What are the method of breeding for disease resistance in plants?

What are the method of breeding for disease resistance in plants?

Solution : The conventional method of breeding for disease resistance is selection and hybridisation.

What is durable plant resistance?

Durable disease resistance is defined as resistance that has remained effective while a cultivar possessing it has been widely cultivated in an environment favoring the disease.

Which is most important for disease resistance in plant?

Disease control is achieved by use of plants that have been bred for good resistance to many diseases, and by plant cultivation approaches such as crop rotation, pathogen-free seed, appropriate planting date and plant density, control of field moisture, and pesticide use.

How do you make plant disease-resistant?

Developing disease-resistant plants is a continuing process. Special treatments for inducing gene changes include the application of mutation-inducing chemicals and irradiation with ultraviolet light and X-rays.

What is conventional plant breeding?

Conventional breeding achieves it by crossing together plants with relevant characteristics, and selecting the offspring with the desired combination of characteristics, as a result of particular combinations of genes inherited from the two parents.

What is plant breeding describe the breeding of crop plant for disease resistance and high yielding?

Plants are crossbred to introduce traits/genes from one variety or line into a new genetic background. For example, a mildew-resistant pea may be crossed with a high-yielding but susceptible pea, the goal of the cross being to introduce mildew resistance without losing the high-yield characteristics.

Which type of genetic resistance is more durable?

TABLE 1. Cloned genes with partial effects contributing to quantitative resistance in plants. Quantitative resistance is generally more durable than qualitative resistance (Parlevliet, 2002).

How does disease resistance in plants work?

Plant immune systems rely on their ability to recognize enemy molecules, carry out signal transduction, and respond defensively through pathways involving many genes and their products. Pathogens actively attempt to evade and interfere with response pathways, selecting for a decentralized, multicomponent immune system.

Is classical and conventional plant breeding same?

# this technique involves cross hybridization of pure lines followed by artificial selection. It is also given in NCERT book XII BIO which I’m sending you in attachment It is evidences in favour of this fact that CONVENTIONAL METHOD OF PLANT BREEDING and CLASSICAL PLANT BREEDING are same.

What is the difference between classical breeding and genetic engineering?

Conventional breeding relies on mixing characteristics from different populations within a species and then selecting from a plants natural complement of genetic elements. However genetic engineering relies on inserting genetic elements, and they end up in random locations, which can disrupt complex gene interactions.

What is classical plant breeding?

Classical plant breeding uses deliberate interbreeding (crossing) of closely or distantly related individuals to produce new crop varieties or lines with desirable properties. Plants are crossbred to introduce traits/genes from one variety or line into a new genetic background.

What is plant breeding describe various steps involved in classical breeding of plants?

Classical plant breeding involved crossing or hybridization of pure lines followed by artificial selection to produce plants with desirable traits of higher yield, nutrition and resistance to diseases.

What is genetic resistance to disease?

Genetic resistance that is effective at preventing successful attack only by certain races of a pathogen is called specific (or vertical) resistance, whereas resistance that is effective at preventing successful attack by all races of a pathogen is called general (or horizontal) resistance.

What is QTL in plant breeding?

Quantitative trait loci (QTL) analysis allows the location and effect-estimation of the genetic elements controlling any trait by the joint study of segregation of marker genotypes and of phenotypic values of individuals or lines. QTL analysis is now seen as a procedure to fill the gap between “omics” and the field.

What are the advantages of breeding for disease resistance in plants?

Plant breeding for disease resistance has two advantages given below: ADVERTISEMENTS: (i) It enhances the production of food by reducing dosses due to diseases. (ii) Reduces the dependance on fungicides and bacteriocides.

What are the types of resistance to disease?

Historically, two categories of disease resistance have been recognized in plants: qualitative and quantitative resistance. Qualitative resistance is genetically controlled by major genes, which provide phenotypically complete or incomplete resistance to the pathogen.

What are limitations of classical plant breeding?

While an extremely important tool, conventional plant breeding also has its limitations. First, breeding can only be done between two plants that can sexually mate with each other. This limits the new traits that can be added to those that already exist in a particular species.

What are some examples of classical breeding?

Classical Breeding Plants are crossbred to introduce traits/genes from one variety or line into a new genetic background. For example, a mildew-resistant pea may be crossed with a high-yielding but susceptible pea, the goal of the cross being to introduce mildew resistance without losing the high-yield characteristics.