the need for the varietal improvement of the crop is to increase the yield of the crop. Explanation: Firstly the objective is to increase the production of the crop. in addition to which supreme quality of crop should be used.
What is the need for varietal improvement discuss any four common objectives of varietal improvement?
1.To develop stable and high yielding varieties of both food and cash crops. 2.To conserve germplasm of important crops. 3.To breed for resistance or tolerance to pests, diseases and adverse conditions such as drought and soil acidity.
What are the various factors for which varietal improvement is done explain?
Detailed Answer: (i) Higher Yield : To increase the productivity of crop per acre. (ii) Improved Quality : Quality considerations such as baking quality, protein quality, oil quality and preserving quality of crop products vary from crop to crop.
Which of the following are the desirable agronomic characteristics to achieve higher productivity?
(vi) To get desirable agronomic characteristics : Tallness and profuse branching are desirable characters for fodder crops. Dwarfness is desired in cereals, so that less nutrients are consumed by these crops. Thus developing varieties of desired agronomic characters help in giving higher productivity.
What is the mechanism of crop variety improvement?
This method results in hybrid variety that has the desired characteristics of both parents. 2. Genetic engineering – It involves producing genetically modified species by altering the gene code of the plant or by introducing a desirable gene and getting the desired results.
What are the methods of crop variety improvement?
Example: Wheat grain, peas, mustard and linseed are rabi crops. Crop variety improvement: It can be done either by hybridisation or by introducing a gene. (i) Crop improvement by hybridisation: Hybridisation refers to crossing between genetically dissimilar plants.
What are the desirable agronomic characteristics of crop improvement?
What are the desirable agronomic characteristics for crop…
- Tallness and profuse branching are desirable characters for fodder crops.
- Dwarfness is desired in cereals, so that fewer nutrients are consumed by these crops.
- Improved nutritional content.
- Short height or dwarfness.
- Increased resistance against pests.
How do biotic and abiotic factors affect crop production?
Biotic factors like insects, rodents, pests, and many more spread the disease and reduce crop production. Biotic factors like insects, parasites, diseases, etc. Abiotic factors like humidity, temperature, moisture, wind, rain, flood and many more destroy the crop raise.
Who gives factors of varietal deterioration?
Kadam (1942) listed the following important factors responsible for deterioration of varieties.
- Developmental variations.
- Mechanical mixtures.
- Mutations.
- Natural crossing.
- Minor genetic variations.
- Selected influence of pest and diseases.
- The techniques of the plant breeder.
Which two factors determine whether the crop is ready for harvesting?
Explanation: The availability of moisture and irrigation facilities decide the choice of the crop to be cultivated after one harvest. If crop rotation is done properly then two or three crops can be grown in a year with good harvest.
How does crop variety improvement improve food production?
Crop variety improvement is the primary step to improve food crop production. It helps in the development of crops with desired traits such as high yields, disease resistance, quality product and response to fertilizers. We can raise different strains of food crops with desirable traits naturally as well as scientifically.
Why do we need new varieties of plants?
To respond to the increasing need to feed the world’s population, standing at 7.1–7.2 billion in 2013 and predicted to reach over 9 billion by 2050, as well as an ever greater demand for a balanced and healthy diet, there is a continuing need to produce improved new cultivated varieties of crop plants.
What are the aims of plant breeding and crop improvement?
There are many aspects to this issue and all affect the plant breeder’s aims and objectives. There are sympathetic methods to achieve these aims. The is an obvious route to follow. Taking this further, if, grow best under these conditions. 5. Better adapted. The need to produce varieties that is clear but easily overlooked.
What makes a crop adaptable to different conditions?
Adaptation: To develop tolerance and make crops more adaptable to different conditions. The crops can be grown even in diverse conditions. For example, crops with tolerance to high salinity soil. Desirable agronomic characteristics: To develop desired agronomic characters in crops.
