共查询到20条相似文献,搜索用时 171 毫秒
1.
2.
3.
当前我国玉米育种的现状、目标与方法探讨 总被引:1,自引:0,他引:1
当前我国玉米育种素材多为二环系,种质基础十分狭窄,严重制约了突破性杂交种的选育,优良自交系和杂交种的匮乏以及高产栽培技术的不完善是现在玉米单产停滞不前的重要原因,利用各地独特的地域和资源优势,运用现代科学的种质创新技术,拓宽创新种质资源,特别是引进外来自交系是提高玉米育种水平,进行轮回选择和突破杂交种选育的重要途径,对提高玉米单产、稳定总产具有重要意义. 相似文献
4.
5.
6.
高淀粉玉米的研究现状及品种选育 总被引:6,自引:0,他引:6
对高淀粉玉米的类型及其在淀粉工业领域的加工利用现状进行了综述。通过分析目前高淀粉玉米的种质资源利用现状以及高淀粉玉米自交系和杂交种的选育情况,提出了不同类型高淀粉玉米品种的育种目标,探讨了高淀粉玉米种质创新改良、自交系选育的方法和杂交种选配的策略。 相似文献
7.
8.
9.
10.
5份美国先锋玉米种质资源的配合力分析 总被引:3,自引:0,他引:3
通过对近年来从美国先锋公司引进的5份玉米种质资源(玉米自交系PH4CV、PH5 AD、PHB1M、PHP-MO、PH6AT)进行配合力分析研究,发现自交系PH4CV、PH5AD的配合力较高,能有效地改良辽宁省玉米自交系,扩大种质资源的利用,加快育种进程. 相似文献
11.
玉米芽期抗旱性研究初报 总被引:4,自引:0,他引:4
[目的]筛选芽期抗旱性强的材料,为玉米抗旱性育种提供新的种质资源。[方法]采用19.2%的PEG-6000水溶液为水分胁迫剂,对44份玉米种质进行芽期抗旱性鉴定,测定其萌发指数和抗旱指数。[结果]44份玉米种质中芽期抗旱性极强的有5份,抗旱性强的20份,其余19份均为中等抗旱性材料。显著性测验分析表明,N4号、N54-1号和武鸣1号3份种质萌发指数和抗旱指数显著或极显著地高于其他种质。[结论]44份玉米种质芽期抗旱性均较好,可作为玉米抗旱性育种的种质资源,具有较大的开发利用价值。 相似文献
12.
玉米芽期抗旱性研究初报(英文) 总被引:10,自引:2,他引:8
The drought resistances of 44 maize germplasms at budding stage were studied with 19.2% polyethylene glycol(PEG-6000)in order to provide new germplasm resource for drought resistance breeding of maize.The results showed there were five extremely high drought resistance germplasms,20 germplasms with high drought resistance,and 19 germplasms with medium drought resistance.The significance testing was also used to demonstrate that the germination index(GI)and germination of drought resistance index(GDRI)of N4,N54-1 and Wuming No.1 were dramatically remarkable than others.The conclusion was that the 44 maize germplasm had good drought resistance and could be used as germplasm resource of the drought resistance breeding of maize,which had a great value of development and utilization. 相似文献
13.
《(《农业科学与技术》)编辑部》2008,(4)
The drought resistances of 44 maize germplasms at budding stage were studied with 19.2% polyethylene glycol(PEG-6000)in order to provide new germplasm resource for drought resistance breeding of maize.The results showed there were five extremely high drought resistance germplasms,20 germplasms with high drought resistance,and 19 germplasms with medium drought resistance.The significance testing was also used to demonstrate that the germination index(GI)and germination of drought resistance index(GDRI)of N4,N54-1 and Wuming No.1 were dramatically remarkable than others.The conclusion was that the 44 maize germplasm had good drought resistance and could be used as germplasm resource of the drought resistance breeding of maize,which had a great value of development and utilization. 相似文献
14.
Pilot Study of Drought Resistance for Maize at Budding Stage 总被引:1,自引:0,他引:1
ZHANG Zhen-wen CHEN Li-zhen ZHEN Yong-qin WU Chuan-yi Tropical Crops of Genetic Resources Institute Chinese Academy of Tropical Agricultural Science Danzhou 《(《农业科学与技术》)编辑部》2008,(4)
The drought resistances of 44 maize germplasms at budding stage were studied with 19.2% polyethylene glycol(PEG-6000)in order to provide new germplasm resource for drought resistance breeding of maize.The results showed there were five extremely high drought resistance germplasms,20 germplasms with high drought resistance,and 19 germplasms with medium drought resistance.The significance testing was also used to demonstrate that the germination index(GI)and germination of drought resistance index(GDRI)of N4,N54-1 and Wuming No.1 were dramatically remarkable than others.The conclusion was that the 44 maize germplasm had good drought resistance and could be used as germplasm resource of the drought resistance breeding of maize,which had a great value of development and utilization. 相似文献
15.
16.
玉米种质资源的背景与利用现状的研究(英文) 总被引:3,自引:0,他引:3
[目的]介绍玉米种质资源的背景及利用现状。[方法]综述了国内外玉米种质资源的遗传背景与利用途径方面的研究进展,包括玉米的杂种优势群及杂优模式,及其在育种中的灵活应用,以及各种类型原始材料的利用方法。[结果]表明种质资源是玉米育种的前提和基础,深入认识和合理选择种质资源,可以显著提高育种效率,加快育种进程。同时认为,在玉米育种原始材料的选择和构建中,不能仅仅局限于杂种优势群和杂种优势模式,还要根据不同类型的种质资源,以及个人的育种目标和思路加以合理利用。[结论]为国内的玉米育种工作开阔思路,提供启示。 相似文献
17.
18.
19.
20.
地方种质资源在我国玉米育种中的利用 总被引:10,自引:0,他引:10
回顾我国地方玉米种质资源的历史和现状,分析地方玉米种质资源在我国玉米育种中的作用,指出利用地方玉米种质资源可以拓宽温带种质的玉米遗传基础,构建新的杂种优势模式,产生出超强优势的杂交玉米新组合,提出了地方玉米种质资源的利用途径及方法. 相似文献