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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Alternate S1 and Diallel Cross Selection for High Yield and High Combining Ability Maize (Zea mays L.) Inbred) ผู้เขียน: Chitra BAHADUR KUNWAR,  ดร.กฤษฎา สัมพันธารักษ์, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractFive S2 maize families and 5 plants per family were derived from Agronomy Department, Kasetsart University program. They were selected by two cycles of S1 selection in R-49 grouped replicated honeycomb (HC) design with equilateral triangle of side 0.866 m and 40 replications. The 25 S2 plants were designated as line number 1 to 25. Selection was continued by bulk family pedigree method until S4 lines were obtained. Simultaneously, remnant S2 seeds were diallel crossed within each family set and the top intra-family hybrid (F1 C0) of each set was self pollinated to obtain S1s which subsequently diallel crossed to obtain intra-family hybrids of cycle-1 (F1C1). However, only S1s of the top F1 C0 of the first top 3 family sets were used. Moreover, the top F1 C0 of each set were diallel crossed and testcrossed to their corresponding S4 sister lines to obtain inter family and intra-family testcross hybrids, respectively. All types of hybrids and S4 lines were evaluated for their yielding ability and combining ability at the National Corn and Sorghum Research Center, Thailand. Intra-family hybrids of the cycle-0 and cycle-1 were at par with the common check for grain yield. However, the yield of one intra-family testcross hybrid of the second set of cycle-0 was significantly higher than that of the common check, while two inter-family hybrids of cycle-0 were relatively high yield but not significant from the single cross, Agron2029. Yield of most S4 lines from pedigree selection were relatively high and could be used for commercial seed production. The methods fitted to the additive gene effect model and effectively identified high yielding early generation hybrids which could be used as source of either recycled single cross hybrids or modified double cross hybrids. It is expected that this research will provide a guide line for appropriate selection intensities for inbred line development in maize. The method is the alternate S1-diallel cross selection for high yield and high combining ability inbreds in highly selected materials for the production of hybrids which adapt to wide ranges of plant densities |
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 ผลงานตีพิมพ์ในวารสารวิชาการEvaluation of Yield Potential and Combining Ability in Thai Elite Cassava Varieties for Breeding Selectionผู้แต่ง:นายพงษ์พิทักษ์ ยวนจิต, Dr.Supachai Vuttipongchaikij, Associate Professor , Dr.Passorn Wonnapinij, Assistant Professor , Hernan Ceballos, Dr.Ekaphan Kraichak, Associate Professor , Dr.Choosak Jompuk, Associate Professor , Dr.Piya Kittipadakul, Assistant Professor , วารสาร: 
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Genetic Analysis of some Important Seed Yield Related Traits in Kenaf (Hibiscus cannabinus L.)) ผู้เขียน:Md. Golam Mostofa, Lutfur Rahman, Ranjit Kumar Ghosh สื่อสิ่งพิมพ์:pdf AbstractGenetic analyses for the days to first flowering, the number of fruits per plant, the number of seeds per fruit and the 1,000 seed-weight were carried out using six-parents half diallel crosses in kenaf to determine the inheritance pattern and genetic behavior of these characters. Hayman’s analysis of variance and components of variations related to gene actions indicated the involvement of both additive and dominance effects for all the traits, but the value of additive (D) and dominance (H1) of (H1/D)? indicated predominant additive effects for the days to first flowering (0.91) and 1,000 seed-weight (0.81), while there were dominance effects for the number of fruits per plant (28.35) and the number of seeds per fruit (2.58). Variance and covariance graphs revealed a partial dominance for all the traits except the number of seeds per fruit which showed over-dominance. Parents Acc.5030, Acc.4197 and Acc.2922 possessed the most recessive genes, while parents Acc.4659 and Acc.2731 had maximum dominant alleles for all the studied traits. The value of heritability in the narrow sense (h2 ns) was comparatively high for the days to first flowering (0.59) and 1,000 seed-weight (0.56), but it was low for the number of seeds per fruit (0.09) and the number of fruits per plant (0.01). Therefore, the improvement of seed yield can be enhanced through pedigree selection considering the desired traits in the early or segregating generation based on appropriate parents in the breeding program. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Heterosis and Combining Ability for Yield and Yield Components
of Cotton (Gossypium hirsutum L.)) ผู้เขียน:Zerihun Desalegn, ดร.งามชื่น รัตนดิลก, รองศาสตราจารย์ , ดร.รังสฤษดิ์ กาวีต๊ะ, รองศาสตราจารย์ , นายประดิษฐ์ พงศ์ทองคำ, ศาสตราจารย์เกียรติคุณ, Ananchai Kuantham สื่อสิ่งพิมพ์:pdf AbstractHeterosis and combining ability for yield and yield components were determined in a population
derived from half diallel crossing of six cotton genotypes. Heterosis and heterobeltiosis occurred in
varying degrees. The highest heterosis for lint yield was 66.4 % and for seedcotton yield was 46.3 %. Five
of fifteen crosses showed significant heterobeltiosis for seedcotton yield. Significant heterobeltiosis was
predicted for crosses of GL-7 X Cucurova1518 and Del Cerro X Cucurova1518 for seedcotton yield,
which resulted in 19.5 and 19.0 %, respectively. The analysis of variance to compare between parents
and F1 crosses showed that the mean squares of genotypes and general combining ability (GCA) were
significant (P<0.01) for all traits studied. However, the mean square of specific combining ability (SCA)
was significant only for lint percentage and seed index. The magnitude of GCA was higher than SCA in
all cases, indicating that additive gene action was more important than non-additive in the inheritance of
the traits. In this study, Cucurova 1518 and GL-7 were good combiners for yield and yield components.
The two best crosses for seedcotton yield were GL-7 X Cucurova1518 and Del Cerro X Cucurova1518.
Best parents and best crosses could be used to develop high yield breeding materials. |
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Researcherดร. ศุภชัย วุฒิพงศ์ชัยกิจ, รองศาสตราจารย์ที่ทำงาน:ภาควิชาพันธุศาสตร์ คณะวิทยาศาสตร์ สาขาที่สนใจ:Plant molecular biology, Plant cell wall, genetic engineering, protein expression, polysaccharide, Biomass, Genome editing, CRISPR/Cas Resume |
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Researcherดร. ปิยะ กิตติภาดากุล, ผู้ช่วยศาสตราจารย์ที่ทำงาน:ภาควิชาพืชไร่นา คณะเกษตร สาขาที่สนใจ:การปรับปรุงพันธุ์พืช (Plant Breeding), การประยุกต์ใช้เทคโนโลยีชีวภาพในการปรับปรุงพันธุ์ พันธุศาสตร์ปริมาณ, Quantitative Genetics and Molecular Approaches in Plant Breeding, การใช้สถิติขั้นสูงในงานวิจัยเกษตร (Advance Statistics in Agriculture) , การจัดการและการผลิตมันสำปะหลังและพืชพลังงาน (Crop Management and Production) Resume |