Question

Arrange them in the correct sequential order and select the correct option.
1.Rebagging;
2.Selection of parents;
3.Bagging;
4.Dusting the pollen on stigma;
5.Emasculation;
6.Collection of pollen from make parent.
(a)$2\rightarrow 3\rightarrow 5\rightarrow 6\rightarrow 4\rightarrow 1$
(b)$2\rightarrow 5\rightarrow 3\rightarrow 6\rightarrow 4\rightarrow 1$
(c) $5\rightarrow 2\rightarrow 3\rightarrow 6\rightarrow 1\rightarrow 4$
(d)$2\rightarrow 3\rightarrow 6\rightarrow 4\rightarrow 5\rightarrow 1$

Answer 1

Hint: An important approach to the crop improvement programme is artificial hybridisation. It is a major concern to make sure that only the desired pollen grains are used for pollination and protect the stigma from contamination from certain pollen which gives unwanted characteristics to plants.

Complete answer:
The art and science of cultivating the soil, growing crops, and raising livestock are known as agriculture. The hybridization process is achieved to involve the following steps:
- The two-parent plants are chosen for the pollination so that it has required characteristics.
-The chosen plants are left to grow with proper water and light requirements.
-Selfing or self-fertilization of parents is essential for removing the undesirable characters and obtaining inbreds.
-Emasculation is done which is the removal of stamens or anthers without the female reproductive organ being harmed. In bisexual flowers, it is done to prevent self-pollination and in monoecious plants, the male flowers are removed.
-Bagging is the process used to cover the stigma so unwanted pollen doesn’t come in contact with it.
-Tagging is a process where transposons are amplified inside a biological cell and are used to isolate genes.
-Pollination occurs and it is the process of transfer of pollen grains from the male of a flower to the female stigma.
-Harvesting, threshing, drying, and storage.
So, the correct option is ‘$2\rightarrow 5\rightarrow 3\rightarrow 6\rightarrow 4\rightarrow 1$’

Note: The benefits of such a crossing are that they are healthy, viable, and stronger (resistant) due to hybrid vigor. The pollination occurs between flowers of two different plants this results in the origin of new varieties. It helps in evolution. Undesirable characters of the plant can be eliminated, and the possibility to get new desirable characters. The seeds produced in this method are in greater quantities and are more viable.