中国农业科学 ›› 2025, Vol. 58 ›› Issue (20): 4100-4116.doi: 10.3864/j.issn.0578-1752.2025.20.006

• 耐盐碱品种选育 • 上一篇    下一篇

新育中单系列玉米杂交种与亲本自交系的耐盐性评价

曲海悦1(), 韩洁楠1(), 李冉1, 张泽1,2, 刘倩倩1, 郝转芳1, 翁建峰1, 张德贵1, 周志强1, 许振南1, 荣子国3, 王菊英3, 雍洪军1,3(), 李明顺1()   

  1. 1 中国农业科学院作物科学研究所,北京 100081
    2 黑龙江八一农垦大学农学院,黑龙江大庆 163319
    3 国家盐碱地综合利用技术创新中心,山东东营 257347
  • 收稿日期:2025-05-28 接受日期:2025-07-25 出版日期:2025-10-16 发布日期:2025-10-14
  • 通信作者:
    雍洪军,E-mail;
    李明顺,E-mail:
  • 联系方式: 曲海悦,E-mail:ndhxhywxgm@163.com。韩洁楠,E-mail:hanjienan@caas.cn。曲海悦与韩洁楠为同等贡献作者。
  • 基金资助:
    中国农业科学院重大科技任务(CAAS-ZDRW202402); 中国农业科学院重大科技任务(CAAS-ZDRW202407); 山东省重点研发计划(2023LZGC010); 山东省重点研发计划(农业良种工程)(ZDYF2023LZGC001); 国家玉米产业技术体系(CARS-02-01); 国家玉米产业技术体系(CARS-02-02)

Evaluation of Salt Tolerance in Newly Developed Zhongdan Series Maize Hybrid Varieties and Their Parental Inbred Lines

QU HaiYue1(), HAN JieNan1(), LI Ran1, ZHANG Ze1,2, LIU QianQian1, HAO ZhuanFang1, WENG JianFeng1, ZHANG DeGui1, ZHOU ZhiQiang1, XU ZhenNan1, RONG ZiGuo3, WANG JuYing3, YONG HongJun1,3(), LI MingShun1()   

  1. 1 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081
    2 College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang
    3 National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, Dongying 257347, Shandong
  • Received:2025-05-28 Accepted:2025-07-25 Published:2025-10-16 Online:2025-10-14

摘要:

【目的】探究新育玉米杂交种及其亲本自交系苗期耐盐相关性,评价苗期耐盐性较强杂交种的全生育期耐盐能力,为培育盐碱地适种玉米杂交种提供资源与数据支撑。【方法】以16份杂交种及其30份亲本自交系为材料,于2024年在中国农业科学院作物科学研究所人工温室开展苗期耐盐性鉴定,分别设置2个处理:CK(对照处理)和SA(盐胁迫处理),通过测定苗期株高和生物量,对杂交种及其亲本自交系进行耐盐性和相关性分析;筛选耐盐性不同的杂交种,分析最新展开叶黄化百分比和Na+含量,进一步验证其耐盐性;选择黄淮海夏播新品种中单1130和中单1112及东北春播新品种中单1118进行萌发期耐盐鉴定,并在山东省东营市滨海盐碱地进行产量测定。【结果】在350 mmol·L-1 NaCl胁迫下,16份杂交种苗期株高、地上部鲜重及干重较对照下降53.73%—74.65%,郑单958、中单1130、中单1112和中单1118等7份杂交种形态指标及耐盐系数显著高于均值,耐盐能力强;250 mmol·L-1 NaCl胁迫下验证部分杂交种耐盐性,发现耐盐杂交种郑单958、中单1130最新展开叶黄化百分比显著低于不耐盐的中单153和中单123,且地上部Na⁺含量更低。与双亲耐盐相关性分析显示,杂交种地上部鲜重耐盐系数及盐胁迫下苗情均与母本组苗情显著相关(P<0.05)。通过KASP检测发现杂交种耐盐性与双亲自交系中供测4个耐盐基因的优良等位变异位点聚合个数无相关性。原位中低度盐碱地全生育期试验表明,新育杂交种中单1130产量达6 577.50—8 034.71 kg·hm-2,较郑单958增产14.35%—20.99%;中单1112产量达6 415.11—7 720.73 kg·hm-2,较郑单958不减产或增产7.22%—34.22%;中单1118产量达6 075.45—6 958.35 kg·hm-2,较郑单958增产5.62%—10.33%。【结论】玉米杂交种耐盐性与双亲耐盐性相关,但仅与母本苗情等级达显著水平。耐盐基因SOS1HKT2HAK4HKT1;2优良等位变异位点在亲本中的聚合个数与杂交种耐盐性无显著相关性。苗期耐盐性较强的新育杂交种中单1130,在山东东营滨海盐碱地较郑单958稳定增产14.35%以上,是适宜黄淮海地区播种的高产耐盐碱新品种。

