant obtained by asexual reproduction is known as clone.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Who used x-rays for the production of mutations?

  1. Muller

  2. Leeuwenhoek

  3. Virchow

  4. Hooker
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The mutagenic property of mutagens was first demonstrated in 1927, when Hermann Muller discovered that x-rays can cause genetic mutations in fruit flies, producing phenotypic mutants as well as observable changes to the chromosomes. His collaborator Edgar Altenburg also demonstrated the mutational effect of UV radiation in 1928. 

Muller went on to use x-rays to create Drosophila mutants that he used in his studies of genetics. Thus, the correct answer is option A.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

A gene bank is a place where valuable plant material is preserved in viable condition. Gene banks are parts of

  1. In-situ conservation

  2. Ex-situ conservation

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gene banks are a type of biorepository which preserve genetic material. For plants, this could be by freezing cuttings from the plant or stocking the seeds (e.g., in a seedbank). For animals, this is the freezing of sperm and eggs in zoological freezers until further need. With corals, fragments are taken which are stored in water tanks under controlled conditions. Plant genetic material in a 'gene bank' is preserved at -196 celsius in liquid nitrogen as mature seed dry. In plants, it is possible to unfreeze the material and propagate it, however, in animals, a living female is required for artificial insemination. While it is often difficult to utilize frozen animal sperm and eggs, there are many examples of it being done successfully. Ex-situ conservation of plant genetic resources can be achieved through different methods such as seed banks, field gene banks, in-vitro storage methods, pollen banks and DNA banks. Thus, the correct answer is option B.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Cultivated tobacco, Nicotine tobacco has $2n=48$ chromosomes and is amphidiploids. Nicotine Sylvester's which one of the progenitors of Nicotine tobacco has $2n=24$ chromosomes and is diploid. It has contributed one genome to Nicottama tobacco. When these two species are hybridized, the critical chromosomal associations at meiosis in the hybrid will be.

  1. $24$ bivalents
  2. $12$ univalent
  3. $12$ bivalents
  4. $12$ bivalents $+12$ univalent
Reveal answer Fill a bubble to check yourself
D Correct answer