6个粤糖甘蔗亲本及其杂交组合的育种价值评价

Assessment on Breeding Value of Six Yuetang Parents of Sugarcane and Their Cross Combinations

为了解粤糖系列甘蔗(Saccharum officinarum)亲本的遗传特点和组合选配效果,采用家系评价方法,对以6个粤糖系列亲本(‘粤糖00-236’、‘粤糖03-373’、‘粤糖93-159’、‘粤糖94-128’、‘粤糖99-66’、‘粤糖08-1966’)为核心配置的55个组合F1群体的6个主要性状的遗传效应、经济育种值等参数进行估算。结果表明,6个性状中茎径受母本、父本加性基因效应和非加性基因效应影响,株高、锤度、含糖量和蔗茎产量受父本加性基因效应和非加性基因效应影响,而有效茎数受父本加性基因效应影响。6个亲本中,‘粤糖94-128’作为母本的蔗茎产量的一般配合力效应值和经济育种值最高,适宜做高产的母本,而‘粤糖93-159’作为父本的含糖量的一般配合力效应值最高,经济育种值也较高,适宜做高糖父本。55个组合中,‘粤糖94-128’×桂糖02-761’、‘粤糖00-236’ב桂糖94-119’和‘桂糖02-467’ב粤糖93-159’等的特殊配合力效应值和组合经济育种值均较优,可作为重点生产性家系。这为应用粤糖亲本进行杂交组合配置提供了依据。

In order to understand the genetic characteristics and effects of combination selection of Yuetang parents of sugarcane(Saccharum officinarum),the genetic effects,economic breeding values of 6 main traits of F1 population from 55 combinations were estimated by using family test method,which families were combined from 6 Yuetang parents,such as‘YT00-236’,‘YT03-373’,‘YT93-159’,‘YT94-128’,‘YT99-66’,and‘YT08-1966’.The results showed that among six parameters,the stalk diameter was controlled primarily by female and male additive genes effects and non-additive genes effects.The plant height,brix,sugar content and cane yield were mainly controlled by male additive genes effects and non-additive genes effects.The tiller number was controlled just by male additive genes effects.The general combining ability(GCA)of cane yield and economy breeding value(EBV)in‘YT94-128’as female were the highest among six varieties,which could be used as high-yield female,while‘YT93-159’possessed the highest GCA of sugar content and relatively high EBV as male,which could be used as high-sugar male.Among the 55 combinations,the cross combinations‘YT94-128’בGuitang02-761’,‘YT00-236’בGuitang94-119’and‘Guitang02-467’בYT93-159’had better special combining ability and EBV than the others,which could be considered as the most important productive families.Therefore,these would provide helpful information for using Yuetang parents in cross combination.