甘蔗宿根性与抗寒性初探

The Preliminary Study on Cold-resistance and Ratooning Ability of Sugarcane

用4×3不完全双列杂交的甘蔗实生苗，以严冬后的宿极成活率代表抗寒性，它根发苗数代表宿根性．讨论了甘蔗实生苗的宿极性与抗寒性，结果表明：1甘蔗的抗寒性与其它农艺性状几乎不存在相关，而宿根性则与有效茎存在显著的正相关。2抗寒性、宿根性之间存在极显著的正相关，但两者间仍然有区别；宿根性的好坏取决于所含割手密的血缘比重．3抗寒性与宿极性在遗传上有着明显的差异，通过亲本选择与组合的选配来提高甘蔗品种的抗寒性、宿根性是可行的。

This paper discussed the cold-resistance and ratooning ability of Sugarcanethrough cane seedling by 4×3 incomplete diallel design. The rcsults showed tha t: a.The cold-resistance was not cotrelated with the other agtonomic characters and the ratooning ability was positively cortlated with stalk of sugarcane significantly, b.Therw were certain differences between cold-resistance and tatooning ability a though they were highly positively correlated. The ratooning ability of variety depends on the blood telationship of S spontaneum. c. The cold resistance and ratooning ability has some differences in heredity. lt can be improved and ineteased by parent selection and crosses.