摘要
以21个茎瘤芥品种(系)为试材,研究了各生育时期农艺性状间的关系。结果表明,各生育时期农艺性状间简单相关关系几乎均呈正相关。偏相关分析表明,始期株鲜重与其叶长、叶宽、瘤茎生长量、纵径,中期瘤茎生长量与其株鲜重,单株产量与始期瘤茎生长量、现蕾期叶长、茎/叶、纵径、横径之间均呈显著或极显著正偏相关;始期瘤茎生长量与纵径、横径,始期叶宽与中期株鲜重,纵径与横径,单株产量与始期株鲜重之间均呈显著或极显著负偏相关。多元逐步回归和通径分析表明,始期、中期瘤茎生长量以及现蕾期的叶长、横径、纵径等五个农艺性状对单株产量的偏回归系数和通径系数显著或极显著,其中横径对单株产量作用最大,其次为纵径>现蕾期叶长>中期瘤茎生长量>始期瘤茎生长量,同时这五个农艺性状之间大多为负的偏相关,存在着不同程度的制约关系,分析提出了高产育种应以增大瘤茎横径为其主攻目标。
Studies on relationship among agronomic characters of the different growth period were carried out with correlations, regression and path analysis by using 21 tumorous stem mustard varieties.The results showed that there existed positive simple correlation among agronomic characters.Partial correlation analysis showed that there were significantly and positively partial correlation between the whole plant fresh weight of the beginning period,leaf width,fresh weight and vertical length of tumorous stem,between tumorous stem fresh weight and the whole plant fresh weight in the middle period, and between yield per plant stem fresh weight of and tumorous in the beginning period, leaf length,,vertical length, horizontal length and the ratio between tumorous stem fresh weight and leaf fresh weight of bud appearance period. Significantly and negatively partial correlation between tumorous stem fresh weight of beginning period and vertical length and horizontal length, between leaf width of beginning period and the whole plant fresh weight of the middle period, between vertical length and horizontal length, and between yield per plant and the whole plant fresh weight of the beginning period was observed.Multiple step regression and path analyses showed that partial regression coefficients and path coefficients of tumorous stem fresh weight of the beginning and middle periods, leaf length, vertical length and horizontal length of bud appearance period to yield per plant were significant. The trait,which contributed the most to yield per plant,was horizontal length,then vertical length,then leaf length of bud appearance period,then tumorous stem fresh weight in the middle period,then tumorous stem fresh weight in the beginning period,and there existed negatively partial correlation among the 5 agronomic characters.It suggested that the main approach of high yield breeding was to increase the horizontal length.
出处
《西南农业学报》
CSCD
2004年第5期633-635,共3页
Southwest China Journal of Agricultural Sciences
基金
国家科委重点科技项目
重庆市科委"九五"育种攻关项目
关键词
茎瘤芥
农艺性状
相关分析
多元逐步回归分析
通径分析
tumorous stem mustard
agronomic character
correlation analysis
multiple step regression analysis
path analysis
