中图分类号 S513 文献标识码A 文章编号 1007-7731(2025)15-0006-04

DO1号10.16377/j.cnki.issn1007-7731.2025.15.002

Breeding and characteristicsof maize variety Luoyu 198

LI Xiaodong LEI Xiaobing LIANG Xiaowei NING Longlong (Luoyang Academy of Agricultural and Forestry Sciences，Luoyang 471O23， China)

AbstractTheparental sources andbreeding process of the maize variety Luoyu198 were introduced，and its agronomic traits，disease resistance，qualityand yield were comprehensively analyzed based on itsperformance in the Henan Province science-enterprise win-win corn consortium trials.The varietywas developed bycrossing the female parent L198X with the male parent Z198Y to createa high yielding maize hybrid，the variety was approved by the Henan Provincial Crop Variety Approval Committeein2022 (Approval No. Yushenyu 20220046).Interms of characteristics，the varietywas tested intheregional and production trialsof the Henan Province science-enterprise win-win corn consortium from 2O2O to 2O21.Under summer sowing conditions in the study area，its growth period ranged from 99.9 to 103.4 days，anditsplant height variedbetween249.3and276.5cm，with good field performance.Through inoculation identification，the variety was found to be resistant to southern corn leaf blight and fusarium ear rot. The protein content of its kernels ranged from 9.39% to 9.89 % ，the crude starch content ranged from 75.11% to 75.32% ， indicating high quality. The average yield of Luoyu 198 was recorded between 8 080.05 and 10876.80kg/hm² ，representing a yield increase of 9.32% to 12.55% compared to the control variety Zhengdan 958.With a high yieldincreasingrateandalowcoeficient of variation，thevarietydemonstrated excelent high yieldpotential，stability，andadaptability.Thisstudyprovidesareference forthe largescalepromotionand cultivation of this variety.

KeywordsLuoyu 198;agronomic traits;high yield potential; stability;adaptability

黄淮海地区是玉米主产区之一，种植面积较大。该地区属温带大陆性季风气候区，玉米生长期间水热同期，农业气候资源较为丰富。该地区气温高、蒸发量大、夏季降水较集中，玉米种植过程中，可能遇播种期缺水，抽雄、散粉期降水量大，灌浆期降水量不足等[1-2]。培育高产、稳产、抗逆、优良的玉米品种是提高玉米单产的有效方法之二3]。王静等4研究指出，浚单58具有丰产性好、抗性强、稳产和适应性广等特点，适宜在黄淮海地区种植。郜江晶5研究指出，因地制宜选择优质玉米品种，通过合理密植等措施可保障玉米高产栽培。洛玉198是以高产、耐密、抗逆为育种目标，采用常规育种技术和单倍体诱导育种等现代技术相结合，2017年春以L198X为母本、Z198Y为父本组配的优质玉米品种，同年参加夏玉米组合鉴定试验，表现优异。

本文介绍了洛玉198的亲本来源及选育过程，并结合该品种在河南省科企共赢玉米联合体试验中的种植表现，对其农艺性状、抗病性、品质和产量等进行综合分析，为该品种的大面积示范推广提供参考。

1亲本来源及选育过程

1.1亲本来源

1.1.1母本L198X 2015年，以先玉1568玉米杂交种为原始材料，经过洛阳、海南两地不间断3代自交选优，随后经单倍体诱导加倍后选优，于2017年选育出稳定优良自交系L198X。该自交系株型紧凑、花药黄、花丝绿、茎秆韧性好、半硬粒、白轴。

1.1.2父本Z198Y 2014年，以洛1526（郑单958二环系）与HCL645杂交，经过连续7代自交优选而成自交系Z198Y。该自交系株型半紧凑、花药黄、花丝红、半硬粒、白轴，耐高温干旱、耐密、雄穗发达、结实性好，较早熟。……