tory burch outlet Major Characters in several maiz

43nike9485qt

Several maize inbred lines combining ability of major quantitative trait

Genetic effects, and the remaining 5 traits additive and non additive gene effects exist. S513 Cong Qing gentry in the trial around Key words:. 0I ... _d A, L I seem to have one: 』. Hybrid maize breeding is the genetic basis of high and low yield of hybrid is the specific combining ability of inbred line performance of the parents the right choice. Confirmed breeding work fine combination is the key to success. Therefore, parents with high combining ability in maize breeding and identification of important breeding work. l Materials and methods used in this experiment, high-material-based generation of inbred lines of the 1996 5 and stable system. By (Pl × P2) is (2 × 3) design, female inbred lines 6820,6078; male inbred lines 6815,6808 and 681o. Preparation of six crosses. 1997 within the test area of the plant, randomized block design, 3 repeats. Single practice, President 3m, spacing O. 65m, spacing O. 30m. Asked each district in the determination of five selected plant height, ear, bald, ear length, ear diameter, row number, kernel number per row, shaft diameter, ear weight, kernel weight, the seed rate and yield traits l2 , introduced by Liu Lai-fu and other methods of combining ability analysis. 2 Results and analysis 2.1 combined with the ability of the characters and the analysis of variance ANOVA l2 traits, the results of ear length than the rate of kernel weight and kernel combination of Q was not significant, the other 9 traits portfolio asked the difference between were significant or very significant. 5 inbred lines that the 9 traits portfolio asked there is a real difference. 9 of these traits were further combining ability analysis showed that P. In addition to general combining ability, plant height, kernels per row were not significantly different traits outside the remaining 7 were significant or very significant; the general combining ability of ear, ear diameter, row number and panicle weight 4 traits did not reach significant levels . Only specific combining ability, plant height, ear, ear diameter, rows 5 traits and yield per plant reached a significant or very significant difference, and the remaining 4 traits were significant levels of late. Analysis of variance results (Table 1). Table l {F value of analysis of variance) technology listless Date: 1998 Ol basked in a Maize 4l 7, 1999 No. 1 with Taiwan, the general power of 2.2 GCA controlled by additive genes, so the general combining ability inbred lines with high transmission of its strong characters, a great impact on future generations, collapsed while the estimate of each trait value of general combining ability, the results (Table 2). 'Table 2 sets the general force with effect values from Table 2, the same trait between different parents GCA very different, the same parent are quite different for different traits. Understanding of parental performance for each trait with the ability to have the purpose of general combining ability of selected high and low and can complement each other's parents hybridization, resulting in a hybrid of comprehensive quality traits of some significance. When grain weight per plant for the breeding objective, selection of grain weight per plant for the positive effect of better parental values, the test to emu 2o, 6815,6810 optimum performance of the three parents. Integrated 9 traits optimum performance of the GCA for the 6815 and 6810 parents of two inbred lines, and although the yield per plant of 20 emu high combining ability,[link widoczny dla zalogowanych], bald with a higher power, with the force of kernels per row is negative, such as use of the other parent should pay attention to complementary traits. Specific combining ability analysis of 23 specific combining ability is mainly produced by non-additive effect, is that the performance of hybrids and their parents on the basis of the average deviation of the expected results can be used to guide the breeding of hybrids, hybrids now 6 9 specific combining ability effect traits are listed in Table 3. Table 3,[link widoczny dla zalogowanych], the value of specific combining ability effect can be seen from Table 3, different combinations of the same character very different specific combining ability,[link widoczny dla zalogowanych], specific combining ability combined performance of future generations depends mainly on their parents, general combining ability. The yield per plant as an example, 6078 × 6815 combinations, although the highest specific combining ability, GCA 6078 but lower than the combined average yield per plant; contrast 6820 × 6810, although specific combining ability value of the combination of the middle, but single parents strains yield positive general combining ability for the high-value, the combination of the highest yield per plant. Therefore, parents should focus on parental choice GCA performance. Summary (1) plant height, ear, ear diameter, row number and yield of 5 characters is additive and non additive genes result of the role, and bald,[link widoczny dla zalogowanych], kernels per row, the major axis diameter and panicle weight by additive genetic effects. (2) general combining ability of different parents in the same trait are very different question. 9 from this study traits general combining ability, parental optimum performance for the 6815 and 6810. (3) general combining ability parents are a combination of selected high-quality combination of the possibility of large, matching crosses one of the parents to have a high general combining ability, and the other parent of the general combining ability or too low. 42 -
More articles related to topics：

polo outlet online e combination of hybrid rice K1

tory burch shoes Quality of Cut Gypsophila cultiva

tory burch outlet Summary of greenhouse vegetable