Questions and Answers
Which two species of the genus Oryza are cultivated?
Where is Oryza glaberrima primarily cultivated?
Which of the following regions is NOT mentioned as a potential center of origin for rice?
Who suggested that both India and Myanmar should be considered as centers of origin for cultivated rice?
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What is considered the oldest sample of paddy grains discovered?
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Which of the following relatives does Oryza sativa NOT have?
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Study Notes
Origin of Rice
- Two cultivated species of the genus Oryza: Oryza sativa (globally raised) and Oryza glaberrima (specific to tropical West Africa).
- Oryza sativa has wild relatives: perennial Oryza rufipogon and annual Oryza nivoroo.
- Oryza glaberrima has wild relatives: perennial Oryza longistaminata and annual Oryza barthii.
- The oldest rice grains, excavated from Hastinapur, India, date back to 1000-750 B.C..
- The Southwest Himalayas is identified as a region with diverse rice varieties and a probable origin center for rice cultivation.
- Historical sources suggest South India as a center of rice origin (De Candolle, 1886; Watt, 1862).
- Vavilov proposed that both India and Myanmar are key centers for cultivated rice origin.
- D. Chatterjee (1948) theorized two centers of origin for cultivated rice: Southeastern Asia (including India, Myanmar, and Thailand) and West Africa.
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Description
Explore the fascinating history and species of rice, focusing on the cultivated varieties Oryza sativa and Oryza glaberrima. This quiz will test your knowledge about the origin and relatives of rice species, including their wild counterparts. Learn about archaeological finds and their significance in understanding rice cultivation.
