Crossbreeding for lamb production. 1. Survival and growth of first cross lambs

1972 ◽  
Vol 12 (56) ◽  
pp. 234 ◽  
Author(s):  
NM Fogarty
Keyword(s):  
Reproductive Performance ◽  
Agricultural Research ◽  
First Grade ◽  
Stages Of Growth ◽  
Survival And Growth ◽  
The Difference ◽  
Growth Characters

The reproductive performance was studied of two groups each of 450 Peppin Merino ewes joined to Merino, Border Leicester and Dorset Horn rams in two years at the Cowra and Glen Innes Agricultural Research Stations. The survival and growth of the progeny was assessed to weaning with the wether progeny subsequently slaughtered and carcase weight and grade compared. There was little difference in the survival of lambs sired by Border Leicester or Dorset Horn rams and, for both, survival was about three per cent lower than that of Merino lambs at birth and also from birth to weaning. The single crossbred lambs were markedly heavier than the single Merino lambs at all stages of growth, but the difference between twins was considerably reduced, which gave sigrdicant breed X type of birth interactions for all growth characters examined. The Dorset X Merino lambs were 2.5 per cent heavier at weaning and had three per cent heavier carcases than the Border X Merino lambs. The heavier carcas weights for the Dorset X Merino lambs was mainly due to higher dressing percentages. There were significantly more first grade carcases amongst the crossbred than the Merino lambs, with a higher proportion of Dorset X Merino carcases in the first grade than Border X Merino.

Heterogeneity of lifetime reproductive performance, its components and associations with wool production and liveweight of Merino ewes

2009 ◽  
Vol 49 (7) ◽  
pp. 624 ◽  
Author(s):  
G. J. Lee ◽  
K. D. Atkins ◽  
M. A. Sladek
Keyword(s):  
Reproductive Performance ◽  
Agricultural Research ◽  
Fibre Diameter ◽  
Research Centre ◽  
Reproduction Rate ◽  
High Performing ◽  
Management Interventions ◽  
The Difference ◽  
Fleece Weight ◽  
Net Reproduction

The heterogeneity in lifetime (2–6 years of age) reproductive performance within three research flocks maintained at the Agricultural Research Centre, Trangie, in central-western New South Wales, was used to establish the potential to improve flock reproductive performance by identifying performance segments for either selection or for differential management. The data comprised a total of 32 716 records from 7322 ewes, collected over the period from 1977 to 2003. Within each of the flocks, there were large differences (P < 0.001) in lifetime net reproduction rate, and each of its components (fertility, fecundity and lamb survival), between each of the net reproduction rate quartiles. The difference in net reproduction between the ewes in the top quartile and those in the bottom quartile was equivalent to an additional lamb per ewe annually. These differences in reproduction rate between the quartiles were not related to pre-joining liveweight or condition score. Higher reproductive rates were associated with a cost to clean fleece weight, although the estimated effects on fibre diameter were small. Opportunities to use this variation to improve reproduction rates are discussed and include retaining high-performing ewes longer in the breeding flock, removing poor performers and targeting management interventions towards ewes that will yield the largest responses.

Hybrid vigour and lamb production. 1. Reproductive performance of the purebred and crossbred matings

1978 ◽  
Vol 18 (95) ◽  
pp. 745 ◽  
Author(s):  
BJ McGuirk ◽  
ME Bourke
Keyword(s):  
Reproductive Performance ◽  
Agricultural Research ◽  
New South ◽  
Research Station ◽  
Hybrid Vigour ◽  
Mating Activity ◽  
South Wales ◽  
Breed Difference ◽  
The Difference ◽  
Mixed Flock

