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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Mutant Mungbean Lines from Radiation and Chemical Induction) ผู้เขียน: นางอรุณี วงศ์ปิยะสถิตย์, ศาสตราจารย์ ,  Somsong Chotechuen, ดร.ประภารัจ หอมจันทน์, ศาสตราจารย์ , Sumana Ngampongsai, นางสิรนุช ลามศรีจันทร์, ศาสตราจารย์, Somyot Pichitporn สื่อสิ่งพิมพ์:pdf AbstractGamma rays of 500 Gy and the chemical mutagen, 1% ethylmethane sulphonate (EMS) were administered to induce mutation in mungbean KPS 1 and CN 36 varieties for improvement of disease resistance to cercospora leaf spot and powdery mildew as well as producing high yields. The individual plant and plant-row selections were made in M2 and M3 and in M3 and M4 of KPS 1 and CN 36 respectively. The selected characters observed were the low level of powdery mildew, pods protruding up above the canopy, early maturity, and purple-red petioles. Preliminary yield test of 27 selected lines comparing to original varieties, KPS 1 and CN 36, revealed potentiality of some lines that might be developed into good varieties. These were, M5-8 with good pod setting, M5-19 with pods protruding up above the canopy, M5-21 and M5-22 with good plant type and high pod setting, and M5-24 with early flowering. All five mutant lines possessed moderate resistance to powdery mildew as did KPS 1, while CN 36 moderate susceptibility. The controls as well as the selected lines were also moderately resistant to cercospora leaf spot. For further investigation, artificial inoculation of the pathogens in severe infection would be made in yield test so that only most resistant lines could be chosen. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Induced Mutations in Mungbean Breeding : Regional Yield Trial of Mungbean Mutant Lines) ผู้เขียน:นางอรุณี วงศ์ปิยะสถิตย์, ศาสตราจารย์, Somsong Chotechuen, ดร.ประภารัจ หอมจันทน์, ศาสตราจารย์, Sumana Ngampongsai, Wilaiwan Promcham สื่อสิ่งพิมพ์:pdf AbstractComparison of mungbean mutant lines with the standard varieties was conducted at various stations during 1998 and 1999, RCB was employed with 4 replications. In the year 1998, 12 selected mutant lines were planted in 10 experimental plots at 7 locations and the three lines of M5-5, M5-1 and M4-2 were found to give the high yields of 243, 235 and 229 kg/rai, respectively, comparing to 213 and 228 kg/rai of KPS1 and CN36, respectively. During 1999, 12 mutant lines were planted in 6 plots at 5 locations and it was found that M5-10, M4-2, M5-5 and M5-22 gave yields of 240, 240, 236 and 232 kg/rai, respectively, while KPS1 and CN36 gave 227 and 232 kg/rai, respectively. Whereas the highest yield was obtained from M5-5 in 1998, it was M4-2 in 1999. The 2 year-tests resulted in the selection of M5-5, M5-1 and M4-2 for further comparing study with the standard varieties in the farmers’ fields. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Wind Velocity Over the Ground Surface of Hill-Evergreen Forest at Doi Pui, Chiengmai) ผู้เขียน:ดร.เกษม จันทร์แก้ว, ศาสตราจารย์เกียรติคุณ, นายชุมพล งามผ่องใส สื่อสิ่งพิมพ์:pdf AbstractThre-cup anemometer was used to measure wide speed at 24 inches above ground surface of hill-evergreen forest at Kong- Ma Watershed Research Station; Doi Pui Chiengmai, elevation 1350 meters from mean sea level. The wind speed was found averaging annually 13.8 kilometers pre hour, with the range of monthly values of 9.1 to 18.2 kilometers pre hour. Starnd heights surrounding the climatic station influenced the wide speed especially in winter as well as wet season. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Feeding Preferences and Reproduction of the False Powder Post Beetle, Sinoxylon anale Lesne, on Two Clones of the Par? Rubber Tree) ผู้เขียน:Wisut Sittichaya, Aran Ngampongsai, Surakrai Permkam, บัวผัน พวงศิลป์ สื่อสิ่งพิมพ์:pdf AbstractThe feeding preference and reproduction of Sinoxylon anale on two rubberwood clones (PB235, RRIM600 and the main branch of clone RRIM600) were investigated. No-choice and multiple-choice feeding tests were designed to determine the feeding preference of the beetle, whereas laboratory reared beetles were used for reproductivity measurements. Adult S. anale preferred rubberwood clone PB235 over both types of wood from clone RRIM600. In a multiple choice test, 60% of the beetles chose rubberwood clone PB235, and of the remainder, 24% and 16% chose wood from the trunk and branch of clone RRIM 600, respectively. The adult beetles also showed a highly significant (P < 0.001) preference for feeding on wood from clone PB235 (0.295 ? 0.028 g) over trunk wood from clone RRIM 600 (0.253 ? 0.029 g) but there was no significant difference in the preference shown for wood from the RRIM600 branch (0.275 ? 0.021g). S. anale also produced the greatest number of progeny in clone PB235 (39.07 ? 17.30 individuals), significantly greater (P < 0.01) than the number produced in the trunk wood (25.73 ? 8.41 individuals) and the branch wood (22.47 ? 2.73 individuals) from the RRIM600 clones. The results indicated that S. anale seemed to prefer (as well as being more reproductive in) wood with a higher starch content. |
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