A comparison of the productive performance of single and twin born Merino ewes

1963 ◽  
Vol 3 (10) ◽  
pp. 235 ◽  
Author(s):  
RB Dun ◽  
RS Grewal
Keyword(s):  
Significant Interaction ◽  
Agricultural Research ◽  
Research Station ◽  
Skin Area ◽  
Productive Performance ◽  
Weaning Weight ◽  
The Difference ◽  
Improved Performance ◽  
Fleece Weight ◽  
Level Of Significance

A comparison has been made of the productive performance of448 single and 466 twin born ewes. The data was obtained over eight years from five autumn mated, single character selection flocks maintained at Trangie Agricultural Research Station. The following highly significant, mean percentage differences were recorded in favour of singles :-fold score, 16.5 ; weaning weight, 12.8 ; 18 month body weight, 3.9 ; greasy fleece weight, 2.9. A 4.3 per cent difference in classing score and a 2.2 per cent difference in clean fleece weight approached the 5 per cent level of significance (P<0.1). Weaning weight analysis revealed a significant interaction between year and type of birth caused by the relatively improved performance of twins in years which favoured lamb growth. An analysis of the components of clean fleece weight showed that the lowered wool production of twins was associated with a decrease in the total number of wool fibres per sheep, caused by reductions in skin area and in the proportion of secondary fibres. Twins and singles did not differ in fibre density, diameter or length. The analysis of fertility (total number of lambs mothered at the first two matings) showed a significant interaction between type of birth and jock. Single born Weight Minus ewes were more fertile, whereas in the other four flocks the difference favoured twins. Without the Weaning Weight Minus flock, twins showed a highly significant advantage of 16.9 per cent in percentage lambs mothered. This difference could be wholly accounted for by higher incidence of multiple births.

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

Genotype and age effects on sheep meat production. 1. Production and growth

2007 ◽  
Vol 47 (10) ◽  
pp. 1119 ◽  
Author(s):  
D. L. Hopkins ◽  
D. F. Stanley ◽  
L. C. Martin ◽  
A. R. Gilmour
Keyword(s):  
Significant Interaction ◽  
Meat Production ◽  
Age Group ◽  
Weaning Weight ◽  
Genotype Effect ◽  
Ewe Lambs ◽  
Sheep Meat ◽  
Fleece Weight ◽  
Estimated Breeding Values ◽  
Sire Breed

The growth, wool production and teeth eruption of animals from five genotypes [Poll Dorsetgrowth (PD) × Border Leicester × Merino (BLM); PDg × Merino (M); Poll Dorsetmuscling (PDm) × M; M × M; BL × M] were evaluated over the age span of 4 to 22 months of age. In total, 16 sires were used to generate the animals and these were selected for growth based on estimated breeding values (EBVs), apart from one group (PDm) which was selected for muscling based on EBVs. In total, 595 animals were slaughtered at 4, 8, 14 or 22 months of age. The birthweight of lambs born to BLM ewes was 0.6 kg heavier (P < 0.001) than those born to Merino ewes, and wether lambs were 0.2 kg heavier than ewe lambs (P < 0.001). The yearling weight (YWT) EBV had no effect on birthweight. There were significant (P < 0.001) differences between genotypes for predicted weaning weight at 4 months of age, with a range of 10.6 kg among the groups. The PDg × BLM were the heaviest (37.8 ± 0.7 kg) and the Merino the lightest (27.3 ± 0.8 kg). Wether lambs were 2.0 kg heavier (P < 0.001) than ewe lambs at weaning. The YWT EBV had no effect on weaning weight. There was a significant (P < 0.001) interaction between the age at slaughter and genotype for final liveweight of each age group. The PDg × BLM were the heaviest at each age and the Merinos the lightest, and for the oldest animals, the BLM were significantly (P < 0.05) heavier than PDm × M, whereas at younger ages this was not the case. The significant interaction (P < 0.001) between sex and age at slaughter reflected the increasing difference in liveweight between the sexes as age at slaughter increased. There was also a significant (P < 0.05) interaction between the YWT EBV and age at slaughter. The overall coefficients were –0.01, 0.14, 0.34 and 0.65 for slaughter ages 4, 8, 14 and 22 months, respectively, indicating that in young animals there was no effect of sire YWT EBV on liveweight, but as the animals aged there was an increasing effect such that progeny of sires with high sire YWT EBV were heavier. This effect was evident within all genotypes. There was a sire breed effect on fleece weight and total wool weight (P < 0.001) with Merino-sired hoggets producing 0.4 kg more wool than Border Leicester-sired hoggets and 1.5 kg more than Poll Dorset-sired hoggets. There was a weak genotype effect on time to erupt the first permanent incisor, which if modelled as a proportion of Border Leicester (0, 1/4, 1/2) was significant (–34 ± 12 days, P < 0.05), Border Leicester earlier than not Border Leicester. Ewe lambs took 9 days longer (P < 0.05) to erupt their first permanent incisor compared with wether lambs.

