OCDs in Balanced Treatment Incomplete Block Design Set-Up

2015 ◽  
pp. 113-130
Author(s):  
Premadhis Das ◽  
Ganesh Dutta ◽  
Nripes Kumar Mandal ◽  
Bikas Kumar Sinha
Keyword(s):  
Block Design ◽  
Incomplete Block ◽  
Incomplete Block Design ◽  
Set Up

OCDs in Balanced Incomplete Block Design Set-Up

2015 ◽  
pp. 41-63
Author(s):  
Premadhis Das ◽  
Ganesh Dutta ◽  
Nripes Kumar Mandal ◽  
Bikas Kumar Sinha
Keyword(s):  
Block Design ◽  
Incomplete Block ◽  
Balanced Incomplete Block Design ◽  
Incomplete Block Design ◽  
Balanced Incomplete Block ◽  
Set Up

scholarly journals Accuracy of Ranking Individuals in Field Tests of Different Designs: A Computer Simulation

2006 ◽  
Vol 55 (1-6) ◽  
pp. 70-77 ◽  
Author(s):  
Chang-Yi Xie ◽  
Y.-B. Fu ◽  
A. D. Yanchuk
Keyword(s):  
Computer Simulation ◽  
Genetic Variance ◽  
Block Design ◽  
Additive Genetic Variance ◽  
Field Tests ◽  
Incomplete Block ◽  
Single Tree ◽  
Incomplete Block Design ◽  
Variation Patterns ◽  
Site Variation

Abstract A computer simulation was conducted to investigate the accuracy of ranking individual trees in field tests of different designs. A test population that consists of 900 trees from 45 full-sib families generated by three 6-parent disconnected half-diallels was considered. One incomplete block design with single-tree plots and four complete block designs with 1, 2, 4, and 10-tree row plots were examined. Various narrow-sense heritabilities, site variation patterns (patch sizes and gradient slopes), and two levels of dominant to additive genetic variance ratios (0 and 0.30) were evaluated. Results indicate that the accuracy of ranking depends more on the heritability of the trait and less on the magnitude of the dominant genetic variance, site variation patterns, and field designs. With patchy site variation, differences in ranking accuracy were observed for different designs, but became smaller with higher heritabilities. Impact of environmental gradient on the accuracy of individual ranking was negligible. Incomplete block design with single-tree plots (ICB1) provided the most accurate ranking when heritability was low while complete block design with 2-tree plots (RCB2) appeared to be the best when heritability was high. Large row plot designs were among the least effective in all the simulated scenarios. For traits with medium heritabilities, the statistical efficiencies of ICB1 and RCB with 1 and 2-tree plots are comparable.

scholarly journals Pengaruh Genetik dan Lingkungan Terhadap Pertumbuhan Sengon (Falcataria molucanna) Ras Lahan Jawa

2018 ◽  
Vol 4 (2) ◽  
pp. 35-41
Author(s):  
Mudji Susanto ◽  
Liliana Baskorowati
Keyword(s):  
Block Design ◽  
Incomplete Block ◽  
Incomplete Block Design

Tegakan sengon (Falcataria molucanna) ras lahan Jawa dibangun di  Bali dengan tujuan untuk mengetahui keragaman pertumbuhan yang disebabkan oleh faktor lingkungan dan genetik pada umur 1-3 tahun. Tegakan sengon tersebut dibangunsebagai uji keturunan dengan rancangan Baris Kolom Incomplete Block Design (IBD). Tegakan sengon tersebut menguji 25 famili half-sib dengan single plot. Hasil penelitian menunjukkan bahwa keragaman pertumbuhan yang disebabkanoleh faktor genetik (aditif ) maupun faktor lingkungan berubah-ubah setiap tahun. Pada tahun pertama ragam aditif mempunyai peranan 3,38% untuk tinggi pohon dan 0,67% untuk diameter batang; pada tahun kedua ragam aditif sebesar3,40% untuk tinggi pohon dan 3,05% untuk diameter batang; dan pada tahun ketiga ragam aditif sebesar 3,90% untuk tinggi pohon dan 7,00% untuk diameter batang. Sedangkan sisanya mulai tahun pertama sampai ketiga pertumbuhandipengaruhi oleh ragam lingkungan. Berdasarkan hasil penelitian disimpulkan bahwa pertumbuhan tanaman sengon ras lahan Jawa mayoritas dipengaruhi oleh faktor lingkungan, sehingga disarankan tanaman sengon ras lahan Jawa harusmenggunakan sitim silvikultur yang tepat yang dapat mempercepat pertumbuhan tanaman sengon.

scholarly journals Resolvable (r, λ)-designs and the Fisher inequality

1979 ◽  
Vol 28 (4) ◽  
pp. 471-478 ◽  
Author(s):  
S. A. Vanstone
Keyword(s):  
Block Design ◽  
Incomplete Block ◽  
Balanced Incomplete Block Design ◽  
Incomplete Block Design ◽  
Pairwise Balanced Designs ◽  
Balanced Designs ◽  
Similar Inequality ◽  
Balanced Incomplete Block

AbstractIt is well known that in any (v, b, r, k, λ) resolvable balanced incomplete block design that b≧ ν + r − l with equality if and only if the design is affine resolvable. In this paper, we show that a similar inequality holds for resolvable regular pairwise balanced designs ((ρ, λ)-designs) and we characterize those designs for which equality holds. From this characterization, we deduce certain results about block intersections in (ρ, λ)-designs.

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