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Kst538: Host Plant Resistance To Biotic And Abiotic Stress Question Paper

Kst538: Host Plant Resistance To Biotic And Abiotic Stress

Course:Master Of Science In Agribusiness Management

Institution: Kenyatta University question papers

Exam Year:2012

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2011/2012
SECOND SEMESTER EXAMINATION FOR THE DEGREE OF MASTER
OF SCIENCE IN PLANT BREEDING
KST 538: HOST PLANT RESISTANCE TO BIOTIC AND ABIOTIC
STRESS
===============================================================
DATE: THURSDAY 29TH MARCH 2012
TIME: 2.00 P.M. – 5.00 P.M.

INSTRUCTIONS
Answer any four questions.

1.
Explain the main features of preference / non preference mechanism of resistance and
show how cultivars could be evaluated for this resistance

(15 marks)

2.
Transgenic plant technology will revolutionize our abilities to address host plant
resistance. Discuss its advantages and disadvantages.

(15 marks)

3.
Host plant resistance to stresses is said to be team research. Explain who should
constitute the team as primary and secondary members.

(15 marks)

4.
Discuss the differences between active and passive resistance.

(15 marks)

5.
Breeding crops that are tolerant to drought is complicated by the variability in the
occurrence or presence of this stress. Discuss the procedure of screening maize lines
for tolerance to the stress.

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