Correlation Analysis between Yield and Main Agronomic Traits of Fresh Corn in Spring Sowing Area
In order to explore the relationship between different agronomic traits and yield of fresh corn and to provide refe-rence for spring-sown fresh corn breeding,69 fresh corn varieties were collected in this experiment as materials,and va-riance analysis,correlation analysis,partial correlation analysis,and path analysis were performed on 18 agronomic traits,such as growth period,plant height,and yield to clarify the main agronomic traits affecting yield.The results showed that length of bare rip of ears was the trait with the largest coefficient of variation(176.93%),followed by Anthesis date-sil-king date(100.19%).Sowing date-seedling date,silking date-harvest date,ear length,ear diameter,number of rows per ear,number of kernels per row,and ear weight were highly significantly positively correlated with yield;plant height was significantly positively correlated with yield;seedling date-tasseling date,length of bare rip of ears were significantly nega-tively correlated with yield.The regression equation of 8 agronomic characters,which were days from emergence to heading(X2),days from heading to scattered powder(X3),ear height(X9),ear length(X11),bald tip length(X12),ear diameter(X13),number of grains per row(X15),ear quality(X16),and yield(Y)is Y=1828.30-39.88X2+366.41X3+11.94X9+48.51X11-270.09X12+414.40X13-123.05X15+33.73X16.Tasseling date-anthesis date,ear height were significantly posi-tively partial correlated with yield,ear weight was highly significantly positively partial correlated with yield,number of ker-nels per row was significantly negatively partial correlated with yield.Tasseling date-anthesis date,ear height,ear length,ear diameter,ear weight have a positive direct effect on yield,and seedling date-tasseling date,length of bare rip of ears,number of kernels per row have a negative direct effect on yield.Ear weight provided the highest positive direct effect on yield(0.866).In comprehensive analysis,when breeding high-yielding sweet corn varieties,attention should be paid to varieties with larger tassel quality,shorter barren tip length,shorter number of days from emergence to tasseling,higher tas-sel position,longer tassel length,and thicker tassel.
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