Plant and Animal Breeding 3.2 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What characteristics are needed for sustainable food sources

A

Higher yield; Higher nutritional values; Resistance to disease and pests; Ability to grow in particular environments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are plant field trials

A

Enables the comparison of performances of different cultivars or treatments and to evaluate GM crops. Often carried out in a range of environments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How do you get a successful field trial

A

Randomisation of treatments; number of replicates; selection of treatments; repeats in other environments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is randomisation of treatments good

A

To prevent bias existing in the system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Selection of treatments

A

With one variable factor, a fair comparison could be made

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why is the number of replicates important

A

To take experimental error (uncontrolled variability) into account

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Why should field trials be repeated in other environments

A

Without it the conclusion may be limited, they find out which soil type and climate conditions suit the plant best

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is inbreeding

A

When closely related organisms breed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are issues of inbreeding

A

Increased frequency of individuals homozygous for recessive deleterious alleles; consequent reduction in survival to reproduction ages; inbreeding depression is the resultant effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is inbreeding depression

A

The accumulation of recessive, deleterious and homozygous alleles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is cross breeding

A

Different breeds of animals crossed to produce improved characteristics in the cross-bred population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are F1 Hybrids

A

Different imbred lines of plants can be crossed to produce a relatively uniform heterozygous crop. They show increased vigour (disease resistance and growth rate) and yield.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why are F1 Hybrids not usually bred together

A

The F2 produced shows too much variation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly