在自然条件下,月季由于受外界因素的刺激,如温度、光照、射线、渗透压的改变等物理因素以及各种植物碱、生长激素等化学因素的影响而使细胞核内染色体发生变异和基因突变,改变原有性状,引起芽变。在月季育种上,常常利用植物体细胞的突变——芽变来培育新品种。利用芽变育种,可不通过有性杂交和播种,便能获得新的花色、花型和树姿等优良性状的新品种。在自然界中,月季芽变频率较高,月季芽变品种极多,因此月季芽变具有 Under natural conditions, due to the external factors such as temperature, light, radiation, osmotic pressure and other physical factors, as well as various plant alkaloids, growth hormone and other chemical factors that make the nucleus chromosome mutation and gene mutation , Change the original traits, causing buds change. In rose breeding, plant somatic mutation-shoot transformation is often used to cultivate new varieties. By using mutated breeding, new varieties with excellent traits such as flower color, flower pattern and tree pose can be obtained without sexual crossing and sowing. In nature, the high frequency of rose buds, rose varieties are very many, so the rose bud has