The Impact of Exotic Genetic Materials on Rice Production in China
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The genetic contribution and economic impacts of exotic germplasm
(particularly IRRI’s and Japan’s material) to China’s rice production
are studied based on the analysis of varieties’ pedigree information
from 16 major rice producing provinces in China during 1982-2011.
The results indicated that the exotic germplasm, especially those coming
from the International Rice Research Institute (IRRI) and Japan
contributed greatly to China’s rice production and varietal
improvement efforts. IRRI is the biggest contributors to China rice
production, the average contribute rate reach 16.3% in 30 years. The
contribution to china rice production increase gradually during the
1980s’, it reached its peak 23.59% in 1990 then declined gradually over
the years that followed. The trend of Japanese varieties manifests a
steady share since 1992. And their overall importance shows no sign of
fading. The policy implication means that government should encourage
breeders to focus more on the use and improvement of exotic germplasm.