Breeding and Characteristic Analysis of a New Maize Cultivar'Zhaoyu215'with Double Approval for Grain and Silage
Grain and silage dual-purpose maize are of great significance in ensuring national food security and promoting the development of animal husbandry.In order to breed grain and silage dual-purpose maize varieties suitable for planting in tropical areas and provide reference for planting grain and silage dual-purpose maize vari-eties in Guangxi,one new maize variety'Zhaoyu215'was bred by female parent Q901 and male parent P1 107.The regional test of common maize in Guangxi showed that the average grain yield of'Zhaoyu215'in two seasons was 8 030 kg/hm2,which was 4.0％higher than the control variety of'Guidan162';and the production test showed that the average grain yield of'Zhaoyu15'in two seasons was 7 740 kg/hm2,which was 6.4％higher than the control va-riety.The regional test of silage maize in Guangxi showed that the average whole plant organism yield of'Zhaoyu215'in two seasons was 55 420 kg/hm2,which was 4.9％higher than the control variety;and the produc-tion test showed that the average whole plant organism yield of'Zhaoyu215'in two seasons was 49 587 kg/hm2,which was 7.4％higher than the control variety.The grain quality of'Zhaoyu215'of unit weight,crude protein con-tent,crude fat content,crude starch content and lysine content were 795 g/L,8.50％,5.1％,72.40％and 0.21％,re-spectively;and the whole plant organism quality of the contents of crude protein,starch,neutral detergent fibre,detergent fibre and dry matter were 7.18％,36.8％,49.4％,15.3％and 30.4％,respectively.'Zhaoyu215'has high resistance to large spot disease and stem rot,and resistance to small spot disease and ear rot during harvest.'Zhaoyu215'passed the approval of Guangxi common maize varieties(Approval No.Guishenyu 2020090)and si-lage maize varieties(Approval No.Guishenyu 2021089)in 2020 and 2021 respectively.'Zhaoyu215'was the first batch of grain and silage double approved maize varieties in Guangxi and could be planted in Guangxi or similar e-cological regions as grain and silage dual-purpose variety.
Double approval for grain and silageMaizeZhaoyu215BreedingCharacteristic
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