| 一个新的水稻小粒矮秆基因的分子标记定位及效应分析 |
| |
| 引用本文： | 李秀兰,吴成,邓晓建,王平荣,李仁端,杨志荣.一个新的水稻小粒矮秆基因的分子标记定位及效应分析[J].Acta Botanica Sinica,2003,45(7):757-761. |
| |
| 作者姓名： | 李秀兰 吴成 邓晓建 王平荣 李仁端 杨志荣 |
| |
| 作者单位： | [1]四川农业人学水稻研究所，成都611130 [2]四川大学生命科学学院，成都610064 |
| |
| 摘 要： | 从水稻(Oryza safjva L．)半矮秆品种蜀恢I62中发现一份小粒矮秆突变体“I62d”。对I62d与4个半矮秆品种杂交F1和F2代的遗传分析表明，I62d的矮生性由一对隐性基因控制。以II-32B／162d F2代作定位群体，用分子标记将I62d突变基凶定位丁水稻第3染色体短臂，该基因与微卫星标记RM218和RMI57之间的遗传距离分别为3．5cM和10．0cM。同时，利用近等基因系分析了该基因的表型效应，结果表明它可使株高降为正常高度的1／4左右，籽粒降为正常大小的1／4左右，并使叶片显著缩短、加宽，结实率显著降低。我们认为162d突变基因是一个新的水稻小粒矮秆某因，暂命名为dI62(t）。
|
| 关 键 词： | 水稻 矮秆基因 基因定位 微卫星标记 基因效应分析 |
Molecular Tagging and Effect Analysis of a New Small Grain Dwarf Gene in Rice |
| |
| Authors: | LI Xiu-Lan WU Cheng DENG Xiao-Jian WANG Ping-Rong LI Ren-Duan YANG Zhi-Rong |
| |
| Abstract: | Plant height is one of the important agronomic traits of rice. Over higher plant would easily result in plant lodging and output reducing. On the other hand, the dwarf varieties with proper plant height had higher lodging resistance and a greater harvest index, allowing for the increased use of nitrogen fertilizer. Dwarf breeding had made a great breakthrough in the rice breeding. The breeding and extension of excellent dwarf varieties remarkably improved the yield potential of rice. Therefore, the plant height is still one of the focuses in rice genetic research. |
| |
| Keywords: | Oryza sativa dwarf gene gene mapping microsatellite marker gene effect analysis |
| 本文献已被 CNKI 维普 等数据库收录！ |
