%0 Journal Article
%T Impacts of genetic uniformity on maize production in China<br>中国玉米遗传单一性的经济影响
%A Haiming Li
%A Shihuang Zhang
%A Ruifa Hu
%A <br>李海明
%A 张世煌
%A 胡瑞法
%J 生物多样性
%D 2005
%I Science Press
%X Wide adoption of a few homogeneous lines of germplasm would reduce the genetic diversity of crops, and decrease their resistance and/or tolerance to biotic and abiotic stresses, and therefore reduce the stability of crop production. Based on analysis of pedigrees of varieties from 20 major maize producing provinces in China between 1982-1997, we studied economic impacts of genetic uniformity on maize production. The results indicate that there is a significant negative correlation between genetic uniformity and maize yield. One percent increase of genetic uniformity will cause 13% average yield decline. At the same time, the research also showed that genetic uniformity and variety uniformity are two independent variables. To enrich genetic diversity of the varieties, the government should make policies to increase breeder's incentives to develop new improved varieties using diverse materials.
%K maize yield
%K germplasm
%K diversity
%K pedigree analysis
%K genetic contribution<br>玉米单产
%K 遗传资源
%K 多样性
%K 系谱分析
%K 遗传贡献
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=284A3BE2D09272C2DA95716775015427&aid=AF83A096B35FC085&yid=2DD7160C83D0ACED&vid=FC0714F8D2EB605D&iid=0B39A22176CE99FB&sid=C753EB8AC8F551B9&eid=6700D0D256586E73&journal_id=1005-0094&journal_name=生物多样性&referenced_num=4&reference_num=22