Search Result of "P. Laosuwan"

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ผลงานตีพิมพ์ในวารสารวิชาการ

Potential Lines and Hybrids Developed from Modified Reciprocal Recurrent Selection in Maize

ผู้แต่ง:ImgDr.Sujin Jenweerawat, Assistant Professor, ImgDr.Chokechai Aekatasanawan, ImgPaisan Laosuwan, ImgArnel R. Hallauer,

วารสาร:

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การประชุมวิชาการ

Potential lines and hybrids developed from modified reciprocal recurrent selection in maize

ผู้แต่ง:ImgDr.Chokechai Aekatasanawan, ImgSujin Jenweerawat, ImgPaisan Laosuwan, ImgArnel R. Hallauer,

การประชุมวิชาการ:

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Potential Lines and Hybrids Developed from Modified Reciprocal Recurrent Selection in Maize)

ผู้เขียน:Imgดร.สุจินต์ เจนวีรวัฒน์, ผู้ช่วยศาสตราจารย์, Imgดร.โชคชัย เอกทัศนาวรรณ, ImgPaisan Laosuwan, ImgArnel R. Hallauer

สื่อสิ่งพิมพ์:pdf

Abstract

A single-cross hybrid is the ultimate commercial product from maize breeding programs. Modified reciprocal recurrent selection (MRRS) is an alternative selection method for inbred and hybrid development. The objectives of this study were to assess lines and hybrids developed from MRRS in Suwan1(S)C11 and KS6(S)C3 maize populations with inbred testers Ki 47 and Ki 46, respectively. Twenty-five S4 lines, which corresponded to the 25 top-yielding testcrosses from 250 S1 testcrosses with inbred tester in each C0 population, were used to produce 50 testcross hybrids with their inbred tester. Ten S4 lines, which corresponded to the 10 top-yielding testcrosses, were also used in a factorial cross to make 100 interpopulation hybrids. The 150 hybrids and their 50 S5 lines were evaluated separately at two locations. The results indicated that the 10 top-yielding hybrids were five from Suwan1(S)C11- S4 ? Ki 47, two from KS6(S)C3-S4 ? Ki 46 and three from interpopulation hybrids with significantly higher (P < 0.05) grain yield than the hybrid check, Suwan 3851, by two, one and two hybrids, respectively. In addition, three hybrids from Suwan1(S)C11-S4 ? Ki 47 had highly significant (P < 0.01) grain yield. The top 10 hybrids had similar values to the check for average days to 50% anthesis and silking, root and stalk lodging, foliar diseases and grain shelling, but had higher plant and ear heights. Parental lines of the top 10 hybrids were seven lines from Suwan1(S)C11 and four lines from KS6(S)C3. Their S5 lines, which had yields as high as the inbred check Ki 47, were five and three lines, respectively. In addition, the lines were not different from the check in other agronomic traits, except for days to flowering and plant height. In conclusion, the MRRS program was effective for the development of potential lines and hybrids for further commercial hybrid production.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 044, Issue 4, Jul 10 - Aug 10, Page 517 - 522 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Regional and Seasonal Effects on Phenology of Mungbean ( Vigna radiate ( L.) Wilczek ) and Black Gram ( Vigna radiate ( L.) Hepper ) in Thailand)

ผู้เขียน:ImgA.Pookpakdi, ImgA. Chinchest, ImgS. Laoh siriwong, ImgP. Laosuwan, ImgT. Maolanont, ImgR.J. Lawe, ImgB.C. Imrie

สื่อสิ่งพิมพ์:pdf

Abstract

Knowledge of how the environment affects the development and growth of a crop, and how different genotypes respond to particular environmental factors, is a prerequisite to directed plant improvement. This paper is a progress report on a collaborative study being conducted within Thailand to examine the regional and seasonal components of environmental effects on growth and development of fourteen mungbean ( Vigna radiate ( L .) Wilczek ) and six black gram ( Vigna radiate ( L .) Hepper ) genotypes. In the study, sowings of all genotypes were made at monthly intervals in five locations distributed throughut Thailand : Phitsanulok, Khon Kaen, Chainat, Kamphaengsean and Hat Yai. Plantings commenced in mid-1986 and ended in mid-1987. Phenological data from the first six months of the study are presented and discussed in terms of two key climatic factors affecting plant growth and development, daylength and temperature. Averaged over genotypes, effects of location and sowing date were large. In general, flowering occurred earlier at more southern locations and, as swoing was delayed from May to September. However there were also significant genotype interactions with planting locations and sowing dates. In general, the phonological responses observed within both mungbean and black gram were consistent with either daylength insensitivity or quantitative short-day photoperiodic response.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 022, Issue 1, Jan 88 - Mar 88, Page 45 - 55 |  PDF |  Page 

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Researcher

ดร. โชคชัย เอกทัศนาวรรณ

ที่ทำงาน:ศูนย์วิจัยข้าวโพดและข้าวฟ่างแห่งชาติ คณะเกษตร บางเขน

สาขาที่สนใจ:การปรับปรุงพันธุ์ข้าวโพด

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Researcher

ดร. สุจินต์ เจนวีรวัฒน์, ผู้ช่วยศาสตราจารย์

ที่ทำงาน:ภาควิชาพืชไร่นา คณะเกษตร บางเขน

สาขาที่สนใจ:การปรับปรุงพันธุ์ข้าวโพด, การปรับปรุงพันธุ์ยางพารา, การปรับปรุงพันธุ์งา

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