An experiment was conducted at Cowra Agricultural Research Station, New South Wales, to determine the importance of hybrid vigour to the productivity of crosses between Border Leicester and Merino sheep. In five years, 1963 to 1967, Border Leicester (BL) and Merino (M) rams were paddock-joined to a mixed flock of ewes of both breeds for five weeks in March-April. The results of these purebred and crossbred matings have been compared. Cummulative weekly raddle counts were similar for both purebred mating groups (BL x BL and M x M) and by the end of joining over 95 per cent of ewes in both groups had been raddled. When the mating data for the Border Leicester ewes were examined, Merino rams raddled fewer ewes than did Border Leicester rams. This breed difference between rams was significant for the number of ewes raddled by the end of both the first and second week of joining (P < 0.05) and the difference in favour of the Border Leicester rams was still apparent at the end of joining (97 vs. 86 per cent, not significant). The reproductive performance of the Merino ewes (M x M) was superior to that of the- Border Leicesters (BL x BL), with 1.05 vs. 0.93 lambs born per ewe joined. The Border Leicester flock had higher incidences of both dry ewes (63.7 vs. 79.3 per cent ewes lambing of those joined) and multiple births (1.47 vs. 1.33 lambs born per lambing ewe). Because of the difference in the mating activity of the two Border Leicester ewe flocks (M x BL vs. BL x BL), the most reliable estimates of the relative performance of purebred and crossbred matings were given by the number of lambs born per lambing ewe, and the number of ewes lambing to first service. The crossbred matings were superior for both characteristics, by 4.6 and 5.7 per cent respectively, but neither difference was statistically significant.

THE GROWTH OF IQ AMONG ESTONIAN SCHOOLCHILDREN FROM AGES 7 TO 19

2004 ◽  
Vol 36 (6) ◽  
pp. 735-740 ◽  
Author(s):  
HELLE PULLMANN ◽  
JÜRI ALLIK ◽  
RICHARD LYNN
Keyword(s):  
Secondary School ◽  
School Children ◽  
Growth Pattern ◽  
Representative Sample ◽  
Sampling Error ◽  
First Grade ◽  
Maturation Process ◽  
Different Populations ◽  
The Mean ◽  
The Difference

The Standard Progressive Matrices test was standardized in Estonia on a representative sample of 4874 schoolchildren aged from 7 to 19 years. When the IQ of Estonian children was expressed in relation to British and Icelandic norms, both demonstrated a similar sigmoid relationship. The youngest Estonian group scored higher than the British and Icelandic norms: after first grade, the score fell below 100 and remained lower until age 12, and after that age it increased above the mean level of these two comparison countries. The difference between the junior school children and the secondary school children may be due to schooling, sampling error or different trajectories of intellectual maturation in different populations. Systematic differences in the growth pattern suggest that the development of intellectual capacities proceeds at different rates and the maturation process can take longer in some populations than in others.

128 Differences in PRRSV Resilience for Reproductive Performance Between Landrace and Duroc Sows

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 18-19
Author(s):  
Felipe Hickmann ◽  
José Braccini Neto ◽  
Luke M Kramer ◽  
Kent A Gray ◽  
Yijian Huang ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Mixed Model ◽  
Performance Data ◽  
The Other ◽  
Wild Type ◽  
Prrs Virus ◽  
The Difference ◽  
The Impact

Abstract Studies on differences in resilience to porcine reproductive and respiratory syndrome (PRRS) virus (PRRSV) between breeds are scarce in the literature. Thus, the objective of this work was to assess PRRSV resilience in PRRSV wild-type infected sows from two breeds. Farrowing data included 2546 and 2522 litters from 894 Duroc and 813 Landrace sows, respectively, which were housed together and experienced the same PRRSV outbreak. Traits used for this study were number of piglets born alive (NBA), number born dead (NBD), total number born (TNB), and number weaned (NW). The impact of PRRSV infection was evaluated by comparing the reproductive performance of breeds between PRRS phases (pre-PRRS, PRRS, and post-PRRS). PRRS phases were defined based on the reproductive performance data. NBA, NBD, and NW were analyzed as a proportion of TNB using a Poisson mixed model. Pre-defined contrasts were used to evaluate the effect of breed on PRRSV resilience and on return to PRRSV-free performance, representing the differences between breeds for the difference between pre-PRRS and PRRS phases, and pre-PRRS and post-PRRS phases, respectively. There was a significant (P ≤ 0.003) interaction between PRRS phase and breed for all traits, as shown in Table 1. In general, reproductive performance reduced from pre-PRRS to PRRS, and then increased from PRRS to post-PRRS, as expected. The resilience contrast was significant for all traits (P ≤ 0.003). In all cases, the drop in percent reproductive performance from pre-PRRS to PRRS was lower for Duroc than for Landrace, indicating that Duroc sows have greater PRRSV resilience than Landrace sows. The return to PRRSV-free performance contrast had a trending effect for NBD (P = 0.055), and it was not significant for the other traits (P ≥ 0.515). These results indicate that Duroc sows have overall greater phenotypic PRRSV resilience for reproductive performance than Landrace sows.

