Tag: method of plant breeding for crop improvement

Questions Related to method of plant breeding for crop improvement

Which of the following is incorrectly paired?

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

  1. Wheat - Himgiri

  2. Milch - Sahiwal

  3. Rice - Ratna

  4. Pusa Komal - Brassica

Show answer
Correct Option: D
Explanation:

Pusa Komal is a variety of cowpea (Vigna unguiculata). Developed by IARI, New Delhi and is resistant to bacterial blight diseases. It belongs to family Fabaceae.

So, the correct answer is 'Pusa Komal - Brassica'

Resistance to $jassids$ in cotton plants and to cereal leaf beetle in wheat plants is due to _____________.

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

  1. Biochemical characters

  2. Physiological characters

  3. Morphological characters

  4. None of these

Show answer
Correct Option: C

Hairy leaves of many plants are associated with ________________.

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

  1. Resistance to insect pests

  2. Resistance to viruses

  3. Resistance to fungi

  4. Resistance to bacteria

Show answer
Correct Option: A

Which of the following statements is correct regarding nectarless cotton varieties?

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

  1. They do not attract stem sawfly

  2. They are produced by mutation breeding

  3. They do not attract bollworms

  4. They attract cereal leaf beetle.

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Correct Option: C

Maize generates resistance against stem borers by having ___________________.

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

  1. Low aspartic acid, high nitrogen and sugar content

  2. Low aspartic acid, sugar but high nitrogen content

  3. Low aspartic acid, nitrogen but low sugar content

  4. Low aspartic acid, low nitrogen and sugar content

Show answer
Correct Option: D

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

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

  1. Bhindi

  2. Barley

  3. Chilli

  4. Cauliflower

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Correct Option: A

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

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

  1. Cheap

  2. Small and handy

  3. Virus free

  4. Genetically stable

Show answer
Correct Option: C
Explanation:

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

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

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

  1. Exoparasite

  2. Commensal

  3. Parasite

  4. Pest

Show answer
Correct Option: D
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).

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

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

  1. Flat bean

  2. Okra

  3. Rapeseed mustard

  4. Wheat

Show answer
Correct Option: C
Explanation:
 CROP VARIETY  INSECT PESTS 
Brassica (rapeseed mustard)   Pusa Gaurav   Aphids. 

So, the correct option is 'rapeseed mustard'

Pyrilla is a

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

  1. A character of ancient Greek mythology

  2. An insect pest

  3. Disease of teeth and gums

  4. A building heated by solar energy

Show answer
Correct Option: B
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'.