Describe the origin, cytology and distribution of Triticum aestivum Linn

Origin:
Triticum aestivum Linn, commonly known as bread wheat or common wheat, is a key cereal crop that has played a fundamental role in human civilization for millennia. Its origin can be traced back to the Fertile Crescent region of the Near East, encompassing modern-day countries like Iraq, Syria, Turkey, and Iran. Archaeological evidence suggests that wheat domestication began around 10,000 years ago, as hunter-gatherer societies transitioned to agriculture. Early farmers selectively bred wild grasses, such as Triticum monococcum and Triticum dicoccum, leading to the emergence of Triticum aestivum as a distinct cultivated species.

Cytology:
Triticum aestivum is a hexaploid species, meaning it has six sets of chromosomes, designated as AABBDD. This complex genomic composition results from two separate hybridization events involving three diploid _________ ______ _______ ________ __________ _________ __________.
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