萝卜杂种优势效应分析及杂交组合的灰色评判

The Analysis on Turnip Hybrid Effect of Preponderance and Judgement on Turnip Crosses by Gray Systematic Theory

对萝卜 15个组合的杂种优势效应分析的结果表明 :除里外青×旱红表现为负向优势外 ,其余各组合均表现为正向优势。多数组合优势效应比较明显 ,有 14个组合的超均亲优势大于 2 8% ,10个组合的超高亲优势大于 2 0 % ,其中最明显的是旱红×四季红 3号、大红袍×甜脆青和四季红 3号×甜脆青。用灰色评判法对 15个杂交组合分析的结果表明 :组合3(大红袍×满堂红 )、12 (旱红×四季红 3号 )的灰色综合评判值 >0 .70 0 0 ,为优良 (一级 )组合 ;组合 1、4、6、7、9、11、13的灰色评判值介于 0 .6 0 0 0～ 0 .70 0 0 0之间 ,为良好 (二级 )组合 ;组合 2、5、8、10、14、15的灰色评判值 <0 .6 0 0 0 ,为一般 (三级 )组合。综合结果分析 :旱红×四季红 3号为最有价值的组合。

The analysis on 15 turnip hybrid-cross preponderance has been carried out .The results showed that all cross take on positive preponderance except liwaiqin×hanhong and most of crosses have obvious preponderance, there are 14 crosses' preponderance which surpass the average-parents >28%, and 10 crosses' preponderance which surpass the higher-parents> 20%, in which the most obvious crosses are hanhong×sijihong 3#, dahongpao×tianchuiqin and sijihong 3#×tianchuiqin. The analysis on 15 turnip hybrid-crosses' order and degree has been carried out by judgement of gray system. The results showed that the values of gray synthetical judgement of cross 3 (dahongpao×mantanghong) and cross 12 (hanhong×sijihong3# ) >0.7000, the two crosses are excellent (first degree)crosses; the values of gray synthetical judgement of crosses (1,4,6,7,9,11,13) are between 0.6000～0.7000, these crosses belong to good (the second degree)crosses; while the values of crosses (2,5,8,10,14,15) <0.6000, they are belong to ordinary (the third degree)crosses. The synthetical results showed that hanhong×sijihong3# is the most value cross.