关键词: 玉米, 新育杂交种, 亲本, 耐盐性, 产量

Abstract:

【Objective】The aim of the present study was to explore the correlation between seedling-stage salt tolerance in newly developed maize hybrids and salt tolerance in their parental inbred lines, evaluate the full growth-stage salt tolerance of hybrids with high seedling-stage salt tolerance, and provide resources and data support for development of maize hybrids suitable for saline-alkaline soils.【Method】Sixteen hybrid varieties and 30 parental inbred lines were used as materials for evaluating seedling-stage salt tolerance in 2024. The experiments were conducted in greenhouses at the Institute of Crop Science, Chinese Academy of Agricultural Sciences. Two treatments were applied: CK (control) and SA (salt stress treatment). Seedling-stage salt tolerance and correlation analyses were performed by measuring seedling height and biomass. Salt-tolerant hybrids were selected, and leaf yellowing percentage and sodium ion (Na+) content were analyzed in the latest developed leaves to further validate their salt tolerance. Additionally, salt tolerance during the germination stage was tested in hybrid varieties Zhongdan 1130, Zhongdan 1112, and Zhongdan 1118, and yield measurements were carried out in saline-alkaline soils of Dongying City, Shandong Province.【Result】Under 350 mmol·L-1 NaCl stress, seedling height, fresh weight, and dry weight of the 16 hybrid varieties decreased by 53.73%-74.65% when compared with those in the control. Seven hybrids, including Zhengdan 958, Zhongdan 1130, Zhongdan 1112, and Zhongdan 1118, exhibited significantly higher morphological indices and salt tolerance coefficients than the average, demonstrating high salt tolerance. Under 250 mmol·L-1 NaCl stress, salt tolerance was validated for some hybrids. Zhengdan 958 and Zhongdan 1130 exhibited significantly lower leaf yellowing percentages and Na+ contents in their aboveground parts than the salt-sensitive hybrids Zhongdan 153 and Zhongdan 123. Correlation analysis between the salt tolerance of the hybrids and those of their parental lines revealed that the salt tolerance coefficient of the aboveground fresh weight and seedling condition under salt stress of hybrids was significantly correlated with maternal line seedling condition (P<0.05). Kompetitive allele specific PCR analysis indicated no correlation between salt tolerance of hybrids and number of favorable allelic variations at the four salt tolerance loci in the parental inbred lines. In situ trials in moderately saline-alkaline soils throughout the entire growth stage showed that Zhongdan 1130 had a yield of 6 577.50-8 034.71 kg per hectare, which was 14.35%-20.99% higher than that of Zhengdan 958. Zhongdan 1112 yielded 6 415.11-7 720.73 per hectare, with either no yield reduction or an increase of 7.22%-34.22% when compared to that of Zhengdan 958. Zhongdan 1118 yielded 6 075.45-6 958.35 kg per hectare, with a yield increase of 5.62%-10.33% when compared to that of Zhengdan 958. 【Conclusion】Salt tolerance of maize hybrids is correlated with that of parental lines; however, the correlation is significant only with the seedling condition of the maternal line. The number of favorable allelic variations in the salt-tolerance genes SOS1, HKT2, HAK4, and HKT1;2 in the parental lines was not significantly correlated with the salt tolerance of the hybrids. The newly developed hybrid Zhongdan 1130, which has high seedling-stage salt tolerance, exhibited a stable yield increase of > 14.35% in saline-alkaline soils in Shandong compared to that of Zhengdan 958, making it a suitable, high-yielding, salt-tolerant variety for adoption in the Huang-Huai-Hai region.

Key words: maize, newly bred hybrids, parental, salt tolerance, yield