同异联系势分析法在玉米杂交种综合评价中的应用

根据玉米品比试验6个点的数据,对参试的14个玉米杂交种的13个主要性状进行同异联系势分析。结果表明,参试杂交种LZ11、LZ2、LZ4、LZ7和LZ8与理想品种的联系度在0.757 2～0.889 7之间,综合表现优良,可考虑参加玉米区域试验预试;其余品种表现良好或一般,需进一步试验观察。同异联系势分析法可以用于综合评价玉米杂交种的丰产性和稳产性,能够比较全面准确地判断玉米杂交种的优劣。

Application on Similarity-difference Connection Trend for Comprehensive Evaluation of Maize Hybrid

Analysis of similarity-difference connection trend were used to evaluate the 14 maize hybrids according to the data of 6 maize test points, which 13 major characters were involved. The result showed that the connection degree between 5 maize hybrids(LZ11, LZ2, LZ4, LZ7 and LZ8) and the ideal variety was 0.757 2 - 0.889 7. The comprehensive traits were excellent, so these maize hybrids should be the maize variety regional trial. The other maize hybrids need to be observed and tested further. The analysis of similarity-difference connection trend could estimate the yield productivity and stability simultaneously. It could determine the advantage and disadvantage of maize hybrid comprehensively and accurately.