Search Result of "Drought tolerant"

About 41 results
Img
Img
Img
Img
Img
Img

งานวิจัย

Measuring the Impact of Rockefeller foundation’s Funding for the Development of Drought tolerant Rice in Thailand (2008)

หัวหน้าโครงการ:Imgดร.อรชส นภสินธุวงศ์, ผู้ช่วยศาสตราจารย์

ผู้ร่วมโครงการ:Imgนายสมพร อิศวิลานนท์, รองศาสตราจารย์

แหล่งทุน:Rutgers University

ผลลัพธ์:วารสาร (3) ประชุมวิชาการ (1)

Img
Img
Img
Img
Img
Img
Img
Img

ผลงานตีพิมพ์ในวารสารวิชาการ

Adoption of Drought-tolerant Rice in Thailand: Participatory Varietal Selection and Implications for Breeding Programs

ผู้แต่ง:ImgDr.Orachos Napasintuwong, Assistant Professor, ImgCarl Pray,

วารสาร:

Img
Img

การประชุมวิชาการ

Induction of Water Stress with Polyethylene Glycol under Hydroponic System for Drought-tolerant Screening in Sunflower Seedlings

ผู้แต่ง:

การประชุมวิชาการ:

Img
Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Differential Responses of Selected Soybean Cultivars to Drought Stress and Their Drought Tolerant Attributions)

ผู้เขียน:ImgAung Moe Myo Tint, Imgดร.เอ็จ สโรบล, รองศาสตราจารย์, ImgSutkhet Nakasathein, ImgWitith Chai-aree

สื่อสิ่งพิมพ์:pdf

Abstract

Seven soybean cultivars in Thailand were evaluated under well-watered and drought- stressed regimes. A randomized complete block design with three replications in greenhouses was used. Control pots were kept well watered. Imposing drought stress commenced at the vegetative growth stage 3 (V3) for 15 d and then pots were re-watered. Shoot dry matter (SDM), root dry matter (RDM), nodule dry matter (NDM), shoot tissue moisture content (STM%) and electrolyte leakage from leaf tissue (EL%) of each tested cultivar under both water regimes were investigated. Physiological responses of the cultivars and their relationship were identified. Their drought tolerances were examined using a stress susceptibility index (SSI), mean productivity (MP), geometric mean productivity (GMP), stress tolerance (TOL) and a stress tolerance index (STI). SDM, RDM and NDM decreased with increasing water stress. SDM, NDM, STM%, and EL% showed significant correlations with seed yield. On the basis of the physiological responses and drought tolerance attributes of the cultivars studied, SJ-4 was the most drought tolerant cultivar indicating that SJ-4 is not only the appropriate genotype for cultivar improvement but also for cultivation in drought-prone areas. STI had a highly significant correlation with seed yield (r=0.66) and could distinguish better yielding genotypes under the drought-stress environment. The results also showed that STI was the most appropriate index to attain better yielding cultivars for a drought-stress environment, followed by GMP.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 045, Issue 4, Jul 11 - Aug 11, Page 571 - 582 |  PDF |  Page 

Img
Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Drought Tolerant Quantitative Trait Loci on Flowering Traits, Panicle Exsertion Rate, Spikelet Sterility and Grain Yield of Rice under Rainfed Lowland Conditions)

ผู้เขียน:ImgRathmuny Then, ImgJonaliza L. SIANGLIW, Imgดร.อภิชาติ วรรณวิจิตร, รองศาสตราจารย์, Imgดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, ImgShu Fukai, Imgธีรยุทธ ตู้จินดา*

สื่อสิ่งพิมพ์:pdf

Abstract

Drought hinders rice production and yield stability in rainfed lowland ecosystems. Quantitative trait loci (QTL) for root traits on chromosomes 1, 2, 7 and 9 in backcross introgression lines (BIL) of elite rice variety IR64, derived from Azucena/IR64, were designated as Targets 1, 2, 7 and 9 in the present study. Severe stress developed during the period of optimum flowering as indicated by 98-100% yield reduction. Significant phenotypic variations in BIL were observed on days to flowering (DF), delay in flowering (DeF), panicle exsertion rate (PEX), percent spikelet sterility (PSS) and grain yield (GY). Variations among target QTL were also found in the traits studied, particularly under drought stress, indicating that BIL containing Targets 1 and 2 had early DF, higher PEX, lower PSS and higher GY under stress than those with Targets 7 and 9. Targets 7 and 9 lacked QTL for root thickness, indicating that it plays a role in drought tolerance under rainfed lowland conditions. Early flowering BIL had an advantage over later flowering ones because water can be extracted at the early drought stage, which can support the PEX and result in low PSS. In a very severe drought at the flowering stage, PSS directly affected GY. Further study of root morphology and early flowering under stress are necessary to improve rice yields under rainfed lowland conditions.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 045, Issue 1, Jan 11 - Feb 11, Page 101 - 109 |  PDF |  Page 

123