免去杂小麦种子生产中繁种纯度的数学模拟研究  

Research on Mathematical Modeling of Wheat Seed Purity by No-Aremoving the Off-types

作　　者：欧行奇[1] 张宗敏 

机构地区：[1]河南科技学院,河南新乡453003 [2]新乡市种子管理站,河南新乡453003

出　　处：《河南农业科学》2006年第9期39-42,共4页Journal of Henan Agricultural Sciences

摘　　要：采取免去杂技术繁殖小麦种子时,决定所繁殖原种和良种纯度的2个主要因素是繁殖种纯度和品种天然异交率。根据杂株率(%)=1-纯度(%),建立了所繁原种或良种的杂株率(X)与繁殖种杂株率(X1)及品种天然异交率的数学模型:X=X1(1+R)。模拟结果表明,在免去杂条件下,繁殖高异交率类型的小麦品种的原种和良种时,要求繁殖种的纯度分别达到99.91%和99.10%;在免去杂条件下,繁殖超高异交率类型的小麦品种的原种和良种时,要求繁殖种的纯度分别达到99.92%和99.20%。When mechanical contamination is completely eradicated in the process of wheat seed reproduction by the technology of no-removing the off-types, the purity of foundation seeds and certified seeds are mainly determined by two factors of the breeder seed purity and the natural cross-pollination rate. The equation model of off-type plant percentage with cultivar purity： percentage of the off-type plant（ % ） = 1 - cultivar purity（ % ） was established firstly, then came the model described the relations of the off-type plant percentage of basic seeds or certified seeds （X） with the off-type plant percentage of breeding seed （X1） and the natural cross-pollination rate（R）：X= X1 （1 ＋ R）. The simulation equation showed that, if adopting technology of no-removing the off-types, the breeding seed purity should reach up to 99.91% （for foundation seeds） or 99.10% （for certified seeds） for the high natural crosspollination cultivars,The breeding seed purity should reach to 99.92% （for foundation seeds） and 99.20% （for certified seeds） for the super-high natural cross-pollination cultivars.

关 键 词：小麦 免去杂技术 繁殖种 纯度 数学模拟 

分 类 号：S512.1[农业科学—作物学]