Qian Q, He P, Teng S, Zeng D L, Zhu L H
China National Rice Research Institute, Hangzhou 310006, China.
Yi Chuan Xue Bao. 2001;28(1):29-32.
Tiller angle is one of important characters that constitute plant type with great significance in breading. A pair of japonica/indica lines, which were significantly different in tiller angle, were used in this study. A DH population were constructed via anther culture of F1 hybrids. The tiller angles of 115 DH lines were measured. QTL analysis was conducted based on the constructed molecular linkage map. Three QTLs (qTA-9a, qTA-9b and qTA-12) were detected on chromosome 9 and 12 respectively, Their variation were 22.7%, 11.9% and 20.9% respectively and their additive effects were all negative, showing this character was controlled by genes from big tiller angle parent ZYQ8. The application of the tiller angle that was controlled by major genes and minor genes in rice breeding is also discussed.
分蘖角度是构成株型的重要性状之一，在育种中具有重要意义。本研究使用了一对分蘖角度差异显著的粳稻/籼稻品系。通过F1杂种的花药培养构建了一个DH群体。测量了115个DH系的分蘖角度。基于构建的分子连锁图谱进行了QTL分析。分别在第9和12染色体上检测到3个QTL（qTA - 9a、qTA - 9b和qTA - 12），它们的变异率分别为22.7%、11.9%和20.9%，且它们的加性效应均为负，表明该性状受大分蘖角度亲本ZYQ8的基因控制。还讨论了水稻育种中主基因和微基因控制的分蘖角度的应用。
