Question

Which of the followings is a correct match between crop, variety and resistance to diseases?

| Crop| Variety| Resistance to disease
---|---|---|---
A.| Wheat | Himgiri | White rust
B.| Brassica| Pusa Sadabahar| Black rot
C. | Cowpea| Pussa komal | Bacterial blight
D.| Chilli| Pussa swarnim| Chilly mosaic virus

a. A
b. B
c. C
d. D

Answer 1

Resistance is a term used to define the prevention of someone or something, in terms of resistance to disease, when a plant or crop has the ability to prevent itself from virus or bacterial infection, such plants or crops are known as disease resistance plants. This kind of crop is produced by DNA recombinant technology or Genetic engineering.

Complete answer:
Transgenic plants or crops are those which carry additional stable integrated and expressed foreign genes of trans species. The whole process of transgenic plant development involving introduction, integration and expression of a foreign gene in the host is called genetic transformation The combined use of Recombinant DNA technology and tissue culture technique has led to the efficient transformation and production of transgenic in a wide variety of Crop plants.

Unlike classical breeding, only the cloned genes of agronomic importance are being introduced without cotransfer of another undesirable gene from the donor. The recipient genotype is least distributed and there is no need for repeated backcrosses. This will serve as an effective means of removing certain specific defects of other well-adapted cultivars. The development of a disease-resistant plant or crop is the best application for this technique.

Many crops have become disease free though genetic engineering technology like a wheat crop of himgiri variety is hill bunt resistance, Brassic variety Pusa swarnim is white rust resistance, Pusa Komal variety of Cowpea crop is bacterial blight disease resistance, Pusa sadabahar variety of chili is mosaic resistance.

From the above discussion, Crop- Cowpea, variety Pusa Komal, resistance disease bacterial blight
Hence, the correct answer is option (B).

Note: Through genetic engineering, it is possible to develop an insect’s resistant crops. Several different strategies have been used to confer resistance against insect predators. A gene (cry I) encodes insecticidal protoxin produced by one of several subspecies of the bacterium Bacillus thuringiensis. When a copy of the Bt gene or cry I from Bacillus thuringiensis transfer into a crop through genetic engineering, that crop becomes insect resistant Eg; Bt cotton.