This experiment was conducted to investigate the changes of growth and maturity and to clarify the function of supernodulating characters, excessive nodules and high biological nitrogen fixation rate (BNF), on maturity in response to different planting time in supernodulating soybean mutants. Two su...
This experiment was conducted to investigate the changes of growth and maturity and to clarify the function of supernodulating characters, excessive nodules and high biological nitrogen fixation rate (BNF), on maturity in response to different planting time in supernodulating soybean mutants. Two supernodulating soybean mutants, Sakukei4 and SS2-2, and their parent cultivars, Enrei and Shinpaldalkong2, were planted on May 24 and June 15, 2004. The degrees of the shortening of growth days by the planting time delay were 18 to 22 days in four cultivar, and there were no significant differences among the cultivars. However, four cultivars showed the different maturity properties. Sakukei4, mutated from Enrei, showed later maturity than that of Enrei, and 882-2, mutated from Shinpaldalkong2, showed earlier maturity than that of Shinpaldalkong2. The plant and nodule dry weights at R6 stage of Sakukei4 showed the smallest decrement and those of SS2-2 was showed the largest decrement by the delay of planting time. The photosynthetic rates of Sakukei4 during the late reproductive growth period were slowly decreased, however those of SS2-2 were steeply decreased in two planting time treatments. Overall, the growth of Sakukei4 was decreased slowly, however the growth of SS2-2 was decreased sharply according to the delay of planting time. The percentage of seed yield of Sakukei4 in June planting plot compared with May planting plot at R8 stage was $92\%$, which was the lowest decreasing rate of yield among the cultivars, and in the case of SS2-2, it was in $76\%$, the highest one. These results indicated that the responses of supernodulating mutants by the delay of planting time were very similar to the wild types. This means supernodulating characters in supernodulating soybean mutants might not affect to the maturity property. Additionally, the maturity property could be considered as an important characteristics to decide or to select on the developments of supernodulating soybean mutants, which have a low productivity by an excessive nodules, especially.
This experiment was conducted to investigate the changes of growth and maturity and to clarify the function of supernodulating characters, excessive nodules and high biological nitrogen fixation rate (BNF), on maturity in response to different planting time in supernodulating soybean mutants. Two supernodulating soybean mutants, Sakukei4 and SS2-2, and their parent cultivars, Enrei and Shinpaldalkong2, were planted on May 24 and June 15, 2004. The degrees of the shortening of growth days by the planting time delay were 18 to 22 days in four cultivar, and there were no significant differences among the cultivars. However, four cultivars showed the different maturity properties. Sakukei4, mutated from Enrei, showed later maturity than that of Enrei, and 882-2, mutated from Shinpaldalkong2, showed earlier maturity than that of Shinpaldalkong2. The plant and nodule dry weights at R6 stage of Sakukei4 showed the smallest decrement and those of SS2-2 was showed the largest decrement by the delay of planting time. The photosynthetic rates of Sakukei4 during the late reproductive growth period were slowly decreased, however those of SS2-2 were steeply decreased in two planting time treatments. Overall, the growth of Sakukei4 was decreased slowly, however the growth of SS2-2 was decreased sharply according to the delay of planting time. The percentage of seed yield of Sakukei4 in June planting plot compared with May planting plot at R8 stage was $92\%$, which was the lowest decreasing rate of yield among the cultivars, and in the case of SS2-2, it was in $76\%$, the highest one. These results indicated that the responses of supernodulating mutants by the delay of planting time were very similar to the wild types. This means supernodulating characters in supernodulating soybean mutants might not affect to the maturity property. Additionally, the maturity property could be considered as an important characteristics to decide or to select on the developments of supernodulating soybean mutants, which have a low productivity by an excessive nodules, especially.
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제안 방법
The cotyledonal node was cutted and the lower part of cotyledonal node was regarded as underground part. To examine the growth char acteristics and dry weight, sample was separated into leaf, petiole, stem, pod, root, and nodules, and the each separated part was dried at 75℃ for 48 hours, Nodules activity was measured by nodule number and dry weight per plant. Pho tosynthesis and transpiration was measured by 5 plants per plot in the morning time at the light intensity about 2,000㎛ol/㎡/s on September 8 and 24 measuring LCA-4(ADC BioScientific Ltd.
대상 데이터
4(kg/10a) was incorporated in the soil before planting as basal dressing. Experimental design was split plot arrange ment which main plot was planting times and split plot was cultivars with three replications. Dunng the growth period, ten soybean plants per plot were sampled 2 times, one for pod set stage(R3) and the other for full seed stage(R6) stage samples.
This work was supported by postdoctoral fellowships course from Nation Institute of Crop Science, RDA. The author is grateful to staffs of National Institute of Crop Science of Japan, for their supply of soybean seeds, Sakukei4 and Enrei, and a professor Suk Ha, Lee of Seoul National University for their supply ofsoybean seeds, SS2-2.
This experiment was carried out at the field of National Institute of Crop Science in Suwon in 2004. Two supemodulating soybean mutants, Sakukei4 and SS2-2, and their parent cultivars, Enrei and Shinpaldalkong2 were used. Planting dates were May 24 and June 15 and the planting density was 60 x 15cm with 2 seeds per hole.
데이터처리
At the developmental stage of Full maturity(R8), soybean plants from 2m row length x 2 rows of each plot were harvested to determine seed yield and to analyze yield components. The collected data were analyzed using SAS package for ANOVA and GLM.
성능/효과
All the data of the growth and yield charactenstics by the planting time treatment in supemodulating mutants were shown consistent results that the growth of Sakukei4 was decreased slowly and that of SS2-2 was decreased sharply according to delay of planting time. These results indicated that the responses of supemodulating mutants by the delay of planting time were very similar to the wild types.
참고문헌 (12)
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