摘要
利用7个面筋品质不同的小麦品种(系),按Griffing双列杂交法II配制21个杂交组合,对小麦湿面筋含量和面筋指数进行了遗传分析。在7个亲本中,新麦18的湿面筋含量和面筋指数均较高,一般配合力好,能显著地提高杂种后代的湿面筋含量和面筋指数;周8425B湿面筋含量最高,一般配合力较好,可以较快地提高后代湿面筋含量,但后代面筋指数较差,综合品质不易得到提高。小麦湿面筋含量和面筋指数是由多基因控制的数量性状,不仅受加性和显性效应影响,还存在非等位基因间互作。湿面筋含量的高值受显性基因控制,早代即可表达,容易选择;而面筋指数的高值却受隐性基因控制,早代不宜选择。湿面筋含量狭义遗传力相对较低,而面筋指数狭义遗传力较高,且二者间相关性不强。湿面筋含量和面筋指数具有实验操作简单、方便快捷、需要样品少等优点,可用于指导优质育种和小麦生产。
The objective of this study was to disclose the genetic mechanism of gluten quality in common wheat.Using seven wheat cultivars with different wet gluten contents（WGC） and gluten indices（GI）,21 crosses were obtained using the Griffing diallel cross II design.Among the parents,Xinmai 18 had large general combining abilities for WGC and GI,and the both WGC and GI were increased significantly in its hybrids.Parent Zhou 8425B had the highest WGC and its general combining ability was relatively large.The WGC of hybrid progenies from Zhou 8425 were significantly improved.However,the GI values of Zhou 8425B progenies were small,indicating that the dough quality of Zhou 8425B progenies was difficult to be improved.The inheritances of WGC and GI followed the additive-dominance-epitasis model with recessive loci for increasing GI and dominant loci for increasing WGC.Because GI is controlled by recessive genes and its narrow sense heritability is high,a relatively large population is recommended in early breeding generations and the phenotypic selection should not be too intensive.GI and WGC may be used in direct breeding of wheat quality.
出处
《作物学报》
CAS
CSCD
北大核心
2011年第9期1701-1706,共6页
Acta Agronomica Sinica
基金
国家农业科技成果转化项目(2009GB2D000548)
转基因生物新品种培育重大专项(2008ZX08002-003)
河南省现代农业产业技术体系建设专项(2130199-ny)
国家科技支撑计划项目(2011BAD07B02)
现代农业产业技术体系建设专项(nycytx-03)资助
关键词
小麦
湿面筋含量
面筋指数
配合力
品质
Wheat
Wet gluten content
Gluten index
Combining ability
Quality
