基于能源利用的高粱配合力和杂种优势分析

Combining ability and heterosis of sorghum for biomass energy

为选育生物量高的能源高粱(Sorghum bicolor L.Moench),本研究对不同类型的15个高粱品种和4个不育系,采用NCⅡ遗传交配设计,获得60个杂交组合,对地上部生物量等11个性状进行了配合力和杂交优势分析。结果表明:地上部生物量等10个性状的遗传是由加性和非加性基因共同控制,倒伏率主要受加性基因控制。父本NW-21、绿能3号和母本A3晋粱5A地上部生物量的一般配合力效应值极显著高于对照,是适宜组配高生物产量能源高粱杂交种的父、母本材料。A3三尺三A×绿能3号和A3三尺三A×Saccaline是地上部生物量特殊配合力效应值较高的组合。杂交高粱中在地上部生物量上存在超标优势。

One of the breeding objectives of sorghum（Sorghum bicolor L.Moench）is to obtain high biomass yield.Fifteen different types of sorghum R lines and four male sterile lines were used to analyze the combining ability and heterosis of 11 traits with NCⅡ genetic mating design mating scheme.The results indicated that lodging percentage was controlled additive effects;other traits such as aboveground biomass were contributable to both additive and non-additive effects.Those parental lines of NW-21,Lvneng-3 and maternal parental line of A3Jinliang-5A with higher general combing ability for the aboveground biomass were identified as potential parental materials for high biomass hybrid breeding program.The two crosses of A3Sanchisan A×Lvneng-3 and A3Sanchisan A×Saccaline revealed significantly higher aboveground biomass than that of A3Sanchisan A×Rio（check）.Hybrids displayed over-standard heterosis in aboveground biomass.