Max Marks: 20
Time: 40 min
Q1. Fill in the blanks (10 marks)
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____________________________ is the closest form of inbreeding.
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All the self-pollinated plants have _______________________ flowers.
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Maturation of anthers and stigma of a flower at the same time is known as _____________________.
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Opening of flowers only after the completion of pollination is called _________________ like in crops _____________ and __________.
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Stigmas are surrounded by anthers in such a way that self-pollination is ensured in crops like ________________ and _____________________.
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In some legumes, the stamens and stigma are enclosed by the petals in such a way that self-pollination is ensured in crops like _____________________ and _________________.
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When staminate and pistillate flowers are present on different plants, then the condition is known as _________________ like in ___________________ and ______________.
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____________________ condition promotes cross-pollination even in hermaphrodite species.
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When styles and filaments in a flower are of different lengths, it is called _______________________ such as in _____________________.
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A plant that serves as the pollen source for other plants is called a ___________________.
Q2. (2.5 marks)
List the causes of impurities in a variety.
Q3. (2.5 marks)
Name the methods for nucleus seed production in wheat, rice, cowpea and chickpea.
Q4. (2.5 marks)
What are the label colour and sizes for different classes of seed?
Q5. (2.5 marks)
Under what conditions and for which crops is time isolation NOT permitted?
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