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 ที่มา:การประชุมวิชาการข้าวโพดและข้าวฟ่างแห่งชาติ ครั้งที่ 36หัวเรื่อง:การคัดเลือกข้าวฟ่างนิ้วมือเบื้องต้น |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Phenotypic Diversity of Ethiopian Finger Millet [Eleusine coracana (L.) Gaertn] in Relation to Geographical Regions as an Aid to Germplasm Collection and Conservation Strate ผู้เขียน: Kebere Bezaweletaw,  ดร.ประภา ศรีพิจิตต์, รองศาสตราจารย์ , ดร.วาสนา วงษ์ใหญ่, รองศาสตราจารย์ , ดร.วิภา หงษ์ตระกูล, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractSixty-four accessions (960 individuals) of landraces collected from five former regions of Ethiopia and Eritrea covering different agro-ecologies were characterized for growth habit, ear shape, grain shape, grain surface, grain color and pericarp persistence. The objective was to study the pattern and phenotypic diversity of some characters in finger millet. The experiment was laid down in a randomized complete block design (RCBD) with three replications. The percentage frequencies of the phenotypic classes of each character were calculated. The Shanon-Weaver diversity index (H’) was used to estimate the magnitude of diversity. One way analysis of variance of the non-normalized H using regions was under taken for individual characters. All the character considered showed marked differences in their distribution and variation. In no cases monomorphic classes were observed. Regional wise, Gojam and Welega revealed the highest diversity (H’=0.84) while Eritrea showed the lowest (H’=0.67). There was an increasing trend of diversity from north to south. Overall characters revealed intermediate to high diversity ranging from 0.60 for pericarp persistence to 0.99 for grain surface. Ear shape (P?0.01), grain shape (Pd?0.05) and grain surface (Pd?0.01) showed different levels of diversity among regions as opposed to growth habit, grain color and pericarp persistence whose variations were attributed to among accessions. The overall mean diversity estimate was high (H’=0.82). Generally, the result revealed the existence of a vast range of diversity in the indigenous finger millet germplasm. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Genetic Variation, Heritability and Path-Analysis in Ethiopian Finger Millet [Eleusine coracana (L.) Gaertn] Landraces) ผู้เขียน:Kebere Bezaweletaw, ดร.ประภา ศรีพิจิตต์, รองศาสตราจารย์, ดร.วาสนา วงษ์ใหญ่, รองศาสตราจารย์, ดร.วิภา หงษ์ตระกูล, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractA total of 66 finger millet accessions constituted of 64 landraces and two standard varieties were evaluated for 15 morpho-agronomic characters in randomized complete block design with three replications at Aresi-Negele Research Sub-Center in Ethiopia during 2004 main cropping season. The objectives were to assess the variability and association of characters. The mean squares of genotypes were highly significant for all characters. Relatively, grain yield per plant exhibiting the highest range (4.87-21.21g) and days to maturity showed the lowest range (143-200 days) of 336 and 40% where maximal values were greater than the corresponding minimal values, respectively. For all characters, the phenotypic and genotypic coefficients of variations varied in the orders of 8.05-31.23% and 6.52- 24.21% in both cases for days to maturity and grain yield per plant, respectively. Heritability estimates ranged from 20% for grain-filling duration to 84% for days to heading. Values of expected genetic advance varied from 6.67-44.14% for grain-filling duration and finger width, respectively. Finger width and length exhibited high heritability coupled with high genetic advance. The strongest positive association was observed between culm thickness and leaf blade width while the strongest negative association was found between 1,000-grain weight and finger number. Grain yield per plant associated positively with productive tillers, 1,000-grain weight, the number of grains per spikelet and finger number and negatively associated with days to heading and maturity. The genotypic correlation and path-coefficient analysis showed 1,000-grain weight, finger number and productive tillers as a major contributor to grain yield per plant. Generally, the result revealed the existence of variability for the characters studied in finger millet landraces. Hence, this is a potential character of interest which could be used in the genetic improvement of finger millet through hybridization and/or selection. |
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ที่มา:วิทยาสารกำแพงแสน (Kamphaengsaen Academic Journal) สาขาวิศวกรรมศาสตร์หัวเรื่อง:การจัดกล่มทางพันธุกรรมและการวิเคราะห์ความแปรปรวนขององค์ประกอบสำคัญของลักษณะทางสัณฐานวิทยาและเกษตรของเอธิโอเปียและเอริ
เทรีย |
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 Researcherนาง อำไพ พรหมณเรศที่ทำงาน:ศูนย์วิจัยข้าวโพดและข้าวฟ่างแห่งชาติ คณะเกษตร สาขาที่สนใจ:การปรับปรุงพันธุ์พืช Resume |
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