scholarly journals APPLICATION OF AUGMENTED DESIGNS FOR FIELD EVALUATION OF BREAD WHEAT DOUBLED HAPLOID LINES: A PRELIMINARY REPORT

AGROFOR ◽  
2018 ◽  
Vol 2 (3) ◽  
Author(s):  
Demetrios DIKEOPHYLAX ◽  
Iordanis OSSOUTZOGLOU ◽  
Chryssanthi PANKOU ◽  
Athanasios MAVROMATIS ◽  
Anastasios LITHOURGIDIS ◽  
...  

Doubled-haploid is an effective method to produce 100% homozygous lines in asingle generation accelerating the release of new varieties and reducing thecorresponding expenses. However, the existing problem in cases where theadequate quantity of seeds is limited is the inability to evaluate new germplasm inreplicated experiments. In his attempt to confront this problem, Petersen proposedin 1985 the evaluation of new germplasm to be based on its division in blocks andselection to be performed regarding the yield of the randomly repeated control ineach block. The aim of the present study was to use the aforementioned method toevaluate preliminary 37 doubled-haploid lines (DHL). The parental varieties of theDHLs,Greek cultivars “Acheloos” and “Vergina”, were used as controls. For thepurpose of the study, 35 main spikes, one form each DHL and control, were used.The length of the spikes was measured, the number of spikelets was counted, andthe 1000 kernel weight and total yield were recorded. The data analysis revealedthat only one line exceeded the mean number of spikelets of the controls, oneexceeded the mean yield of the controls and two exceeded the mean 1000 kernelweight of the controls (one was even better than the best control). The reportedresults indicate the presence of valuable genetic variability among the DHL aftercrossing cultivars “Acheloos” x “Vergina”. Further research is needed, after DHLsmultiplication, using more plants and locations to draw more reliable conclusions.

2017 ◽  
Vol 1 (3) ◽  
pp. 122
Author(s):  
Ni Komang Amelia Kartadi

This study aimed at investigating of the effect of using word family game committed by the fifth grade student in SD Negeri 1 Astina in mastering the English vocabulary. This study was True-Experimental with post-test only control group design. The population was 59 students of the fifth grade and the sample was selected by using cluster random sampling. The sample of this research study was 22 students in 5A as an Experimental Group while 22 students in 5B as a Control Group. The experimental group was taught by using Word Family Game and control group was taught without using Word Family Game. The data was analyzed descriptively and inferentially through SPSS 16.0 Program. Descriptively, the students in experimental group were achieved better than the students in control group. It was proven by the result of the mean score of the experimental group was 90.45, while the mean score of control group was 83.18. The result of the t-test also showed that the score of the (tobs) was 3.393 which the score of (tcv) was 1.682 which based on the degree of freedom was 42. It showed that the (tobs) > (tcv), where: 3.393 > 1.682. It could be concluded that the word family game had a significant effect on the students’ vocabulary mastery rather than using conventional teaching. 


1980 ◽  
Vol 60 (1) ◽  
pp. 79-85 ◽  
Author(s):  
PIERRE TURCOTTE ◽  
C. A. ST-PIERRE ◽  
KEH MING HO

Pedigree and doubled haploid lines from seven crosses of barley (Hordeum vulgare L.) were compared over 2 years. The lines were tested, in a randomized complete block design, in row plots at Ste-Foy in 1977 and in hill plots at Brawley, California in 1978. There are significant differences between the two methods of pure line production for grain yield, 1000-kernel weight, plant height, resistance to lodging and date of maturity. Furthermore, these significant differences between doubled haploid and pedigree lines seem to be tied to wide crosses. After showing that doubled haploids are superior for resistance to lodging, we conclude that the use of doubled haploid lines must be seriously considered in a barley breeding program on the basis of improved selection efficiency and the short time required to get homozygous lines.


2010 ◽  
Vol 35 (7) ◽  
pp. 563-568 ◽  
Author(s):  
J. Wangdell ◽  
J. Fridén

Reconstruction of grip in tetraplegia aims to improve upper extremity performance and control in daily life. We evaluated the effects of surgery and rehabilitation on performance and satisfaction of patient identified activity goals in 20 patients (22 arms) who had grip reconstructions for both finger and thumb flexion. Patients assessed an improvement in both performance and satisfaction after surgery in all groups of activities assessed using the Canadian Occupational Performance Measure (COPM). The mean improvement at 6 and 12 months was 3.5 points better than the 2.5 points before surgery. Before surgery 36% of the goals identified were impossible to perform. After surgery, 78% of these goals were possible. The largest improvement was observed in the basic activity of ‘eating’ but significant improvement was also noted in activities generally regarded as complex and not measured in standard ADL such as ‘doing housework’ and taking part in ‘leisure’.


