玉米新品种郑玉821选育  

Breeding of a New Maize Variety Zhengyu 821

作　　者：王保林[1] 冯贝贝 夏千惠 别海[1] 乔旭[1] 王金召[1] WANG Baolin;FENG Beibei;XIA Qianhui;BIE Hai;QIAO Xu;WANG Jinzhao(Zhengzhou Research Institution of Agricultural and Forestry Science,Zhengzhou,Henan 450005,China)

机构地区：[1]郑州市农林科学研究所,河南郑州450005

出　　处：《作物研究》2023年第4期405-408,共4页Crop Research

基　　金：河南省科技攻关项目(162102110023);郑州市重大科技创新专项(188PCXZX803)。

摘　　要：郑玉821是郑州市农林科学研究所以郑7246为母本、郑7668为父本杂交育成的玉米新品种。该品种株型紧凑,耐密植,适宜密度75 000株/hm^(2);高产稳产,耐水肥,2020年河南省区试平均产量10 323 kg/hm^(2),比郑单958(CK)增产8.2%,2021年河南省区试平均产量8 712 kg/hm^(2),比郑单958(CK)增产11.0%,增产点率100%;抗病性好,高抗或抗茎腐病、小斑病和穗腐病等病害;品质优,容重780 g/L以上。介绍了郑玉821的选育过程、特征特性与产量表现。New maize hybrid Zhengyu 821 was bred with in-bred line Zheng 7246 as the female parent and inbred line Zheng 7668 as the male parent by Zhengzhou Research Institution of Agricultural and Forestry Science.It was approved by Henan Crop Variety Approval Committee in 2022.Zhengyu 821 was compact and tolerant to dense planting,and which optimum planting density was 75 000 plants/hm^(2).It also had the characteristics of high-stable yield and water-fertilizer resis-tance.The average yield of Zhengyu 821 in the test group of Henan maize regional trials in 2020 was 10 323 kg/hm^(2),which was increased by 8.2% compared with Zhengdan 958.In addition,the average yield of Zhengyu 821 in 2021 was 8 712 kg/hm^(2),which increased by 11.0% compared with Zhengdan 958.The tested sites with yield increased each year accounted for 100% of the total tested sites.Identification of disease resistance of crop varieties suggested that Zhengyu 821 was highly resistant or resistent to Fusarium stem rot,Small Spot Disease and Fusarium ear rot,and other major maize diseased.The quality of Zhengyu 821 was excellent,and the test weight of Zhengyu 821 seed was higher than 780 g/L.The breeding process,characteristics and yield performance of Zhengyu 821 were introduced.

关 键 词：玉米 育种 郑玉821 

分 类 号：S513.032[农业科学—作物学]