scholarly journals Performance Of Bilati Dhonia (Eryngium Foetidum L.) Under The Canopy Of Different Tree Species

1970 ◽  
Vol 36 (2) ◽  
pp. 255-262
Author(s):  
M Moniruzzaman ◽  
AKM Qamruzzaman
Keyword(s):  
Tree Species ◽  
Agricultural Research ◽  
Leaf Length ◽  
Research Station ◽  
Direct Sunlight ◽  
Hill District ◽  
Eryngium Foetidum ◽  
Number Of Leaves ◽  
Sun Light ◽  
Growth Characters

Performance of ‘Bilati Dhonia’ (Eryngium foetidum L.) grown under the shades of different tree species, namely guava, jackfruit, mango, jujube, and farmers’ practice (grown under artificial shade) was evaluated at the Agricultural Research Station, Raikhali, Rangainati Hill District during two consecutive years of 2004-05 and 2005-06. The results revealed that plant height, leaf length, number of leaves per plant and fresh weight per plant were significantly higher under the canopies of various trees and farmers’ practice than those grown under direct sun light. Different growth characters were better under the shades of jackfruit and guava trees than those of other species. Periods to first and 50% flowering under tree species were longer than that under direct sunlight. The highest fresh yield (mean of two years) of ‘Bilati Dhonia’ was found in the farmers’ practice (27.58 t/ha), which was similar to those under guava (27.31 t/ha) and jackfruit trees (27.51 t/ha). Keywords: Bilati Dhonia (Eryngium foetidum L.); tree shades; hilly area. DOI: http://dx.doi.org/10.3329/bjar.v36i2.9252 BJAR 2011; 36(2): 255-262

scholarly journals THE EFFECT OF BLINDFOLD GAME ON STUDENTS’ VOCABULARY ACHIEVEMENT AT SMP NEGERI 13 KENDARI

2020 ◽  
Vol 5 (3) ◽  
pp. 200
Author(s):  
Andi An-Nisaa Arfin ◽  
Kamaluddin Kamaluddin ◽  
Wa Ode Fatmawati
Keyword(s):  
Junior High School ◽  
Alternative Hypothesis ◽  
First Grade ◽  
First Year ◽  
First Year Students ◽  
Comparison Research ◽  
Significant Difference ◽  
Post Test ◽  
The Difference ◽  
Vocabulary Achievement

The purpose of conducting this research is to examine the difference NGain scores between students who learn vocabulary with Blindfold Game and students who learn vocabulary without Blindfold Game at the first year students of SMP Negeri 13 Kendari. The samples of this research are the first grade four (VII-4) and the first grade three (VII-3) which consists of 27 students for each class. This research is conducted in comparison research design that consists of experimental class (VII-4) and controll class (VII-3). The data of this research are collected by giving pre-test and post-test in two classes (VII-4 & VII-3). The result shows that there is an improvement of the students’ vocabulary achievement. Independent samples t-test shows that, there is a significant difference in the Ngain scores for experimental class ( M = 60.08,  SD = 9.36 ) and controll class ( M = 20.41, SD = 14.56 ), t (52) = 11.904, p (0.000) < 0.05. Therefore, it can be concluded that the value of Sig (2 tailed) is lower than the significance α value (0.000 < 0.05). In other words, alternative hypothesis (H1) is accepted and the null hypothesis (H0) is rejected. It means that the Blindfold game can enrich students’ vocabulary achievement for Junior High School Student.

