双交种（double hybrid）

互联网2013-11-14

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　　双杂交种的简称。由四个品种或自交系先两两配成单交种，再由两种单交种杂交而得的杂交组合。（ A× B） F₁ ×（ C× D） F₁ 所得杂种即为双交种。双交种制种成本低，可提高制种田产量，缩小制种田面积。但需较多隔离区，程序亦较复杂，育种时间较长，增产效果往往不及单交种，在生产上的应用已逐渐减少。

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