Question

Match Column-I with column-II and select the correct answer using the codes given below.

	Column-I		Column-II
A.	Usage of bisexual flowers as female parents.	I.	Clonal selection
B.	Incorporation of several desirable characters into a single variety.	II.	Emasculation
C.	Exploiting hybrid vigour for many generations.	III.	Emasculation
D.	Improving local varieties of self-pollinated crops.	IV.	Hybridisation
E.		V.	Polyploidy breeding

A) A-IV; B-V; C-III; D-I
B) A-II; B-III; C-IV; D-V
C) A-III; B-IV; C-I; D-II
D) A-I; B-V; C-II; D-IV

Answer 1

Hint: Artificial hybridisation is one of the major approaches of cropimprovemen programmes. In such crossing experiments it is important to make sure that only the desired pollen grains are used for pollination and the stigma is protected from contamination( from unwanted pollen). This can be done by emasculation and bagging techniques.

Complete step-by-step answer:

I	II
A)Use of bisexual flowers as female  flowers	Emasculation
B)Incorporation of several desirable characters into a single variety	Hybridization
C)Exploiting hybrid vigor for several generations	Clonal Selection
D)Improving local varieties of self-pollinated plants	Pure line selection

If the female parent bears bisexual flowers, removal of anthers from the flower bud before the anther dehisces using a pair of forceps is necessary and this is called emasculation. Hybridization is the process in which genetic engineering is used to introduce desired genes in our plant. Clonal selection is the process in which superior clones are selected from a mixed population of asexually propagating crops. Pure line selection is the process in which we select and breed the progeny that is from superior organisms for a no. of generations upto which we get desired characteristics in the organism.
So the correct answer is option C

Note: Majority of flowering plants produce hermaphrodite flowers and pollen rains are likely to come in contact with stigma of the same flower. Continued self pollination results in inbreeding depression.