Insect Resistance Breeding Quiz

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Questions and Answers

Which species of Gossypium sp is an important fiber crop and a source of cooking oil and high-quality protein for animals?

G. hirsutum (correct)

G. barbadense

G. arboreum

G. herbaceum

What is the term used to describe resistance in which the plant is not suitable as a host for the insect?

Anli biosis

Antixenosis (correct)

Tolerance

Antibiosis

Which of the following phytochemicals confers resistance to Corn to ear worm in maize?

C-glycosyl flavones (e.g. maysin) (correct)

Spiny bollworm

Pink bollworm

Cotton white fly

What is the term used to describe resistance in which the plant is able to withstand damage or recover from damage caused by insect populations?

Tolerance Signup and view all the answers

Which insect is a serious problem for cotton in all producing countries?

American bollworm Signup and view all the answers

What trait has been found to significantly reduce the attractiveness of cotton plants to insects that rely on the carbohydrate source provided by nectar?

Lack of nectar-producing glands Signup and view all the answers

What is the term used to describe the condition in cotton that produces a narrowed strap-like bract turned away from the floral boll?

Frego Signup and view all the answers

In cotton, what has been found to reduce the numbers of pink bollworm?

Absence of hairs called glabrousness Signup and view all the answers

What is the effect of the occurrence of hairs on foliar and stem surfaces in cotton?

Increased attractiveness to insects Signup and view all the answers

What may breeders need to choose between when dealing with resistance in cotton?

Gaining resistance for one pest while sacrificing resistance to another Signup and view all the answers

What breeding method is used to transfer single, multiple, additive genes into commercial varieties?

Hybridization Signup and view all the answers

Which insect has a major preference for maize and a short life cycle of 1-2 months?

Fall army worm Signup and view all the answers

What method may result in resistant varieties through induced mutation?

Mutation breeding Signup and view all the answers

In which countries has the Fall Army Worm significantly affected maize production?

Nigeria, Ghana, Kenya Signup and view all the answers

Which method involves breeding with monogenic inheritance to transfer resistant genes in commercial varieties?

Back cross methods Signup and view all the answers

Study Notes

Cotton and Insect Resistance

Gossypium sp is an important fiber crop and a source of cooking oil and high-quality protein for animals.
Non-preference is the term used to describe resistance in which the plant is not suitable as a host for the insect.
Maysin is the phytochemical that confers resistance to Corn to earworm in maize.

Types of Insect Resistance

Tolerance is the term used to describe resistance in which the plant is able to withstand damage or recover from damage caused by insect populations.

Cotton Pests and Resistance

The pink bollworm is a serious problem for cotton in all producing countries.
The absence of nectar production has been found to significantly reduce the attractiveness of cotton plants to insects that rely on the carbohydrate source provided by nectar.
The condition in cotton that produces a narrowed strap-like bract turned away from the floral boll is known as "okra leaf".
High-density planting has been found to reduce the numbers of pink bollworm.
The occurrence of hairs on foliar and stem surfaces in cotton has been found to reduce insect damage.

Breeding for Resistance

Breeders may need to choose between vertical and horizontal resistance when dealing with resistance in cotton.
Backcross breeding is used to transfer single, multiple, additive genes into commercial varieties.
Induced mutation may result in resistant varieties through radiation or chemical mutagenesis.

Other Insect Pests

The Fall Army Worm has a major preference for maize and a short life cycle of 1-2 months.
The Fall Army Worm has significantly affected maize production in countries such as Nigeria, Kenya, and Ghana.

Breeding Methods

Backcross breeding involves breeding with monogenic inheritance to transfer resistant genes in commercial varieties.

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Description

Test your knowledge on breeding for insect resistance with this quiz. Learn about the biology of plant crops and pests, insect rearing techniques, genetic and biotechnology tools, and the categories of resistance in insect breeding.