热带玉米群体墨白962在适应温带过程中的穗分化特性  

The characters of the spike differentiation of tropic maize population Mobai 962 among different generations during adapting to temperate zone

作　　者：李向拓[1] 张兴华[1] 李发民[1] 杨金慧[1] 毛建昌[1] 

机构地区：[1]西北农林科技大学农学院,陕西杨凌712100

出　　处：《干旱地区农业研究》2007年第1期216-218,共3页Agricultural Research in the Arid Areas

基　　金：农业部948项目(2003-Q03-3-5);西北农林科技大学博士基金

摘　　要：以墨白962的不同世代为材料、户单4号为对照研究了热带玉米群体在适应温带条件下穗分化特性。结果表明,墨白962雄穗穗分化中,经过适应性改良的C4分化阶段Ⅰ和Ⅲ所用时间分别比原始群体C0缩短了5 d和4 d,但是C4分化阶段Ⅱ和Ⅳ所用时间却比C0延长了4 d和1 d;墨白962雌穗分化中,C4穗分化阶段Ⅰ、Ⅲ和Ⅳ分别比C0缩短了9、3和2 d;C4的Ⅱ和Ⅴ两个分化阶段均比C0延长了3 d。随着改良世代的增加,墨白962雌雄穗分化阶段发生的时间间隔在缩短。无论是雌雄穗分化阶段经历时间,还是相同分化阶段开始发生时间的间隔,经过适应性改良的墨白962 C4都比原始群体C0更接近户单4号品种。In order to study the change of spike differentiation in tropic maize population during adapting to temperate, different generations of Mobai 962 and Hudan 4 # were taken as materials. The result indicated that the internal of differentiation phase Ⅰ and Ⅲ in improvement generation C4 was shorten by five days and foor days, respectively, compared with the process of Mobai 962 tassel development in original population Co, but the internal of differentiation phase Ⅱ and Ⅳ in C4 was four days and one day longer than Co, respectively. Compared with the process of Mobai 962 ear development in Co, the internal of phase Ⅰ , Ⅲ and Ⅳ in C4 was reduced by nine days, three days and two days, respectively, while the internal of phase both Ⅱ and Ⅴ in C was three days longer than Co. With increase of improvement generation, the gap of spike differentiation phase between tassel and ear of Mobai 962 would be reduced. Regardless of the internal of spike differentiation, the gap of different spike differentiation phase between tassel and ear, the improved generation C4 was more similar to Hudan 4 # than original population Co of Mobai 962.

关 键 词：热带玉米群体 适应性 品种改良 穗分化 

分 类 号：S513.01[农业科学—作物学]