Tag: method of plant breeding for crop improvement

Questions Related to method of plant breeding for crop improvement

Majority of improved Indian Rice varieties have arisen from a cross between

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Oryza sativa indica $\times$ Oryza nivara

  2. Oryza sativa indica $\times$ O. sativa japonica

  3. O. sativa japonica $\times$ O. nivara

  4. O. rufipogon $\times$ O. nivara.

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Correct Option: B

Aim of plant breeding is to

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Control pollution

  2. Keep soil fertile

  3. Produce improved varieties

  4. To maintain wild plants

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Correct Option: C

Four inbred/pure lines of Maize are crossed. The cross is

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Double cross

  2. Dihybrid cross

  3. Tetrahybrid cross

  4. Tetraploid cross

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Correct Option: C

A cybrid is hybrid carrying

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Genomes and cytoplams of two different plants

  2. Cytoplasms of two different plants

  3. Cytoplasms of two different plants but genome of one plant

  4. Genomes of two different plants

  5. Cytoplasms of several plants but genomes of two plants.

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Correct Option: C

Branch of biology dealing with improvement of plant variety

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Eugenics

  2. Plant breeding

  3. Agrology

  4. Serendipity

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Correct Option: B

From which technique, new and better varieties of crop plants are formed

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Selection

  2. Hybridisation

  3. Grafting

  4. Hybridisation followed by selection.

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Correct Option: D

During hybridisation, offspring with hybrid vigour superior to both parents are self pollinated for a few successive generations to .............

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Retain their parental characters

  2. Remove their parental characters

  3. Get homozygosity

  4. Segregate characters.

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Correct Option: C

During somatic hybridisation in plants

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Somaclones are produced in large numbers

  2. Apical meristems are cultured to get virus-free plant

  3. Cell walls and middle lamella are digested before fusing the cells

  4. Crop plants with higher levels of vitamins, proteins, and minerals are hybridised.

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Correct Option: C

For hybridisation, which part is removed from bisexual flowers

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Stigma

  2. Stigma and style

  3. Anthers

  4. Ovary.

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Correct Option: C

Consider the following statements: Hybrid plants can show.
a. Sterility
b. Mosaicism
c. Crossing over
d. Vigour
e. Homozygosis
Which of the statements are correct?

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. $2, 3$ and $5$

  2. $2, 4$ and $5$

  3. $1, 2$ and $4$

  4. $1, 3$ and $4$

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Correct Option: A