Plant Breeding

Breeding for disease resistance requires

• a good source of resistance

• Planned hybridisation

• Diseases test

• all of these

Polyploidy is induced through

• Irradiation

• Mutagenic chemicals

• Ethylene

• Colchicine

The quickest method of plant breeding is

• introduction

• Selection

• Hybridisation

• Mutation Breeding

The new varieties of plants are produced by

• Introduction and mutation

• Selection and hybridisation

• Mutation and Selection

• Selection and Introduction

Pure line breed refers to

• heterozygosity only

• homozygosity only

• homozygosity and self assortment

• heterozygosity and linkage

A scientist wants to study the viral effects on plants. Which of the following part of the plant should be excluded?

• pith

• shoot apex

• phloem

• cortex

Somatic hybridisation is achieved through

• Grafting

• Conjugation

• Protoplast fusion

• Recombinant DNA technology

Bagging is done to

• Avoid cross pollination

• Avoid self pollination

• Achieve desired pollination

• Prevent contamination from foreign pollen

A technique of micropropagation is

• Multiple root production

• Somatic embryogenesis

• Growth of micro organisms on culture medium

• Multiple shoot production and embryo rescue

A technique of micropropagation is

• Multiple root production

• Somatic embryogenesis

• Growth of micro organisms on culture medium

• Multiple shoot production and embryo rescue