1978 ◽  
Vol 58 (4) ◽  
pp. 929-933 ◽  
Author(s):  
E. REINBERGS ◽  
L. S. P. SONG ◽  
T. M. CHOO ◽  
K. J. KASHA

The effect of complete homozygosity and homogeneity on stability of grain yield in barley was studied in 38 doubled haploid lines derived from F1 plants of six biparental crosses. The number of doubled haploid lines in each cross ranged from 3 to 12. These along with 13 check cultivars were evaluated at five locations in Ontario in 1975 and 1976. The linear regression method proposed by Eberhart and Russell in 1966 was used to analyze the stability of grain yield. In general, the response of doubled haploid lines to different environments, based upon the regression coefficient, did not differ from the response of the check cultivars. Similar responses were also observed among check cultivars, among crosses, and among doubled haploid lines within crosses. Furthermore, the pooled deviation from regression mean squares for the check cultivars was not different from that for the doubled haploid lines. The mean yield of the doubled haploid lines was as high as that of the check cultivars. Significant differences in mean yield among crosses was not detectable but considerable genetic variability in grain yield was found among lines within three of the crosses. It appears that under Ontario conditions homogeneous and homozygous lines derived by the doubled haploid method are as good agronomically and have yields as stable as the licensed cultivars developed by conventional breeding methods.


1987 ◽  
Vol 67 (4) ◽  
pp. 1083-1088 ◽  
Author(s):  
J. A. IVANY

Experiments conducted over 4 yr (1982–1985) determined the efficacy of metsulfuron for use in spring barley (Hordeum vulgare L. ’Volla’) and effects of herbicide residues on crops grown the next season. Barley tolerated metsulfuron at rates up to 72 g a.i. ha−1 with no significant effects on yield but 1000-kernel weight was significantly reduced in two of the three barley crops grown. Control of lamb’s-quarters (Chenopodium album L.) and low cudweed (Gnaphalium uliginosum L.) was acceptable and that of corn spurry (Spergula arvensis L.) and shepherd’s-purse (Capsella bursa-pastoris (L.) Medic.) better than the standard MCPA amine treatment. There was no significant effect on marketable and total yield of rutabaga (Brassica napobrassica Mill.) or potato (Solanum tuberosum L.) and none on total yield of silage corn (Zea mays L.) when each was grown the season after metsulfuron use. Reductions in corn root growth were noted in bioassay tests as late as 120 d after metsulfuron application but the lack of effects on yields of succeeding crops would indicate that the remaining residues were broken down or diluted by plowing and working the soil.Key words: Metsulfuron, barley, potato, rutabaga, silage corn, persistence


2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Yulia Yulia

The purpose of this study is to determine the understanding on mathematic concept who were taught by using Quick On The Draw Technique was better than the students who were taught by using conventional technique at Class VIII SMPN 1 Ranah Batahan Kabupaten Pasaman Barat. Quasi experimental that designed randomized control group only design. The population of this research was class VIII students of SMP N 1 Ranah Batahan Kabupaten Pasaman Barat of 4 class. For determine the experimental class and the control class is done by randomly. Classes are chosen as experimental class is a class experiment is VIII.2 class and control class is the class VIII.3.. It can be seen from the mean score of experiment class 70.89,  control class was 57.78. Hypothesis testing by using t-test showed that t-was higher than  (1.97 > 1.68) with degree of freedom 95% so hypothesis is accepted. In conclusion, students’ understanding on mathematic concept who were taught by using Quick On The Draw technique was higher than the students who were taught by using conventional technique at calss VIII of SMPN 1 Ranah Batahan Kabupaten Pasaman Barat. Based on the above description the researcher gives advice to mathematical educator, to make quick on the draw technique as one of alternative to improve understanding of mathematical concepts of learners.Keyword : Quick on the draw technique, Understanding on mathematic concept


2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Yulia Yulia ◽  
Asmaiwaty Arief ◽  
Apria Nora

