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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?
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?
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?
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?
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?
Which insect is a serious problem for cotton in all producing countries?
Which insect is a serious problem for cotton in all producing countries?
What trait has been found to significantly reduce the attractiveness of cotton plants to insects that rely on the carbohydrate source provided by nectar?
What trait has been found to significantly reduce the attractiveness of cotton plants to insects that rely on the carbohydrate source provided by nectar?
What is the term used to describe the condition in cotton that produces a narrowed strap-like bract turned away from the floral boll?
What is the term used to describe the condition in cotton that produces a narrowed strap-like bract turned away from the floral boll?
In cotton, what has been found to reduce the numbers of pink bollworm?
In cotton, what has been found to reduce the numbers of pink bollworm?
What is the effect of the occurrence of hairs on foliar and stem surfaces in cotton?
What is the effect of the occurrence of hairs on foliar and stem surfaces in cotton?
What may breeders need to choose between when dealing with resistance in cotton?
What may breeders need to choose between when dealing with resistance in cotton?
What breeding method is used to transfer single, multiple, additive genes into commercial varieties?
What breeding method is used to transfer single, multiple, additive genes into commercial varieties?
Which insect has a major preference for maize and a short life cycle of 1-2 months?
Which insect has a major preference for maize and a short life cycle of 1-2 months?
What method may result in resistant varieties through induced mutation?
What method may result in resistant varieties through induced mutation?
In which countries has the Fall Army Worm significantly affected maize production?
In which countries has the Fall Army Worm significantly affected maize production?
Which method involves breeding with monogenic inheritance to transfer resistant genes in commercial varieties?
Which method involves breeding with monogenic inheritance to transfer resistant genes in commercial varieties?
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.
