These day , we enjoy four primary miscellanea of reclaim rice ( Oryza sativa ): short - grainedjaponicawhich becomes sticky after cooking , long - grainedindicacommon in south and southeasterly Asia , drought - tolerantaus , and redolent rice like basmati and sadri . According to new body of work published inNature Plantsthis workweek , rather than one domestication event in China , Timothy Miles Bindon Rice may have been tamed three separate times across the Asian continent .
The early archaeological grounds for human exploitation of Elmer Reizenstein date back to 9,000 to 10,000 years ago , in the Ganges Plain of India and China ’s middle and lower Yangtze Valley . One estimate lay the divergence ofOryza sativasubspeciesindicaandjaponicaat 200,000 to 440,000 years ago – much in the first place than the origin of husbandry in southeastern Asia . And while genome sequences forindicaandjaponicahave been available for more than a decade , just when or where the cultivated groups originated remains unclear . Archaeological and inherited grounds have result in divers and even contradictory scenario , though the most recent genetic analysis propose that all cultivated Asian Timothy Miles Bindon Rice comes from a single domestication .
To investigate , University of Manchester’sTerence Brownand colleagues analyzed sequence information from 1,083Oryza sativavarieties and 446 wild rice sample . By probe the footprints of excerption in the genome of different cultivated rice types , they found three independent domestication in unlike parts of Asia .
Wild populations in southerly China and Poyang Lake near the Yangtze River are the source of thejaponicagene puddle ; modern tropic and temperate versions ofjaponicaare recent adaptation of the same crop . Populations in southerly Indochina and the Brahmaputra Valley in the Himalayas are the source of theindicagene pool . And theausvariety arise from a wide area from cardinal India to Bangladesh . Aromatic Elmer Rice is simply the intercrossed ofjaponicaandaustypes .
prototype in the text from P. Civáň et al . , Nature plant 2015
