| 玉米11个农艺性状的通径分析 |
| |
| 引用本文： | 广成,薛雁,何代元,刘强.玉米11个农艺性状的通径分析[J].杂粮作物,2003,23(1):9-13. |
| |
| 作者姓名： | 广成 薛雁 何代元 刘强 |
| |
| 作者单位： | 1. 陕西省种业集团,种子科学院,陕西,泾阳,713702
2. 陕西省种子站,陕西,西安,710016 |
| |
| 摘 要： | 用不完全双列杂交法组配成35个组合，对玉米的生育期等11个性状与籽粒产量的遗传相关和通径进行了研究。结果表明，株高等7个性状与籽粒产量呈极显著正相关，生育期为显著正相关，穗位高和穗粗为正相关，但差异不显著，穗行数为显著负相关。通径分析结果表明：果穗结实长度等7个性状与籽粒产量的直接通径系数为正值，面千粒重等4个性状的直接通径系数为负值。在玉米高产育种中，要重视选择果穗结实长、籽粒行数多、果穗长和出籽率高的类型，适当注意穗位高等3个性状的选择，对千粒重等4个性状的选择可适当放宽。同时，也要注意到各性状间的相关性，把杂交种的各农艺性状协调到最佳程度。
|
| 关 键 词： | 农艺性状 通径分析 玉米 遗传相关系数 |
| 文章编号： | 1003-4803(2003)01-0009-05 |
Path Analysis of Eleven Agronomic Characters in Maize |
| |
| GUANG Cheng ,XUE Yan ,HE Dai yuan ,LIU Qiang.Path Analysis of Eleven Agronomic Characters in Maize[J].Rain Fed Crops,2003,23(1):9-13. |
| |
| Authors: | GUANG Cheng XUE Yan HE Dai yuan LIU Qiang |
| |
| Institution: | GUANG Cheng 1,XUE Yan 2,HE Dai yuan 1,LIU Qiang 1 |
| |
| Abstract: | Thirty five crossed were made by using incomplete diallel crosses. Heredity correlation and heredity path of maize yield with eleven characters of growth period etc. was studied. The results indicated that maize yield was highly significantly correlated with seven characters of plant height etc., it was significantly correlated with growth period, and correlated with ear height and ear diameter, but rows per ear had negative effect on grain yield. The results of path analysis indicated that directly path coefficients of seven characters were positive, others were negative when selecting high yield maize hybrids, we should select the phenotypes of long fertile, many kernel rows, long ear and high germination percantage, meanwhile, select three characters of ear height etc., and the standard of other four characters was not high. |
| |
| Keywords: | maize heredity correlated coefficient path coefficient |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
