结缕草属植物青绿期的遗传分析  

Genetic analysis of green period of Zoysia

作　　者：郭海林[1,2] 陈宣[1] 薛丹丹[1,2] 郑轶琦[1,2] 王志勇[1,2] 刘建秀[1] 

机构地区：[1]江苏省中国科学院植物研究所南京中山植物园,江苏南京210014 [2]南京农业大学园艺学院,江苏南京210095

出　　处：《草业学报》2009年第4期147-153,共7页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(30571307);江苏省科技攻关项目(BE2006339)资助

摘　　要：选用结缕草属植物青绿期2个极端类型材料Z136和Z039相互杂交，获得正反交F1分离群体，应用植物数量性状主基因＋多基因混合遗传模型分析方法对F1群体青绿期进行遗传分析，以初步明确结缕草属植物青绿期的遗传特性。结果表明，1）正反交后代的青绿期变异范围均较大，正交的变异范围为178～261d，反交的变异范围为188-253d，均远远超出了双亲的青绿期（248和231d），正反交后代的平均值分别为223．6和216．8d，两者存在显著差异，结缕草属植物的青绿期有母体遗传效应。2）正反交的遗传模型差异较大，母体遗传效应和环境效应对青绿期的影响明显，正交F1群体青绿期的最适遗传模型为A-O模型，即无主基因模型，而反交F1群体青绿期的最适遗传模型为B4模型，即2对主基因的等加性遗传模型，且反交的主基因遗传率较高，为94．35％。Two Zoysia F1 segregating populations of the reciprocal crosses of Z136 and Z039 were obtained, and the heredity of the green period in two F1 populations （Z136 ×Z039 and Z039×Z136） was analyzed by the major gene and polygene mixed genetic model to show the underlying genetic. The variation in range of green period of both crosses was 178-261 and 188-253 d, well beyond that of either of their two parents （248 and 231 d）.The average green period of reciprocal crosses were 223.6 and 216.8 d and the significant differences between the two reciprocal crosses further indicated three were maternal genetic effects for the green period in Zoysia.Second, there was a large difference in the genetic models between the two reciprocal crosses. The effect of maternal genetic and of environment were both significant to the green period. No single major gene model （A-O） was the most suitable for the green period of Z136× Z039, but the green period of the reciprocal cross Z039 ×Z136 were controlled by two equal additive major genes. The most suitable model is B-4 and the heritability of major genes of the green period of reciprocal crosses was 94.35 %.

关 键 词：结缕草属 青绿期 遗传分析 

分 类 号：S688.4[农业科学—观赏园艺]