斑茅BC_1品系及其亲本性状差异初步研究  

Preliminary Studies on the Difference of Characters between BC_1 Lines of E.arundinaceus and Their Parents

作　　者：陈勇生[1] 邓海华[1] 梁计南[2] 李奇伟[1] 谭中文[2] 

机构地区：[1]广州甘蔗糖业研究所,广州510316 [2]华南农业大学,广州510642

出　　处：《甘蔗糖业》2006年第3期1-6,11,共7页Sugarcane and Canesugar

基　　金：广东省自然科学基金(020360)资助

摘　　要：以10个斑茅BC1品系及其亲本YC96-40和CP84-1198为材料,在大田生产条件下,对它们在农艺、经济性状方面的差异作了研究。结果如下:农艺与经济性状,斑茅BC1品系的大多数性状表现为双亲中间型。在回交过程中,蔗汁锤度、转光度和蔗糖分改良速度较快,最高的YCE01-80分别为16.69%、14.25%和14.49%,这些性状已接近栽培品种;蔗茎产量出现较多超高值亲本,最高产量品系YCE01-111比父本CP84-1198产量高40.45%。但是,斑茅后代细茎、易倒伏等不良性状改良进展仍然较慢;分蘖率、株高及其生长速和有效茎数表现出多样性。聚类分析结果发现,大多数品系与双亲在蔗茎产量上的遗传距离较大。对这10个斑茅BC1品系各个性状的比较,初步认为YCE01-111无论在萌芽率、分蘖率、株高、株高生长速、有效茎数等重要农艺性状上,还是经济性状如蔗茎产量、蔗汁锤度、蔗汁转光度、蔗汁蔗糖分等,都表现较好。Ten BC1 lines of E. arundinaceus and their parents were selected to study the difference in agronomical and economical characters under field conditions. The results indicated that means of BC1 lines were in the range of two parents for most agronomical and economical characters. During the backcross process, rapid improvement was gained in such characters as Brix, polarization and sucrose content in cane juice. YCE01-80 had the highest value in these three indexes, which were 16.69%, 14.25% and 14.49%, respectively, and closed to the values of cultivated variety. The cane yields of most BC1 lines studied were higher than the parents, and YCE01-111 was 40.45% higher than the male parent CP84-1198 in cane yield. But improvement in thin and pithy stalks remained relatively slow. Characters including tillering rate, plant height, plant growing rate and millable stalks per hm^2 presented diversity. By cluster analysis on cane yield, the genetic distance among most BC1 lines and parents was large. By making a comparison among the BC1 lines, preliminary results indicated that YCE01-111 was better than the others not only in such important agronomical characters as germination rate, tillering rate, plant height, plant growing rate and millable stalks per hm^2, but also in such economical ones as the cane yield, brix, polarization, sucrose content in cane juice and fiber content of cane.

关 键 词：甘蔗 斑茅 BC1品系 聚类分析 

分 类 号：S511[农业科学—作物学] S543.9