scholarly journals Evaluation of Wheat Genotypes in Far Western Hills of Nepal

2015 ◽  
Vol 3 (3) ◽  
pp. 417-422
Author(s):  
Hari Kumar Prasai ◽  
Jiban Shrestha
Keyword(s):  
Grain Yield ◽  
River Basin ◽  
Treatment Effect ◽  
Agricultural Research ◽  
Research Station ◽  
Combined Analysis ◽  
Wheat Genotypes ◽  
Yield Trial ◽  
The Difference ◽  
Year 2013

Coordinated Varietal Trial (CVT) and Advanced Varietal Trial (AVT) of wheat were conducted at Regional Agricultural Research Station,Doti during the year 2012 and 2013. Microplot Yield Trial (MPYT) were conducted during the year 2013. Total 20 genotypes were includedin CVT experiment of both years. Although the difference in grain yield due to genotypes was not found significant during the year 2012, NL1144 recorded the highest grain yield (4309 kg/ha) followed by NL 1140 (4295 kg/ha) and NL 1147 (4165 kg/ha) respectively. But in the year2013, NL 1097 produced the highest grain yield (4641 kg/ha) followed by NL 1135 (4383 kg/ha) and NL 1164 (4283 kg/ha) respectively.Statistically, the difference in grain yield due to genotypes was not found significant in the year 2013. Combined analysis over years was alsocarried out. Out of 20, only 10 genotypes were included in the CVT experiment, which were found similar in both years. Genotypes NL 1097(4079 kg/ha), NL 1140 (3814 kg/ha) and NL 1093 (3773 kg/ha) were found high yielding genotypes for river basin agro-environment of farwestern hills. Statistically, effect of year in tested characters was found significant whereas treatment effect was observed non-significant.Similarly, 20 genotypes of wheat were included in AVT of wheat during the year 2012 and 2013. Out of the genotypes included in AVT duringthe year 2012, KISKADEE No.1recorded the highest grain yield (3824 kg/ha) followed by CHEWINK No. 1 (3643 kg/ha) and WK 2120 (3583kg/ha). Statistically all the tested characters except grain yield were found significantly different due to genotypes. But in the same experimentof the year 2013, WK 2412 genotype recorded the highest grain yield (4407 kg/ha) followed by WK 2411 (4329 kg/ha) and Munal-1 (4054kg/ha). Statistically the difference in grain yield and other tested characters were found significantly different. Due to dissimilarity in the testedgenotypes we could not carry-out the combined analysis over years. Total 30 genotypes were included in the MPYT experiment of the year2013. Genotype WK 2272 recorded the highest grain yield (6080 kg/ha) followed by the genotypes WK 2274 (5152 kg/ha) and WK 2278(4480 kg/ha) respectively. Statistically, the difference in grain yield and other tested characters were found significantly different due togenotypes.Int J Appl Sci Biotechnol, Vol 3(3): 417-422

Effects on reproduction of prolonged grazing of oestrogenic pastures by ewes

1968 ◽  
Vol 19 (6) ◽  
pp. 1059 ◽  
Author(s):  
HE Fels ◽  
HG Neil
Keyword(s):  
Reproductive Performance ◽  
Reproductive Tract ◽  
Subterranean Clover ◽  
Fertilization Rate ◽  
Reproductive Tract Infections ◽  
Significant Difference ◽  
The Difference ◽  
Tract Infections

