Podcast Beta
Questions and Answers
Ideotype breeding is a slow method of cultivar development because incorporation of various desirable characters from different sources into a single genotype takes _______ time
long
In ideotype breeding, selection is focused on individual plant character which enhance the _______
yield
In ideotype breeding, the phenotype of new variety to be developed is specified in terms of morphological and physiological traits in _______
advance
Ideotype breeding is in true sense an interdisciplinary approach, it involves scientists from the disciplines of genetics, breeding, physiology, pathology, _______ etc.
Signup and view all the answers
Ideotype breeding is a continuous process because new ideotypes have to be developed to meet changing and increasing _______
Signup and view all the answers
In traditional breeding, the main objective is defined before initiating the breeding work. In ideotype breeding, the conceptual theoretical model is prepared before initiation of breeding work. Selection is focused on yield and some other _______
Signup and view all the answers
Crop ideotype refers to model plants or ideal plant type for a specific ______
Signup and view all the answers
An ideotype in crop breeding is a biological model expected to perform in a predictable manner within a defined ______
Signup and view all the answers
Ideotype breeding aims to enhance genetic yield potential through genetic manipulation of individual plant ______
Signup and view all the answers
Emphasis in ideotype breeding is on individual morphological and physiological ______ that enhance the yield
Signup and view all the answers
Genetic differences exist for various physiological characters like photosynthetic efficiency and nutrient uptake, which are exploited in ideotype breeding to increase crop ______
Signup and view all the answers
Various plant characters are included in the ideotype based on correlations analysis, with only those exhibiting a positive association with yield being included in the ______
Signup and view all the answers
The rainfed crop needs ______ resistance, fewer and smaller leaves to reduce water loss through transpiration.
Signup and view all the answers
In dicots, ______ types are required for rainfed conditions, because indeterminate type can produce another flush of flowers if the first flush in affected by drought conditions.
Signup and view all the answers
Socio-economic condition of farmers also determines crop ______.
Signup and view all the answers
For example, dwarf Sorghum is ideal for mechanical harvesting in USA, but it is not suitable for the farmers of Africa where the stalks are used for ______ or hut constructions.
Signup and view all the answers
The ideotype also differ according to the economic use of the crop, for example, dwarf types are useful in Sorghum and pearl millet when the crop is grown for ______ purpose.
Signup and view all the answers
Ideotype breeding consists of four important steps, 1. Development of Conceptual Model The values of various morphological and physiological traits are specified to develop a conceptual theoretical model. For example, values for plant height, maturity duration, leaf size, leaf number, angle of leaf, photosynthetic rate etc., are specified. Then efforts are made to achieve this ______.
Signup and view all the answers
Study Notes
Ideotype Breeding
- Ideotype breeding is a slow method of cultivar development because it takes a long time to incorporate various desirable characters from different sources into a single genotype.
Key Principles of Ideotype Breeding
- Selection is focused on individual plant characters that enhance the yield.
- The phenotype of a new variety is specified in terms of morphological and physiological traits in advance.
Interdisciplinary Approach
- Ideotype breeding involves scientists from various disciplines, including genetics, breeding, physiology, pathology, and others.
Continuous Process
- Ideotype breeding is a continuous process because new ideotypes have to be developed to meet changing and increasing demands.
Crop Ideotype
- Crop ideotype refers to a model plant or ideal plant type for a specific environment.
- An ideotype in crop breeding is a biological model expected to perform in a predictable manner within a defined environment.
Objectives
- Ideotype breeding aims to enhance genetic yield potential through genetic manipulation of individual plant characteristics.
- Emphasis is on individual morphological and physiological traits that enhance the yield.
Genetic Differences
- Genetic differences exist for various physiological characters like photosynthetic efficiency and nutrient uptake, which are exploited in ideotype breeding to increase crop yields.
Correlations Analysis
- Various plant characters are included in the ideotype based on correlations analysis, with only those exhibiting a positive association with yield being included in the ideotype.
Environmental Factors
- Rainfed crops require drought resistance, fewer and smaller leaves to reduce water loss through transpiration.
- For rainfed conditions, determinate types are required in dicots, as indeterminate types can produce another flush of flowers if the first flush is affected by drought.
- Socio-economic conditions of farmers also determine crop ideotype.
Economic Use
- The ideotype also differs according to the economic use of the crop, for example, dwarf types are useful in Sorghum and pearl millet when the crop is grown for grain purpose.
Steps of Ideotype Breeding
- Development of a conceptual model, where the values of various morphological and physiological traits are specified to develop a conceptual theoretical model.
- Efforts are made to achieve this model through breeding.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the slow progress, selection process, and model designing in ideotype breeding for cultivar development. Learn about the challenges, benefits, and key characteristics of this method.
