CAJ | 학술논문

对2倍体、3倍体和4倍体桑树的形态学和组织学差异进行了研究,测定了不同倍数性桑树的单条长度、株条长度、单叶重、单叶面积和气孔的叶绿体数.结果表明,所有这些数量性状在不同倍数性间都存在统计学上的显著差异.单条长与株条长度为3x＞2x＞4x,单叶重,叶面积和叶绿体数为4x＞3x＞2x.此特征可以作为多倍体育种程序中初始阶段鉴别与筛选不同倍数体的辅助指标.研究还表明,3倍体有着优良的经济性状,由两种杂交组合培育的三倍体中,平均单条长2x♀×4x显著长于4x♀×2x;从2倍体杂种实生苗诱导的4倍体比2倍体无性系诱导的4倍体有更好的经济性状.
대2배체、3배체화4배체상수적형태학화조직학차이진행료연구,측정료불동배수성상수적단조장도、주조장도、단협중、단협면적화기공적협록체수.결과표명,소유저사수량성상재불동배수성간도존재통계학상적현저차이.단조장여주조장도위3x＞2x＞4x,단협중,협면적화협록체수위4x＞3x＞2x.차특정가이작위다배체육충정서중초시계단감별여사선불동배수체적보조지표.연구환표명,3배체유착우량적경제성상,유량충잡교조합배육적삼배체중,평균단조장2x♀×4x현저장우4x♀×2x;종2배체잡충실생묘유도적4배체비2배체무성계유도적4배체유경호적경제성상.
A study on the morphological and histological differences among diploids,triploids and tetraploids of mulberry was carried out.All the ploids were evaluated for total length of branches per plant,length of single branch,single leaf weight,single leaf area and stomatal chloroplast number.The results have shown statistically significant differences among the ploids for all the parameters.Height of the plant was found to be 3x＞2x＞4x.Single leaf weight,leaf size/area and chloroplast number were 4x＞3x＞2x.These characters can be adopted as an auxiliary index for distinguishing and screening of mulberry ploids at primary level.The study also suggests that the triploids have superior economic characters and the single branch length of 3x bred from 2x♀×4x was significantly longer than that from 4x♀×2x within the same ploidy level.Tetraploids induced from hybrid seedling diploids were much better than that induced from vegetative parts of diploids.