摘要
玉米(Zeamays L.)地方品种是具有丰富遗传变异和有利基因的宝贵基因资源。鉴定地方品种的表型和基因型筛选优良种质,是利用地方品种的前提。对102份湖北省玉米地方种质的11个性状进行了连续2年的表型鉴定,结果显示,各性状在供试材料间的差异显著,性状变异范围广泛。其中,粒重的变化最大,其次为穗位高、穗长、穗行数、行粒数和秃尖长。与BSSSC9和Suwan2的产量组成性状比较,果穗较长的品种有28个,占27%(28/102),如八趟白、百日归等;粒重较大有35个,占34%(35/102),如八趟白、东津白、百日早1、百日早1、百日归等;穗行数较多的有11个,占10.8%(11/102),如米包谷、小包谷和黄玉米等;行粒数较多的有3个,为八趟白、东津白和黄玉米。结果表明湖北省地方品种蕴藏着大量的遗传变异和丰富的有利基因,特别是八趟白、东津白、百日归等品种更是具有广泛的利用价值。
Maize landrace(Zea mays L.)is one kind of the most important genetic resources to supply genetic diversity and favorable genes for breeding population.The intelligent exploitation of maize landraces for maize breeding requires a detailed knowledge of genetic and historical relationships among these populations and an understanding of the partitioning of genetic diversity among populations.The diversity of 102 maize landraces from Hubei Province have been evaluated on the basis of agriculturally important trait data collected in two years.The results showed that significant differences of important traits were examined among the landraces.The range of phenotypic variance on the traits studied was broad,the most broad difference was revealed on the kernel weight among landraces,and sufficient variance was also identified on other important traits among landraces,such as ear height,ear length,row number per ear,kernel number per row and length of barred tip.Comparing the yield components of two elite populations,BSSSC9 and Suwan2,with that of these landraces,the ear length of about 27% landraces(28/102),kernel weight of about 34% landraces(35/102),row number per ear of about 10.8% landraces(11/102)and kernel number of about 3%(3/102)landraces were more excellent than that of the two elite populations,indicating that abundant genetic diversity and favorable genes are accumulated within these landraces from Hubei,especially,Ba-tang-bai,Dong-jin-bai and Bai-ri-gui can potentially be utilized in breeding program.
出处
《长江大学学报（自科版）（中旬）》
CAS
2008年第2期4-9,19,共7页
Journal of Yangtze University(Nature Science Edition)
基金
湖北省财政专项
