54 research outputs found
Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots
Although breeders have made significant progress in the genetic
improvement of cassava ( Manihot esculenta Crantz) for agronomic
traits, lack of information on heritability and limited testing of
high-throughput phenotyping methods are major limitations to improving
root quality traits, such as softness after cooking, which rank high
among Ugandan consumers. The objectives of this study were to determine
heritability for softness of cooked cassava roots, and quantify the
relationship between penetrometer and consumer testing methods for
phenotyping softness of cassava roots. Softness defined as the maximum
force (N) needed to penetrate cooked root samples using a penetrometer,
was evaluated at four cooking time intervals: 15, 30, 45, and 60 min on
268 cassava genotypes. Estimates of broad-sense heritability
(repeatability) ranged from 0.17 to 0.37, with the highest value
observed at 45 min of cooking time interval. In the second study
involving 135 cassava consumers from Kibaale district in Uganda,
penetrometer measurements of cooked roots from six cassava varieties
were found to be in strong agreement (r2 = 0.91; P-value = 0.003) with
ordinal scores of root softness from consumer testing. These results
suggest that: (a) softness of cooked cassava roots is a trait amenable
for evaluation and selection; and (b) a penetrometer can readily be
used for assessment of cooked root softness. These findings form the
basis for operationalising the routine assessment of root softness in
cassava breeding trials, an output that will enhance ongoing efforts to
breed for desired end-user root quality traits.Les s\ue9lectionneurs ont fait des progr\ue8s consid\ue9rables
dans l\u2019am\ue9lioration g\ue9n\ue9tique des caract\ue8res
agronomiques du manioc ( Manihot esculenta Crantz). Cependant un
manque de m\ue9thodes de ph\ue9notypage haut-d\ue9bit
adapt\ue9es aux caract\ue8res de qualit\ue9s tel que la
fermet\ue9 de la racine apr\ue8s cuisson, essentiel pour les
consommateurs Ougandais. Cette \ue9tude ambitionne a) de determiner
l\u2019h\ue9ritabilit\ue9 de la fermete de racine cuite b) de
quantifier la relation entre l \ue9valuation de la fermet\ue9 de
racine cuite au p\ue9n\ue9trom\ue8tre et un panel consommateurs.
Cette \ue9valuation a \ue9t\ue9 realisee a quatre intervals de
temps: 15, 30, 45 et 60 minutes sur 268 genotypes de manioc. Pour
d\ue9finir l\u2019h\ue9ritabilit\ue9 de la fermet\ue9 de la
racine, celle ci a \ue9t\ue9 d\ue9finie par la force maximum (N)
n\ue9cessaire pour p\ue9n\ue9trer des \ue9chantillons de
racines incluant diff\ue8rent temps de cuisson (15, 30, 45, and 60
min) a l\u2019aide d\u2019un p\ue9n\ue9trom\ue8tre.
