摘要
【研究目的】为发掘利用CIMMYT牧草生长繁茂和抗逆能力强等优良遗传特性,改良普通玉米材料的抗逆性和创制新型饲草材料。【方法】以CIMMYT牧草和4个普通玉米自交系为遗传交配材料,比较研究了CIMMYT牧草和4个杂交(回交)后代材料的植物学形态特征及其与普通玉米的差异。【结果】CIMMYT牧草能将其生长繁茂、分蘖力强、生物产量高的特性遗传给杂交后代材料,并有较强的世代传递能力;该牧草幼苗、植株及其生长习性、花器官、种子特征等与普通玉米差异明显,其与普通玉米的杂交后代基本保持了它的生长发育特性,但花器官和种子特征更偏向于普通玉米;回交后代除保持了一定的分蘖特性、明显的多穗和返祖现象外,其余特征特性与普通玉米基本没有区别。【结论】CIMMYT牧草生长繁茂和生物产量高的特性能遗传给杂交后代,世代传递能力较强,通过遗传改良途径,能将CIM-MYT牧草的优良特性转育到普通玉米中,培育出饲草玉米育种新材料。
It was studied the botanical morphology difference of CIMMYT forage and hybrid and backcross offspring with hybrid combination of CIMMYT forage and four common maize inbred lines as study material. The result indicated, the CIMMYT forage characteristics of the overgrowth, strong tillerity and high yield could inherit to the offspring, and the inherit ability was higher. It was obviously difference of seedling, plant, and its grow habit, flower apparatus and seed between CIMMYT forage and common maize. The hybrid offspring of CIMMYT forage and common maize keep the strong trait of growing and development, but the flower and seed character were look like common maize. The baekcross offspring were not different to common maize besides with some tillers, distinct multi-ear and atavism.
出处
《中国农学通报》
CSCD
北大核心
2009年第16期8-12,共5页
Chinese Agricultural Science Bulletin
基金
重庆市自然科学基金项目(CSTC
2007BB1223)
重庆市水稻玉米重大专项玉米育种材料创新项目(CSTC
2007AA1022)
高产多抗优质玉米新品种培育(CSTC
2007AA1017)
杂交玉米育种新技术与新方法研究(CSTC
2007AB1045)资助
