玉米穗部产量性状杂种优势分析

研究了玉米穗部性状的杂种优势,双亲生育期间隔长短与F1穗粒重的关系以及穗部性状亲子相关.结果表明:穗粒重、穗重的杂种优势最大,其次为穗粒数、千粒重、穗长、穗粗,穗行数为最小.F1穗粒重杂种优势与双亲生育期间隔长短无关.杂交种穗粗、穗行数与母本穗粗、穗行数以及中亲值呈正相关,杂交种千粒重与中亲值呈正相关。

Heterosis Analysis of Ear Characteristics in Maize

The field trial was conducted to study heterosis of ear characteristics,relationship between difference in days of growing stage for biparent and ear grain weight,and correlation for ear characteristics between hybrid and parents.Effects indicated that heterosis for ear grain weight and ear weight was highest,following by ear grain number,thousand-grain weight,ear length and ear width,and that for row number was lowest.No correlation between heterosis of ear grain weight and difference in growing stage of biparent was found.Ear length and ear row number of hybrid were positively correlated with ear length and row number of female parent and mean of biparent.Thousand-grain weight of hybrid was positively correlated with mean of biparent.