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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • Chromosome number of hexaploid wheat is………

    Question: Chromosome number of hexaploid wheat is………

    Options:

    28
    42
    56
    24

    ✅ Explanation: Hexaploid wheat has six sets of chromosomes (6n) and the basic chromosome number (n) of wheat is 7. Therefore, the total chromosome number in hexaploid wheat is 6 x 7 = 42. Example: bread wheat is Triticum aestivum, is hexaploid nature (6x) and the basic chromosome number of 7.

    📌 Other Options Explanations:
    -(A) 28: This is the chromosome number for tetraploid wheat (4n = 28).

    🔑Key Points: :

    ✏️Common bread wheat (Triticum aestivum):
    -It is hexaploid, 2n=42 and mostly grown in India.
    -Occupies about 87% of wheat area. Good for chapati making and bakery products.
    -Introduced in India by Borlaug from Mexico hence also called as Mexican dwarf wheat and it was responsible for green revolution.

    ✏️Durum/Macaroni wheat (Triticum durum):
    -It is tetraploid, 2n=28.
    -Used for  Suji, Semya preparation.
    -Occupies 12% of wheat area, particularly in Central and Southern India.
    -Durum varieties: Jairam, Malavika.

    ✏️Emmer wheat (Triticum diccocum):
    -It is tetraploid, 2n=28.
    -Occupies about 1% wheat area confined to Gujarat, Maharashtra, Karnataka.
    -Used for making south Indian dish Uppumav.

    ✏️Diploid species:
    -Triticum monococcum: 2n=14.
    -Triticum aegiloploid: 2n=14.

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