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 Wysłany: Pon 12:18, 14 Lut 2011 Temat postu: uggs bestellen Increase the use of single-gene res |
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Increase the use of single-gene resistance
Mountain Shidian, Longling around the roots of corn leaf blight race 1 genus, or at least to the 1st race was the dominant species of this small selection of resistant strains in the future there is a practical reference value. :. Lesion number: 1985 survey spike per plant clover (up and down the ear leaf and leaf), the number of new lesion group than in the original combination of units more than doubled. 1986 survey in the early stages, before tasseling stage, all the surviving leaves per plant, the new combination of lesions more than the original combination of 28, thirty days after the interval to the milk stage, due to lesion expansion,[link widoczny dla zalogowanych], some of the link combined lesion, two combinations less than the number of the original lesion. However, the number of new combination of lesions are still 11 more than the original mix, the new combination in the early stages, the number of disease classes more than the original combination, they often do not engender a new combination of disease-resistant than the original combination of illusion, in the demonstration and extension work, should be attention. 3. Lesion size; from the onset to the late start of the original composition than the average new combination of a single large spot size, and later as time goes on, this town is getting another big difference. In the I986 data side,[link widoczny dla zalogowanych], the early onset of a new combination of average spot area 1.1CIlq, and the original combination was 4.6cm; to post, the new combination of single-spot area of 5.7cm, the original combination is up to 45cm, compared with some big new combination seven times. This shows good resistance to new combination. 4. Lesion expansion rate: previous work has already pointed out, Ht gene on the growth of bacteria large lesion was strongly inhibited, and in the latent period (the performance of the lesion to produce spores) were prolonged sporulation decreased, which can reduce the chance again to dip, to control the epidemic purposes. The test also observed that the first dip after the process of lesion expansion, with Hl gene in plants than in plants without the gene Ht much slower. 1986 observation, the condition of the new group table index August 16 to September 15 of the thirty days, from 0.9 up to 2.7,[link widoczny dla zalogowanych], and the original combination of growth from 3 to 21, this is a new another manifestation of disease combined. To sum up, very small, relatively slow speed of expansion, disease refers to the low, milky mix of delicate than the original plant, which has a higher than the original combination of disease resistance. Second, the main economic traits in three points, according to two 4 on experimental data than the original combination of the new combination of plants and ear height were decreased slightly. Valley fever for no significant difference between early cultivation of maize, declined by only 5 cm plant height, ear down 1 cm. Medical high fertilizer cultivation in cool conditions, a decrease of 18 ~ 21 cm plant height,[link widoczny dla zalogowanych], ear drop 15 to 16 cm. In addition to plant height and ear obvious difference between these two characters, the ear traits not significantly different. 1985 new combination seems bald slightly larger, but the pilot test in 1986, there was no significant difference test. Third, the production of valley fever in 1986 for early corn planting, 1140 kg per mu, new combination, the original combination of 1138 kg per mu. Drums in 1986 in mountainous areas are warm season planting, in the absence of disease high fertilizer conditions, 1062 kg per mu, new combination, the original combination was 1100 pounds, the new combination of lower than the original combination of 3.5, less than significant level. In the same year, Baoshan more seed companies test results the organization is: popular in 1985. pilot a new combination of high fertilizer 1023 kg per mu, the original combination was 896 pounds, the new combined yield 14.2; in the trial on low fat, 685 kg per mu, new combination, the original combination was 596 pounds, the new portfolio yield 14.g%. To sum up: In the normal disease-free conditions, the new combination of production close to the original mix, the difference was not significant} but leaf blight epidemic, the new group table is a significant increase compared with the original combination . These results suggest that the combination of 2100 acres, most of the 1,000 pounds or more per mu,[link widoczny dla zalogowanych], the maximum 1394 pounds, some local people call it the area of about 2000 meters, planting density than situation, the provincial Academy of corn room is the Ht2, Ht The alternate use of a single gene can overcome these shortcomings. A
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