Six-year-old ewes, the survivors of two experimental groups that had grazed from May to October through the 5 preceding years on mixed pastures containing an oestrogenic variety (Dwalganup) of subterranean clover ("clover" group) and oat crops ("oats" group), were mated 6 months after their last exposure to oestrogenic pasture and allocated for slaughter to observe the fertilization rate of eggs or the numbers of surviving embryos. In late April the clover and oats groups did not differ significantly in the proportion of eggs fertilized (13/15 eggs v. 11/11) but in May there was a highly significant difference (4/12 v. 14/17). The difference between late April and May in the clover group was significant and was associated with changes in the ratio of oestrous ewes to rams. The ratio of live embryos to eggs shed was much higher in the oats than in the clover group (56173 v. 8/39). After estimating how many of these eggs had been fertilized it was concluded that more fertilized eggs developed successfully in the oats than in the clover group (c. 56/65 v. 8/17). The data suggested that more "clover" embryos died during days 13–19 of pregnancy. Significantly more clover group ewes had obvious reproductive tract infections. These ewes did not show oestrus regularly though they may have ovulated more or less regularly. Other clover group ewes showed oestrus as regularly as oats group ewes. Clover group ewes had many more macroscopic endometrial cysts in their uteri and cervices, but within groups, numbers of cysts were not significantly associated with previous or current reproductive performance.

The effect of feed restriction on sexual maturity and initial reproductive performance of broiler pullets under different light treatments

1969 ◽  
Vol 9 (39) ◽  
pp. 417 ◽  
Author(s):  
RAE Pym ◽  
R Sledge
Keyword(s):  
Body Weight ◽  
Reproductive Performance ◽  
Sexual Maturity ◽  
Feed Restriction ◽  
Restricted Feeding ◽  
Egg Weight ◽  
Laying Performance ◽  
The Mean ◽  
The Difference ◽  
Lighting Systems

An experiment was conducted to examine the effect of restricted feeding under two lighting systems during the rearing period on the initial laying performance of broiler type pullets. The rearing treatments were imposed at nine weeks of age, removed at 22 weeks and the trial was discontinued at 36 weeks of age. The feeding treatments (restricted versus ad lib.) were arranged factorially with the lighting treatments (decreasing versus increasing). Birds reared on restricted feeding reached sexual maturity 16 days later than full fed birds, ate 17 per cent less feed to 22 weeks and gained seven per cent less in body weight to 24 weeks of age and ten per cent less to 36 weeks. Birds reared under the decreasing lighting regime reached sexual maturity at the same age as those reared under increasing lighting, ate five per cent more feed during the rearing and laying periods and gained five per cent more in body weight to 24 weeks. The mean weight of eggs laid between 24 and 34 weeks of age from pullets subjected concurrently to decreasing lighting and restricted feeding was approximately two grams heavier than that of the other three treatment combinations. Mean egg weight was one gram greater in the restricted than in the full fed group, although the difference was not statistically significant. Laying mortality was lower in the restricted fed group than in the full fed group.

Learning, Development, and Training

2016 ◽  
Vol 7 (4) ◽  
pp. 85-104 ◽  
Author(s):  
Charlotte L.V. Thoms ◽  
Sharon L. Burton
Keyword(s):  
Training Model ◽  
Learning And Development ◽  
Educational Design ◽  
Business Environments ◽  
Training Development ◽  
Survival And Growth ◽  
The Difference ◽  
Adaptation Practice ◽  
Learning Development ◽  
And Training

Continuous learning is essential in academic and business environments for the 21st century learner as success, survival, and growth lean toward the educator answering the question, ‘Which educational design best facilitates educators in becoming learner-focused while producing adaptive completers in this ubiquitous learning environment?' This research team proposes a unique but growing solution around educational synergies in which all learner-focused groups drive the understanding of learning, adaptation, practice, and change. To clarify the difference between training, development, and learning, the following are discussed: 1. reviewing success in learning, as a continuum into the processes of survival and growth; 2. conceptualizing the training model situated inside learning and development; and 3. synergizing the educational epistemology that bridges the gap between training and learning. Last, grouping of key trends expanded through theory and technology to support concrete recommendations for analyzing the influence of synergies through educational evolution around training, development, and learning.

Sign in / Sign up

Export Citation Format

Share Document