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ncycgdxhl
Wysłany: Pon 10:27, 24 Sty 2011
Temat postu: With excellent disease resistance alleles in tropi
With excellent disease resistance alleles in tropical and temperate maize populations identified
Leaf infected area (the average period of two years and all) Table 6. 5 kinds of diseases of significant and non-significant estimates and estimated net lp estimated net worth: an estimated net worth can be used to determine pay, or directly from F. Backcross inbred parents with the most effective. If the estimated net worth is negative and significant level, then you need to backcross, the loss may occur because the relative resistance loci (j; j or k) is less than the relative resistance to be possible sites (1
. If the value is not significant or significant positive value. Need in the self. For black spot, the majority of the estimated population of 45 the number of net positive and significant level, that I; greater than j; or k;. For rust, only estimates of a material as a significant level of net negative. For black spot, the results showed that the most useful material resistance l classes than i or k type allele negative allele. However, rust, most of the estimated net worth groups did not reach significant level, suggesting that beneficial alleles with class l loci with j or k class and the adverse alleles loci similar. Therefore,
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, both in terms of black spot and rust. Directly from the material �� inbred crosses can be obtained from the cross-resistance to enhance the new inbred lines. For the northern corn leaf blight and northern corn leaf blight small. Significant majority of the estimated net worth is negative, that the self backcross inbred lines right before the acquired resistance will increase the probability of increase of new inbred lines. For the Southern corn leaf blight, estimated net worth is negative and significant positive material and the material is basically the same. The same group with the B73 and Mo17 hybrid effect when using germplasm of tropical species and hybrids with improved adaptability of maize, the use of the corn belt germplasm will affect the corn belt germplasm �� exotic germplasm portfolio performance. In general, species with strong comprehensive background stalk (B73 type) germplasm of southern corn leaf blight, northern corn leaf blight and northern corn leaf blight resistance of a small weaker than the background of Lancaster (h1017 type) of the species quality. Lancaster firm stalk and comprehensive variety of quality both on the black spot disease sensitive. In the present study. Tropical germplasm �� Mo17 crosses the black spot, northern corn leaf blight, southern corn leaf blight and northern corn leaf blight disease of small class groups and lower than the same hybrid combination of B73, but with them or with the FR1064 LH185 hybrid irrelevant. B73 and Mo17 or hybrid group of l; estimates for the impact of different diseases with different Li. The material at l; value of the grading for the southern corn leaf, l;. 1O maximum value of a material for the group �� Mo17 hybrid combinations (Table 8 omitted). For the northern corn leaf blight and rust, 1O a l;. Value of 7 for the M017 material combinations. In contrast, the small spot disease in maize 10 l; maximum 7 material combinations for the B73. Therefore,
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, the choice to provide adaptive genes B73 or Mo17 population of tropical genetic resources as the classification of resistance genes have a greater impact. Hybrids of the strains (B73 or Mo17) the necessity of the backcross. For the northern corn leaf blight, all Mo17 hybrid groups have a significant negative net worth is estimated that the need for backcrossing, and all groups �� B73 hybrids are significant or not significant is the estimated value. For the Southern corn leaf blight, there have been similar pattern, all B73 hybrid combinations have a significant positive estimate the net, but not with bIol7 hybrid l7 populations has 7 significant negative estimated net worth, suggesting the need backcross. For the small northern corn leaf blight, and Mo17 hybrid groups of 17,
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, 12 has a significant negative net worth to the cylinder count,
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, and hybrid combinations with the B73 is not a significant negative estimate of the net. These results further emphasized in the evaluation of the genetic value of tropical,
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, with common strains of the importance for parents. Conclusion The Mo17 or B73 as a cross between parents and tropical groups to enhance the adaptability of hybrid combinations of inbred lines with good average performance, and other genetic material containing useful classification, cultivation of resistant strains of the value of backcrossing or selfing have a greater impact. These results show that: If you want to evaluate groups of tropical inbred lines in hybrid maize with resistance gene was used as resources. All tropical lines compared with the plow should be the same inbred lines cross. There are several studies in maize germplasm material optimization program can be used as many as 3-5 of the disease resistance of resources. Almost all materials are contained in FR1064 or LH185 exist in one or more of the beneficial allele disease. Excerpts from the flat CropSci. 4o (4): 948 ~ 954,2 Toru
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