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  4. Triticum aestizrium the common bread wheat is :

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Q. Triticum aestizrium the common bread wheat is :

BVP MedicalBVP Medical 2004

Solution:

Common cultivated wheat is an example of allopolyploidy. Triticum aestivium is hexaploid with 2n = 42 and derived from three diploid species (i) AA = Triticum aequilopoides (2n = 14) (ii) BB = Aegilops speltoides (24=14) (iii) DD= Aegilops squarrossa (24 = 14). Allopolyploidy is the doubling of chromosome number in F1 hybrid which is derived from two distinctly different species.