典型相关分析在高粱遗传育种中的应用研究

利用20个高粱品种为试材，根据生物学意义将19个性状归纳为4个性状组，对性状和性状组进行基因型值相关分析和典型相关分析。同时，建立了由多个农艺性状间接改良多个品质性状的综合选择指数。结果表明：对产量影响最大的因素是单穗粒重，其次为穗粒数。而穗粒重与穗粒数之间存在着显著的负相关，因此，在高粱丰产育种中，以提高单穗粒重为选育目标；而在以提高淀粉含量为主要目标的品质育种中，应选择茎秆粗壮单穗粒数多、株高适中的材料；在相关性上起作用的性状主要有抽穗期、开花期、株高、茎粗、叶片数、穗粒重、穗粒数、蛋白质含量、容重、角质率等，为了选育丰产、优质的高粱品种，应重视对这些性状的选择。

Application Research of Canonical Correlation Analysis in Sorghum Breeding

The nineteen characters were subsumed in chareter groups which was analysed by the canonical correlation of genotypical value;meanwhile overall selecting index for the indirect improvement of much quality was established.The result indicated that the most important factor for the yield of sorghum is grain weight per spike and less important factor is grain number per spike.The significant negative correlation existed between the grain weight per spike and grain number per spike.In yield breeding of sorghum we should take the increment of grain weight per spike as prinapal breeding but in quality breeding for the increment of starch content and select the material with strong stalk,less grain number per spike,appropriate height.The characters which have in fluence on the correlation are heading period,flowering period,height,width of stalk,number of leaves,grain weight per spike,protein content,volume weight per keration etc,for seleting high yielding and high quality sorghun cultivar,must take attention to the selection of these charaters.