The purpose of this study is to determine the understanding on mathematic concept who were taught by using Quick On The Draw Technique was better than the students who were taught by using conventional technique at Class VIII SMPN 1 Ranah Batahan Kabupaten Pasaman Barat. Quasi experimental that designed randomized control group only design. The population of this research was class VIII students of SMP N 1 Ranah Batahan Kabupaten Pasaman Barat of 4 class. For determine the experimental class and the control class is done by randomly. Classes are chosen as experimental class is a class experiment is VIII.2 class and control class is the class VIII.3. The hypothesis of this study is understanding on mathematic concept who were taught using Quick On The Draw Technique was better that the students who were taught using conventional technique at class VIII of SMPN 1 Ranah Batahan Kabupaten Pasaman Barat. Based on the result of final test students’ understanding on mathematic concept in experiment class was higher than the control class. It can be seen from the mean score of experiment class 70.89,control class was 57.78.Hypothesis testing by using t-test showed that t-was higher than t-hitung>t-tabel  (1.97 > 1.68) with degree of freedom 95% so hypothesis is accepted. In conclusion, students’ understanding on mathematic concept who were taught by using Quick On The Draw technique was higher than the students who were taught by using conventional technique at calss VIII of SMPN 1 Ranah Batahan Kabupaten Pasaman Barat. Based on the above description the researcher gives advice to mathematical educator, to make quick on the draw technique as one of alternative to improve understanding of mathematical concepts of learners.Keyword : Quick on The Draw Technique, Understanding on Mathematic Concept


Author(s):  
Chuanjin Lan ◽  
Zhen Li ◽  
Yanbao Ma

To make the best use of solar energy, most solar plants are located in deserts or dry and sandy areas, where most of the sand originate in sandstorms and desertification. For large scale solar plants, the structure of the solar panels can reduce the mean wind speed greatly, thus having a great effect on the deposition and entrainment process of the sand and dust. To study the effect of installment of solar panels on wind flow, numerical simulations are applied to get the turbulent flow field in the lee of the solar panels, with inclination angles ranging from 15° to 30° and at different spacing. The results show that 30° is the optimal choice and the performance with larger spacing at 2.5 times panel length is better than the case at 1.5 times.


2017 ◽  
Vol 24 (1) ◽  
pp. 1
Author(s):  
Kartadi Ni Komang Amelia ◽  
Sudirman Sudirman ◽  
Kusuma I Putu Indra

This study aimed at investigating of the effect of using word family game committed by the fifth grade student in SD Negeri 1 Astina in mastering the English vocabulary. This study was True-Experimental with post-test only control group design. The population was 59 students of the fifth grade and the sample was selected by using cluster random sampling. The sample of this research study was 22 students in 5A as an Experimental Group while 22 students in 5B as a Control Group. The experimental group was taught by using Word Family Game and control group was taught without using Word Family Game. The data was analyzed descriptively and inferentially through SPSS 16.0 Program. Descriptively, the students in experimental group were achieved better than the students in control group. It was proven by the result of the mean score of the experimental group was 90.45, while the mean score of control group was 83.18. The result of the t-test also showed that the score of the (tobs) was 3.393 which the score of (tcv) was 1.682 which based on the degree of freedom was 42. It showed that the (tobs) > (tcv), where:  3.393 > 1.682. It could be concluded that the word family game had a significant effect on the students’ vocabulary mastery rather than using conventional teaching.


Genetika ◽  
2013 ◽  
Vol 45 (2) ◽  
pp. 601-610 ◽  
Author(s):  
Velichka Todorova ◽  
Stanislava Grozeva ◽  
Velichka Rodeva ◽  
Stoyka Masheva

The comparative breeding evaluation was carried out with six advanced pepper lines (Capsicum annuum L.) with androgenic origin and their initial pepper variety Hebar during the period 2008 - 2010 in field conditions at Plovdiv, Bulgaria. The genotypes were characterized by total and standard yield, plant height and fruit traits: length, width, wall thickness and weight. The response of two lines (4 and 6) and control variety to the Verticillium wilt was also investigated on artificial infected background. According to the results of the experimental work standard and total yield in all androgenic lines were higher compared to the initial variety but significant differences were established only for lines 1, 2, 4 and 6. Line 6 was characterized with the highest standard yield (4009 kg/da) followed by line 2 (3829 kg/da). They exceeded variety Hebar with 42.26% and 35.89%, respectively. Line 2 formed the heaviest (61.31 g) and longer (11.24 cm) fruits than most studied genotypes. Anther-derived lines were also with a good uniformity by studied traits. In line 6 was registered lower index of infestation byVerticillium dahliae Kleb. than the control during the investigated period. These perspective lines will be included as valuable genetic resources for future pepper breeding programs for development of new varieties.


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