| Flowering Chinese cabbage is easy bolting materials through long term choice, cultivation and domestication which we can use its young flower buds as food. As the increasing of consumer demand since from 1980s, planting range of flowering Chinese cabbage have been constantly expanding. Especially recent 20 years, more and more loved by people. Flowering Chinese cabbage originated in China’s Yangtze River Basin, and later cultivated to all parts of the country. Among that, Hubei, Hunan, Anhui, Zhejiang, Jiangsu and Jiangxi have a large cultivated area. Flowering Chinese cabbage is cross pollinated plant, having heterosis advantage. Different varieties have different performance in growth potential, harvest, disease resistance, adaptability, growth period and quality. Compared with a conventional, flowering Chinese cabbage miscellaneous parents complementary advantages, the advantages of different parents can be made in one, it will have some advantages in the quality, yield and exhibit. This study of flowering Chinese cabbage yield per plant, seed yield and agronomic traits of correlation and path analysis to find out the influence factors of yield related, and to our research group obtained 10 inbred plants with determination of force and system seed selecting, seed breeding and inbred line selection provides the basis, so as to lay the foundation for the breeding of new varieties of flowering Chinese cabbage. The results are as follows.1. Quantitative characters of flowering Chinese cabbage of the yield results and path analysis results. The test determined flowering Chinese cabbage 17 quantitative characters. Through reorganization and analysis,17 quantitative characters changed a lot. Coefficient of variation was more than 10%. Having option potential in breeding work. Main stem weight x13’ has the biggest coefficient of variation (82.29%). Main stem length x11(51.85%)is second. The third is grain weight per plant Y, which is 45.97%. Coefficient of variation of squaring stage is the least (11.64%). Furthermore, taking weight per plant Y as dependent variable, other 16 as independent variable. Through F test, testing the Linear regression relationship. The results should that the side stem weight, side stem width, main stem weight’s quantitative characters.F value have been significance level. The main stem length, secondary branch number, plant, flower crown’s quantitative characters.F value have been significance level. Each of them Having true linear regression with yield per plant Y. Through related analysis, getting the the relationship of each quantitative characters and related coefficient. The results should that the main stem length, secondary branch number, plant, flower crown’s quantitative characters having extreme significant correlation with yield per plant. The optimal multiple regression equations were obtained by the stepwise regression analysis:Y=-509.81+36.84X10+12.35X16+1.09X13. Through correlation analysis, stepwise regression analysis showed that The side stem weight per plant, stem number, main stem weight have he greatest impact on the yield per plant. Having direct effect on the composition of the plant yield. When selecting the target of high yield breeding, should based on the side stem weight per plant, stem number, main stem weight to get high production. We should pay attention to genotype of the main and side stem which is heavy, and the number of sprouts which is more. At the same time, to combination plant width, leaf number, plant height, stalk diameter, stalk length quantitative characters to having a comprehensive selection.2. The results constitute factors of seed yield per plant of flowering Chinese cabbage. Doing correlation analysis to 15 strains of flowering Chinese cabbage ’crystal white no.1.’’s 25 character value. The results showed that the seed yield per plant and two lateral branch number, flower number, pod number, seed number, Tertiary collateral flower number, pod number, seed number, whole plant flowers 10 traits of number, pod number, whole plant seed number was significantly correlated (r0.05=0.497, r0.01=0.623). It should that the relationship between the 10 characters and the seed yield was closely related. In order to take the seed yield per plant as the dependent variable Y, and the other 13 components as the independent variable, multiple stepwise regression analysis was carried out, and the optimal regression equation was obtained.:Y= 17.4086X23+0.0011X22+0.1589X21-0.1210X20-0.0115X15-0.1560X14+0.2199X13-10.8729X12-0.0117X11+0.0538X9+ 2.2335X8-0.1084X3+35.787. Correlation analysis, regression analysis and path analysis results show that secondary lateral branch number, flower number, seed number, tertiary collateral flower number, pod number, seed number, whole plant flower number, pod number, seed number, top seed branch number are significant or significant positive correlation. The direct effect of whole plant number and total plant number on seed yield per plant was the largest. By increasing the whole plant pod number, whole plant seed number, whole plant flowers number, secondary branch number, number of tertiary branches can improve the seed yield per plant.3. Analysis of the combining ability of main agronomic traits in flowering Chinese cabbage. A total of 90 combinations of 16 agronomic traits were investigated, and the variance of 16 characters was analyzed, and the significant difference was found between the 16 groups. Analysis of different parents to do the analysis showed that the effect of combining ability of different parents was different, the parents with good comprehensive traits were:P2, P8, P9, P10 4 parents. Different hybrid combinations showed great difference on the special combining ability effect value of different traits. In the process of breeding, different combinations of different combinations could be selected according to different target characters. As with the yield of flowering Chinese cabbage breeding goal is:combination of P2 x P9, P6 x P7, P5 × P10 in yield SCA showed a significantly positive effect, can be used to obtain high yield of the reference portfolio. In flowering cabbage cooked (bolting period) the breeding goal is:P1 × P6 and P1 × P10, P2 × P5, P2 × P6, P2 × P9, P3 × P5, P3 × P8, P3 × P9, P4 × P5, P4 × P7 and P6 × P7 P7 × P8, P8 × P10, P8 × P9 in budding stage (from sowing to bud length) SCA showed very significant positive effect can as maturing variety breeding of the reference portfolio. |
PDF Full Text Request