Breeding Methods for Cross-Pollinated Crops I (Mass Selection, Recurrent Selection)
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Question No. 1 Marks +1 -0 Time
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Which of the following breeding methods for cross-pollinated crops primarily relies on phenotypic selection of individual plants from a mixed population and bulking their seeds for the next generation?
Question No. 2 Marks +1 -0 Time
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In the context of cross-pollinated crops, a key advantage of Mass Selection is its:
Question No. 3 Marks +1 -0 Time
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Consider the following statements regarding Recurrent Selection:
1. It aims to improve the mean performance of a population while maintaining genetic variability.
2. It primarily relies on phenotypic selection without progeny testing.
3. It is a cyclical process involving selection and intermating.
4. It is often used to develop hybrid varieties directly.

How many of the above statements are correct?
Question No. 4 Marks +1 -0 Time
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Which type of Recurrent Selection is specifically designed to improve the General Combining Ability (GCA) of a population?
Question No. 5 Marks +1 -0 Time
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A major limitation of Mass Selection in improving cross-pollinated crops is that:
Question No. 6 Marks +1 -0 Time
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What is the primary purpose of intermating the selected individuals in a cycle of Recurrent Selection?
Question No. 7 Marks +1 -0 Time
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Match the breeding method in Column I with its characteristic feature in Column II:

Column I (Method)Column II (Characteristic)
1. Mass Selectioni. Involves a tester parent
2. Recurrent Selectionii. Based on individual plant phenotype
iii. Cyclical improvement of population mean
iv. Primarily used for developing pure lines
Question No. 8 Marks +1 -0 Time
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Which of the following statements most accurately describes the genetic impact of Mass Selection on a cross-pollinated population?
Question No. 9 Marks +1 -0 Time
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In Reciprocal Recurrent Selection (RRS), what is the main objective?
Question No. 10 Marks +1 -0 Time
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For which type of traits is Mass Selection generally considered more effective in cross-pollinated crops?
Question No. 11 Marks +1 -0 Time
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Which of the following is a common step in most forms of Recurrent Selection but typically absent in basic Mass Selection?
Question No. 12 Marks +1 -0 Time
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Consider the following statements about the application of breeding methods:
1. Mass selection is often used for initial improvement of open-pollinated varieties.
2. Recurrent selection can be a precursor to developing synthetic or hybrid varieties.
3. Both methods are equally effective in improving complex polygenic traits.
4. Mass selection inherently prevents inbreeding depression in cross-pollinated crops.

How many of the above statements are correct?
Question No. 13 Marks +1 -0 Time
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What is the primary difference in the selection unit between Mass Selection and Recurrent Selection (when involving progeny testing)?
Question No. 14 Marks +1 -0 Time
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Which of the following scenarios would most appropriately utilize Simple Recurrent Selection?
Question No. 15 Marks +1 -0 Time
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Match the term in Column I with its description in Column II:

Column I (Term)Column II (Description)
1. Open-pollinated varietyi. A population improved through repeated cycles of selection and intermating
2. Synthetic varietyii. A variety maintained by mass selection where random mating occurs among selected plants
3. Improved populationiii. A variety produced by intermating a few self-incompatible or highly cross-pollinated lines
Question No. 16 Marks +1 -0 Time
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A breeder wants to improve a cross-pollinated crop for a trait with moderate heritability. Which method would generally offer a better balance between genetic gain and maintenance of variability compared to simple mass selection?
Question No. 17 Marks +1 -0 Time
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Which of the following statements is false regarding Mass Selection in cross-pollinated crops?
Question No. 18 Marks +1 -0 Time
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In Recurrent Selection for Specific Combining Ability (SCA), what type of tester is typically used?
Question No. 19 Marks +1 -0 Time
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What is the primary risk associated with very high selection intensity in Mass Selection?
Question No. 20 Marks +1 -0 Time
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Consider the following pairs of breeding methods and their main focus:
1. Mass Selection : Improving specific combining ability
2. Simple Recurrent Selection : Improving general combining ability
3. Reciprocal Recurrent Selection : Improving inter-population hybrid performance
4. Recurrent Selection for SCA : Improving intra-population additive effects

How many of the above pairs are correctly matched?
Question No. 21 Marks +1 -0 Time
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Which of the following is a potential outcome of multiple cycles of Recurrent Selection in a cross-pollinated crop?
Question No. 22 Marks +1 -0 Time
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What role does environmental variation play in the effectiveness of Mass Selection compared to Recurrent Selection with progeny testing?
Question No. 23 Marks +1 -0 Time
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A breeder wants to improve a maize population for yield. After several cycles of Mass Selection, the genetic gain has plateaued. What might be the most likely reason for this plateau?
Question No. 24 Marks +1 -0 Time
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Which of the following steps is NOT typically part of a standard cycle of Simple Recurrent Selection?
Question No. 25 Marks +1 -0 Time
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In the context of breeding for cross-pollinated crops, what is the significance of maintaining genetic variability during selection cycles?

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