异地种植对微胚乳玉米主要性状的影响研究

Studies on the Effect of Planting in Different Places on the Major Characters of the Micro-endosperm Maize

在广西南宁、山西平遥两个地点分别种植16个微胚乳玉米杂交组合,观测了主要农艺性状和产量性状,同时估算了这些重要性状的广义遗传率。结果如下:(1)抽雄期、散粉期、吐丝期、株高和穗位高5个性状,在山西平遥所有组合的值都高于广西南宁;穗长、穗粒重和百粒重3个性状则是山西平遥所有组合的值都低于广西南宁;穗粗则随组合而异。(2)两地各性状的广义遗传率相差较大的有抽雄期、散粉期、吐丝期、穗长和百粒重。一年多点联合方差分析广义遗传率比单一地点分析都高的有株高、穗粗、穗粒重和百粒重。

16 Micro-endosperm maize（MEM） cross combinations were planted separately in Guangxi Nanning and Shanxi Pingyao,the major agronomic characters and yield characters were observed,the broad sense heritability was estimated.The results were as following：（1）The days to tassel,days to pollen,days to silk and plant height and ear height were higher in Shanxi Pingyao than in Guangxi Nanning.The ear length,kernel weight per ear and 100-kernel weight were higher in Guangxi Nanning than in Shanxi Pingyao.The ear diameter was different from different cross combinations.（2）The days to tassel,days to pollen,days to silk,ear length and 100-kernel weight,the difference of the broad sense heritability in two locations was high.And the plant height,ear diameter,kernel weight per ear and 100-kernel weight,the broad sense heritability by combining variance analysis was higher than that of single variance analysis.