Preliminary Analysis on Key Agronomic Traits Relating to Biomass and Quality of Silage Maize
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摘要: 以29份不同农艺性状的青贮玉米材料组配54个杂交组合用于试验。经相关和通径分析,明确了影响青贮玉米生物产量的关键农艺性状为秸秆产量、茎粗、籽粒产量、节间数、株高、穗位高和苞叶数,建立了以青贮玉米生物产量为依变量的回归方程。通过对影响生物产量的农艺性状与品质性状相关性进行初步分析,发现对生物产量有关农艺性状的选择,并不会显著改变各个品质性状;但是对秸秆产量选育,将会降低粗蛋白含量、提高中性洗涤纤维和酸性洗涤纤维的含量,因此,在选育高产优质青贮玉米新品种时,要适当降低秸秆产量,提高籽粒产量,处理好秸秆产量和籽粒产量这一对矛盾。Abstract: Twenty-nine silage maize lines with different agronomic traits were used as parents to produce 54 hybrids by random crossing for this study.Correlation and path coefficient analyses were performed.The results showed that the straw yield,stem diameter,seed yield,node number,plant height,ear height and bract number were determined to be the key agronomic traits affecting the biomass of the silage maize.A regression equation on biomass of the maize was established.The result of the preliminary correlation analysis between biomass-related agronomic traits and quality attributes indicated that selection based on the biomass-related agronomic traits did not significantly affect the resultant maize quality,but breeding based on the straw yield-related agronomic traits reduced CP and improved NDF,as well as ADF.Therefore,in breeding new varieties of maize,considerations should be given on balancing the straw yield reduction and seed yield improvement in order to arrive at desirable high yield and good quality for the new crop variety.
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Key words:
- Silage maize /
- agronomic traits /
- path coefficient analysis
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