作物学报 ›› 2013, Vol. 39 ›› Issue (01): 43-49.doi: 10.3724/SP.J.1006.2013.00043
姚坚强1,2,鲍坚东2,3,朱金庆1,桂毅杰2,沈秋芳2,胡伟民2,樊龙江2,*
YAO Jian-Qiang1,2,BAO Jian-Dong2,3,ZHU Jin-Qing1,GUI Yi-Jie2,SHEN Qiu-Fang2,HU Wei-Min2,FAN Long-Jiang2,*
摘要:
Waxy(Wx)基因是众多作物导致糯性突变的关键基因,在玉米作物群体内深入研究Wx基因对中国糯玉米品质育种和种质创新具有重要意义。本研究利用325份(309份来自中国,11份来自泰国和5份来自韩国)糯玉米种质材料做了wx基因突变类型的调查和表观直链淀粉含量(AAC)测定。结果表明, 中国糯玉米的wx基因的遗传多样性很低,主要存在wx-D7和wx-D10两种突变类型,占96.9%;中国北方及韩国的糯玉米wx基因突变类型都是wx-D7类型,南方及泰国糯玉米wx基因突变类型都是wx-D10类型;糯玉米地方品种的wx基因型以wx-D10为主,占78.9%,而商业杂交种和自交系的wx基因型以wx-D7为主,分别占88.7%和86.6%。分析表明,中国糯玉米商业杂交种和自交系的AAC均值较低(小于2.2%)且无显著差异,但地方品种的AAC均值较高;wx-D7基因型糯玉米的AAC均值低且变化幅度较小,而wx-D10基因型糯玉米的AAC均值最高且变化幅度较大。本文还讨论了中国糯玉米主要wx基因型的地理分布、起源以及其他的wx基因突变类型。
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