摘要
以华北地区种植面积较大的１０个夏谷品种为试材，对单株粒重、穗长、单穗重、穗码数、穗粗、茎节数、干草重、株高和千粒重９个数量性状进行了相关遗传力及其通径分析。结果表明，通过单穗重在早代间接选择单株产量可达到对单株产量进行直接选择的效率；通过株高在早代选择单株产量也可获得理想效果。在选择强度相同时，通过其它性状间接选择的效率均比对单株产量的直接选择效率低。
Thecorrelativeheritabilityof9quantitativecharacters,includingyieldperplant,earlength,eraweightperplant,yardnumberperear,eardiameter,jointnumberperplant,driedstrawweight,plantheightandthousandgrainweight,wasstudiedin10summermilletvarietieswhichweremainlyplantedinHuabeidistrict.Thepathanalysiswasalsoappliedintheanalysis.Theresultsshowedthattheefficiencyofindirectselectionforyieldperplantbyselectingearweightperplantimmediatelyinearlygenerationswasassameasthatofimmediateselectionforyieldperplant.Theidealresultcouldbealsoobtainedforindirectselectionofyieldperplantbyselectingplantheightdirectly.Theefficiencyofindirectselectionforyieldperplantwaslowerthanthatofimmediateselectionwhenselectionintensitywassame.
关键词
夏谷
数量性状
相关遗传力
通径分析
粟
育种
summermillet
quantitativecharacter
correlativeheritability
pathanalysis
