Search Result of "ดวงใจ สุริยาอรุณโรจน์"

About 3 results
Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Screening and Selection for Physiological Characters Contributing to Salinity Tolerance in Rice)

ผู้เขียน:Imgดวงใจ สุริยาอรุณโรจน์, ImgNopporn Supapoj, Imgดร.อภิชาติ วรรณวิจิตร, รองศาสตราจารย์, Imgธีรยุทธ ตู้จินดา*

สื่อสิ่งพิมพ์:pdf

Abstract

Two screening techniques, one initial screening using nutrient solution culture at young seedling stage and the other using soil in pots at vegetative stage, were used for identification of genotypes for salinity tolerance. Sixteen rice lines and cultivars were screened initially at seedling stage. Germinated seeds were placed on styrofoam plates floated on nutrient solution in a plastic container. After 14 days of sowing, the seedlings were subjected to salinization. The results showed that there were 3 groups of rice with different levels of response to salinity ; tolerant group consisted of Pokkali, FL496 and FL530, moderately tolerant group consisted of FL358, FL367, FL411, FL416, FL434, FL443, FL478, FL523, FL563, KMK and DDG, and susceptible group were KDML105 and RD6. To confirm the reliability of this initial screening technique, the visual salt-injury symptom was compared with the mean performance of salinity damage rating, Na+, K+ content and Na+/K+ absorption ratio in young leaves , old leaves and stem to identify physiological characters contributing to salinity tolerance in rice in the vegetative experiment. Eight lines/cultivars of rice were selected from the seedling screening to further investigate tolerant ability at vegetative stage in soil medium. In this test, 21 day-old seedling were subjected to 3 levels of salinity, 4,8 and 12 dS /m. The results showed visual scores to match with the Na+/K+ ratio, the cultivars with low Na+/K+ ratio had high tolerant ability and the susceptible one had high Na+/K+ ratio. The two selected salt tolerant recombinant inbred lines were FL496 and FL478 and two landrace cultivars selected were DDG and KMK which will be used as donors to introgress salt tolerant QTL into target cultivars (KDML105 and RD6) in salt tolerance breeding program.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 039, Issue 2, Apr 05 - Jun 05, Page 174 - 185 |  PDF |  Page 

Img

ที่มา:วิทยานิพนธ์ ปริญญาเอก (จาก: บัณฑิตวิทยาลัย มก. และสำนักหอสมุด มก.)

หัวเรื่อง:Molecular Breeding for Salt Tolerance : Introgression Salt Tolerant QTL Confering Na+/K+ ratio in Thai Hom Mali Rice

ผู้เขียน:Imgดวงใจ สุริยาอรุณโรจน์

ประธานกรรมการ:Imgดร.อภิชาติ วรรณวิจิตร, รองศาสตราจารย์

กรรมการวิชาเอก:Imgนายสมวงษ์ ตระกูลรุ่ง, Imgนางสาวสุกัญญา กล้าขยัน

กรรมการวิชารอง:Imgธีรยุทธ ตู้จินดา*

สื่อสิ่งพิมพ์:pdf

Abstract


Dissertation/Thesis Info
Abstract  (cache) |  Full text  (cache)  | Page  (Info)

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Identification of Nutrients Limiting Rice Seedling Growth in Soils of Northeast Thailand under Water-Limiting and Non-Limiting Conditions)

ผู้เขียน:Imgดวงใจ สุริยาอรุณโรจน์, ImgPrasert Chaiyawat, ImgShu Fukai, ImgPax Blamey

สื่อสิ่งพิมพ์:pdf

Abstract

Glasshouse nutrient omission trials are useful in identifying nutrient limitations for plant growth in a number of soils under the same environmental conditions. Soils of low fertility are commonly used for production of rainfed lowland rice (Oryza sativa L.), and the crop often encounters water stress. Nutrient requirements may be modified when standing water disappears from the field. Two experiments with rice seedlings were conducted in a glasshouse at Ubon Rice Research Center, Thailand, to identify the nutrients which limit rice growth in soils of Northeast Thailand, and to determine whether nutrient limitations are affected by water availability. In Experiment 1, rice was grown on two soils (Roi Et and Ubon series) under well-watered and water-limiting conditions, and 15 nutrient treatments were imposed. In Experiment 2, six soils from Northeast Thailand were examined using the same 15 nutrient treatments. The nutrients which clearly limited the growth of rice plants in soils of Northeast Thailand were nitrogen (N) and phosphorus (P). In some cases, potassium (K) and sulfur (S) also limited growth, and in one soil zinc (Zn) and boron (B) also limited growth. A shortage of N was the most important limitation for plant growth in all soils except one in which P was more important. The low supply of P decreased plant height and leaf area development during early growth; low N supply had a greater effect later during growth. The omission of P had a larger detrimental effect on growth when water supply was limited. In the Roi Et soil, the omission of S had a large effect on leaf area and total dry matter production only under water stress conditions, but this was not found in the other soils examined. These results from glasshouse studies showed that the nutrients limiting rice growth depend on soil type and water availability in soils of Northeast Thailand.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 034, Issue 3, Jul 00 - Sep 00, Page 323 - 331 |  PDF |  Page