L\u2019h\ue9ritabilit\ue9 au sens large (ou
r\ue9p\ue9tabilit\ue9) observ\ue9e varie de 0.17 a 0.37, la
valeur la plus \ue9lev\ue9 \ue9tant observ\ue9e pour un temps
de cuisson de 45 minutes. Dans une seconde \ue9tude impliquant 135
consommateurs du district de Kibaale (Ouest de l\u2019Ouganda), les
mesures au p\ue9n\ue9trom\ue8tre de racines cuites de six
vari\ue9t\ue9s ont confirm\ue9es la forte correlation (r2 = 0.91;
P-value = 0.003) avec les valeurs ordinales de fermet\ue9 de racine
du panel consommateur. Les r\ue9sultats de cette \ue9tude indiquent
que cette m\ue9thodologie de ph\ue9notypage est a) utile pour
l\u2019 \ue9valuation de la fermet\ue9 sur des racines cuites en
selection et b) d\ue9montre que l\u2019usage du
p\ue9n\ue9trom\ue8tre est efficace pour celle ci. Ces
r\ue9sultats offrent aux s\ue9lectionneurs une methode d\u2019
\ue9valuation de routine de la qualite de racine pour les essais
experimentaux. Ceux ci contribueront aux efforts actuels pour
l\u2019am\ue9lioration des caract\ue8res qualit\ue9s chers aux
consommateurs
The Sudbury Neutrino Observatory
The Sudbury Neutrino Observatory is a second generation water Cherenkov
detector designed to determine whether the currently observed solar neutrino
deficit is a result of neutrino oscillations. The detector is unique in its use
of D2O as a detection medium, permitting it to make a solar model-independent
test of the neutrino oscillation hypothesis by comparison of the charged- and
neutral-current interaction rates. In this paper the physical properties,
construction, and preliminary operation of the Sudbury Neutrino Observatory are
described. Data and predicted operating parameters are provided whenever
possible.Comment: 58 pages, 12 figures, submitted to Nucl. Inst. Meth. Uses elsart and
epsf style files. For additional information about SNO see
http://www.sno.phy.queensu.ca . This version has some new reference
Education and selfâregulation of learning for gifted pupils: systemic design and development
Highly-parallelized simulation of a pixelated LArTPC on a GPU
The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the simulation of a pixelated charge readout for time projection chambers, given the large number of channels that this technology employs. Here we present the first implementation of a full microphysical simulator of a liquid argon time projection chamber (LArTPC) equipped with light readout and pixelated charge readout, developed for the DUNE Near Detector. The software is implemented with an end-to-end set of GPU-optimized algorithms. The algorithms have been written in Python and translated into CUDA kernels using Numba, a just-in-time compiler for a subset of Python and NumPy instructions. The GPU implementation achieves a speed up of four orders of magnitude compared with the equivalent CPU version. The simulation of the current induced on 10^3 pixels takes around 1 ms on the GPU, compared with approximately 10 s on the CPU. The results of the simulation are compared against data from a pixel-readout LArTPC prototype
New York Economic Handbook 1970: Agricultural Situation and Outlook
U.S.D.A. Agriculture Handbook No. 373 entitled ''Handbook of Agricultural Charts 1969" provides current reference material pertaining to the nation's agricultural situation. This handbook is used by many agriculturalists throughout the United States. Cornell A. E. Ext. 546 entitled "New York Economic Handbook 1970" is a companion reference for the U.S.D.A. Handbook. Economic information pertaining to New York agriculture and to the general economic situation and outlook has been compiled in this publication. It is prepared primarily for the use of professional agricultural workers in New York State. The first part of this Economic Handbook deals with general topics and the balance covers the commodities. For ease in locating material, different colors are used for each section. "Current Economic Situation" is a two-page monthly release which carries the latest figures for selected economic indicators. This release is essentially a supplement to the Economic Handbook. It is available to anyone who requests to be on the mailing list
New York Economic Handbook 1971: Agricultural Situation and Outlook
U.S.D.A. Agriculture Handbook No. 397 entitled "1970 Handbook of Agricultural Charts" provides current reference material pertaining to the nation's agricultural situation. This handbook is used by many, agriculturalists throughout the United States. Cornell A.E. Ext. 571 entitled "New York Economic Handbook 1971" is a companion reference for the U.S.D.A. Handbook. Economic information pertaining to New York agriculture and to the general economic situation and outlook has been compiled in this publication. It is prepared primarily for the use of professional agricultural workers in New York State. The first part of this Economic Handbook deals with general topics and the balance cover the commodities. For ease in location material, different colors are used for each section. "Current Economic Situation" is a two-page monthly release which carries the latest figures for selected economic indicators and highlights of current developments. This release is essentially a supplement to the Economic· Handbook, It is available to anyone who requests to be on the mailing list
Cytochemical Analysis of Calcium Distribution in the Superficial Pineal Gland of the Mongolian Gerbil
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