云瑞15系列不同杂交途径甘蔗创新种质DTOPSIS综合评价

近年来瑞丽育种站为了获得突破性创新亲本,在F1(栽培原种×栽培原种,或栽培原种×野生种)间相互杂交获得对等F2代,再以F2×F2获得对等F3代,按此“对等杂交”方式着力构建独立亲本系统。在云瑞15系列123份创新材料中,有56份对等F2代(A类)、22份对等F1-BC1代(对等F1代与商业种杂交1次,B类)、11份对等F1-BC2代(对等F1代与商业种杂交2次,C类)、23份对等F2-BC1代(对等F2代与商业种杂交1次,D类),以及11份传统高贵化杂交F3代(野生种与传统亲本或品种杂交3次,E类)。本研究通过采用DTOPSIS法对甘蔗株高、茎径、单茎重、有效茎数、蔗产量、锤度、含糖量进行综合评价,结果表明:⑴接近度Cg值最大的10份材料分别是:云瑞15-88(对等F1-BC1,B类)、云瑞15-150(对等F1-BC2,C类)、云瑞15-153(F3,E类)、云瑞15-158(F3,E类)、云瑞15-127(对等F1-BC1,B类)、云瑞15-155(F3,E类)、云瑞15-90(对等F2-BC1,D类)、云瑞15-29(对等F2,A类)、云瑞15-97(F3,E类)、云瑞15-134(对等F1-BC1,B类),E类有4份(最多),占40%;⑵在123份材料中,超过ROC22(CK1)有37份,占30.1%,超过粤糖93-159(CK2)有71份,占57.7%,有52份材料未超过双对照。在超过对照ROC22的37份材料中,F3代(E类)占相应同类材料的比例最大,为45.5%,其次是对等F1-BC2(C类)、对等F1-BC1(B类)、对等F2-BC1(D类),对等F2代材料(A类)最小,为21.4%。在56份对等F2材料(A类)中,野生血缘F1代超过对照ROC22的比例达到50%;⑶从各类材料相对接近度Cg的平均值来看,A类(对等F2代)B类(对等F1-BC1代)>D类(对等F2-BC1代)>C类(对等F1-BC2)>CK(对照)>E类(F3代)。所以,传统高贵化杂交F3代(E类)整体上综合评价最好,按“对等杂交”方式利用甘蔗野生资源具有潜在的优势。

Integrated Evaluation of the YR15 Sugarcane Innovative Germplasm with Different Ways of Crossing by DTOPSIS

Ruili breeding station is working at structuring independent parental system which be conducted by hybridization within equal generation(HEG),through F1×F1 that crossing between cultivated original species or with wild sugarcanes to F2,F2×F2 to F3,and so on.The 123 clones of YR15 series was classified by 56 HEG F2(A),22 HEG F1-BC1(B),11 HEG F1-BC2(C),23 HEG F2-BC1(D)and 11 traditional“noble”F3(E).Their comprehensive evaluation based on plant height,diameter,stalk weight,stalk number,cane yield,brix(%)and sugar yield was conducted using DTOPSIS(Dynamic technique for order preference by similarity to ideal solution).The results indicated:(1)The 10 clones with top proximity(Cg)value were YR15-88(F1-BC1,B),YR15-150(F1-BC2,C),YR15-153(F3,E),YR15-158(F3,E),YR15-127(F1-BC1,B),YR15-155(F3,E),YR15-90(F2-BC1,D),YR15-29(F2,A),YR15-97(F3,E),YR15-134(F1-BC1,B),accounting for 40%;(2)There were 37 clones better than ROC22(CK1)and 71 clones better than YT93-159(CK2)in total 123 clones for Cg,accounting for 30.1%and 57.7%,respectively.In 37 clones surpassed ROC22(CK1),the highest ratio in all same type was F3(E),accounting for 45.5%,and followed by F1-BC2(C),F1-BC1(B)and F2-BC1(D),and the least was F2(A),accounting for 21.4%.In 56 HEG F2(A),the ratio that are better than ROC22(CK1)of F1 was 50%.(3)The average Cg value was in a order of A(F2)B>D>C>CK>E.Therefore,“noble”F3(E)was the best,and other HEG related clones have some breeding potentialities in using wild cane.