摘要
以热带种路打士(Saccharum officinarum)与滇蔗茅(Erianthus rockii)云南95-19属间远缘杂交F1群体的62个无性系为研究对象,利用方差、相关、逐步回归及通径分析方法对其单茎重、株高、茎径、有效茎、节间长度、小区产量等6个农艺性状进行遗传分析。结果表明:所有性状分布频率接近正态分布,单茎重、株高、茎径、节间长度在后代群体中存在双向超亲分离,有效茎平均表型值高于母本,小区产量平均表型值低于母本;有效茎、节间长度与小区产量呈极显著正相关,并解释小区产量48.9%、3.4%的变异信息;单茎重与小区产量呈显著正相关,并解释小区产量32.3%的变异信息;株高、茎径主要通过间接效应影响小区产量,有效茎、单茎重、节间长度更适于作为该群体后代材料高产潜力的选择指标。
Six agronomic traits including average stalk weight,stalk length,stalk diameter,millable stalk,internode length and plot yield of a set of 62 populations of Saccharum officinarum Ludashi ×Erianthus rockii Yunnan 95-19 were investigated by using variance analysis,correlation analysis,stepwise regression analysis and path analysis.The results showed approximately normal distribution of frequency for these traits.Average stalk weight,stalk length,stalk diameter and internode length showed bi-directional transgressive segregation in the progeny populations with average phenotype value of millable stalk higher and average phenotype value of plot yield lower,compared to the parent populations.Millable stalk,internode length exhibited extremely significant correlation with plot yield,and average stalk weight showed significant correlation with plot yield.Millable stalk and internode length exhibited extremely significant correlation to yield per plot,and these two traits contributed 48.9% and 3.4% of genetic variation of the yield per plot,respectively.Average stalk weight showed a significant correlation with yeild per plot and contributed 32.3% of genetic varation of the yield per plot.Moreover,stalk length and stalk diameter were found to produce an indirect effect on yield per plot.Out of five traits millable stalk,average stalk weight and internode length turned out to be the most suitiable indices for selection.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第2期121-124,共4页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家科技支撑计划项目(2006BAD13B05-2-10)
云南省应用基础研究计划重点项目(2006C0013Z)
云南省中青年学术技术带头人后备人才培养项目(2009CI059)
国家人事部留学人员科技活动优秀项目
作物种质资源保护项目(NB2011-2130135-18)
云南省重点新产品开发计划项目(2010BB011)
关键词
滇蔗茅
种质创新
F1群体
农艺性状
遗传分析
Erianthus rockii
germplasm innovation
F1 generation
agronomic traits
genetic analysis
