Improvement Effect of Mixed Selection under Different Ecological Conditions on Comprehensive Agronomic Traits of Four Maize Populations
This study utilized two temperate and two subtropical populations as experimental materials,a round of mass selection was implemented in tropical,the subtropical,and temperate environments,followed by a genetic equilibrium process.In the subsequent year,comprehensive agronomic trait identification was conducted at 4 sites to evaluate the improvement effects of the four populations under mixed selection across various ecological condi-tions.The results showed that the plant height and ear height of the temperate population exhibited the best improve-ment effect in the temperate environment.The improvement effect of ear diameter,rows per ear,and 100-kernels weight was the best in tropical and subtropical environments.The plant height,ear height,ear length,bald tip length,and yield per plant of subtropical populations had the best improvement effects in tropical and subtropical environments.The improvement effect of ear diameter and rows per ear was the best in temperate environments.The improvement effects of ear length,kernels per rows,bald tip length,yield per plant in temperate populations,as well as kernels per rows and 100-kernels weight in subtropical populations varied depending on ecological conditions.
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