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Weedy rice, also known as red rice, is a variety of rice that produces far fewer grains per plant than cultivated rice and is therefore considered a pest. The name "weedy rice" is used for all types and variations of rice which show some characteristic features of cultivated rice and grow as weeds in commercial rice fields.
[9] Along with this, "weedy red rice (Oryza sativa) is a problematic weed in cultivated rice," and of the rice fields in Arkansas that account for 50% of the nation's rice crop, "about 60% of these...have some red rice infestation." [18] Weeds such as barnyard grass and weedy red rice can often have detrimental effects to rice fields throughout ...
Oryza sativa, having the common name Asian cultivated rice, [2] is the much more common of the two rice species cultivated as a cereal, the other species being O. glaberrima, African rice. It was first domesticated in the Yangtze River basin in China 13,500 to 8,200 years ago.
A team of researchers from the Africa Rice Center (AfricaRice), [22] Wageningen University, FAO and the national research centers of Tanzania , Côte d'Ivoire and Benin , investigates the importance of this species as a parasitic weed to rice [11] and tries to elucidate its biology, ecology and host damage mechanisms [23] [24] and to develop ...
Unknown in weedy rice. Vavilovian mimicry: SD1 alleles conveying shorter stature, slower growth, and earlier flowering, introgressed from O. sativa cultivars into weedy rice. (May or may not be adaptive, not actually confirmed.) Herbicide resistance: Various genes identical to genetically engineered domesticated O. sativa introgressed into ...
Perennial rice research plot at a YAAS research station on Hainan Islands. Hu Fengyi, now deputy director of the Food Crops Institute at YAAS, worked on the IRRI perennial-rice project and was senior author of the paper that first reported on mapping of genes for rhizome production in rice. [30]
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[2] [3] It is known as brownbeard rice, [4] wild rice, [5] and red rice. [5] In 1965, Oryza nivara was separated off from O. rufipogon . The separation has been questioned, [ 6 ] and now many sources consider O. nivara to be a synonym of O. rufipogon . [ 7 ]