不同氮磷条件下玉米产量和灰斑病抗性的配合力分析  

Combining Ability Analysis of Yield and Resistance to Gray Leaf Spot of Maize under Different Nitrogen and Phosphorus Conditions

作　　者：王庭照 蒋辅燕 张玉东 尹兴福 王一竹 冉枫云 番兴明[2] WANG Ting-zhao;JIANG Fu-yan;ZHANG Yu-dong;YIN Xing-fu;WANG Yi-zhu;RAN Feng-yun;FAN Xing-ming(College of Agronomy and Biotechnology,Yunnan Agricultural University,Kunming 650201;Institute of Food Crops,Yunnan Academy of Agricultural Sciences,Kunming 650205,China)

机构地区：[1]云南农业大学农学与生物技术学院,昆明650201 [2]云南省农业科学院粮食作物研究所,昆明650205

出　　处：《玉米科学》2025年第4期17-26,共10页Journal of Maize Sciences

基　　金：国家自然科学基金项目(31961143014);云南省重大科技专项项目(202102AE090023);云南省种子种业联合实验室项目(202205AR070001)。

摘　　要：以3个测验系(T1~T3)和10个被测系(L4~L13)为亲本,按照NCII遗传交配设计对低磷肥、低氮肥和正常氮磷肥3个施肥水平下玉米的产量及灰斑病评分的配合力和遗传参数进行评估。结果表明,在低磷和低氮处理下,30个杂交组合的灰斑病评分显著低于正常氮磷处理,产量没有显著降低。测验种T3(D39)与被测系L7(YML524)和L10(YML545)在不同处理下的产量一般配合力为正值且相对较高;低氮/低磷条件下灰斑病评分的GCA与正常氮磷下存在显著差异。不同处理条件下,灰斑病评分均较低的自交系为T3、L7、L10,T1×L10灰斑病评分特殊配合力表现为显著负效应。相关性分析表明,杂交组合亲本的一般配合力之和(GCAs)与F1产量及抗病性均呈极显著正相关(P<0.01)。综上,T3(D39)、L7(YML524)、L10(YML545)在灰斑病抗性和产量方面的GCA效应较好,综合表现最优。This study used three test lines(T1-T3)and ten tested lines(L4-L13)as parents and made 10×3=30 crosses according to NCII genetic design.Combining ability and some genetic parameters have been evaluated on GY and GLS scores(GLSS)with three treatments of low phosphorus fertilizer,low nitrogen fertilizer and normal nitro⁃gen and phosphorus fertilizer.The results showed that the GLSS for the 30 crosses with low phosphorus and low ni⁃trogen treatments was significantly lower than that under normal nitrogen and phosphorus treatments,while no signif⁃icant GY loss was observed.With all three treatments,the general combining ability(GCA)of GY was positive and relatively high for the test line of T3(D39)and the tested lines of L7(YML524)and L10(YML545).The GCA of GLSS with low nitrogen or low phosphorus treatments was significantly different from that with normal nitrogen and phos⁃phorus treatment.The inbred lines with significantly low GLSS with different treatments were T3,L7,L10.The SCA of T1×L10 GLSS showed significant negative effect.Correlation analysis showed that the sum of GCA(GCAs)on GY and GLSS for the parent lines of the crosses was significantly positively correlated with the phenotypic value of F1(P<0.01).In summary,T3(D39),L7(YML524),L10(YML545)andhad better GCA effect on GLS resistance and GY,and the overall performance was the best.

关 键 词：玉米 低氮/低磷 产量 灰斑病 配合力 

分 类 号：S513.035[农业科学—作物学]