Reproductive performance of ewe lambs: genetic correlation with weaning weight and subsequent reproductive performance

1976 ◽  
Vol 16 (80) ◽  
pp. 321 ◽  
Author(s):  
R Barlow ◽  
CJ Hodges
Keyword(s):  
Genetic Correlation ◽  
Reproductive Performance ◽  
Agricultural Research ◽  
Reproductive Rate ◽  
Research Station ◽  
Weaning Weight ◽  
Net Reproductive Rate ◽  
Ewe Lambs ◽  
Ewe Lamb ◽  
Selection For

The reproductive performance of Merino ewe lambs was examined in flocks with different selection histories for growth to weaning and net reproductive rate. These ewes were drawn from selection flocks maintained at the Agricultural Research Station, Trangie. There was evidence of a positive genetic correlation between weaning weight and reproductive performance of ewe lambs. Selection for weaning weight had a significant effect on the percentage of ewes lambing (P < 0.05). This appeared to be a function of a higher level of fertility (P <0.05) and a higher proportion of ewes mating (n.s.). The proportion of ewes apparently in oestrus during a 39 day teasing period, prior to joining, was significantly influenced by selection for weaning weight (P < 0.05). Simultaneous selection for increased net reproductive rate, weaning weight and clean fleece weight did not result in higher ewe lamb performance than that achieved by selection for increased weaning weight alone. No conclusion could be drawn from these data about the correlation between net reproductive rate and reproductive performance of ewe lambs.

Selection for weaning weight in Merino sheep. 2. Correlated responses in other production characters

1965 ◽  
Vol 5 (19) ◽  
pp. 361 ◽  
Author(s):  
WA Pattie
Keyword(s):  
Milk Protein ◽  
Survival Rates ◽  
Genetic Correlations ◽  
Negative Relationship ◽  
Weaning Weight ◽  
Merino Sheep ◽  
Selection For ◽  
The Difference ◽  
Fleece Weight ◽  
Lamb Growth

The heritabilities of seven production characters of Merino Sheep and their phenotypic and genetic correlations with corrected weaning weight have been calculated using half-sib and dam-daughter correlations. Realized genetic correlations calculated from responses in Weight Plus and Weight Minus selection flocks, which showed broad agreement with these correlations, were : 17-month body weight, 0.72 ; yield, 0.22 ; clean fleece weight, 0.24 ; and staple length, 0.17. There was zero relationship with greasy fleece weight and crimps per inch, and a large negative relationship between folds and high weaning weight. There were strong phenotypic correlations between lamb growth and milk production through the total weight of milk protein produced. The lamb's genotype was the most important contributor to the difference in weaning weight between the flocks. There were no differences in reproductive performance or survival rates between the flocks but twice as many twin rams and 20 per cent more twin ewes were mated in the Weight Minus flock over the selection period.

scholarly journals EFFECT OF SUPPLEMENTING DIFFERENT LEVELS OF CONJUGATED LINOLEIC ACID (CLA) TO THE DIET ON PRODUCTIVE PERFORMANCE OF BROILER CHICKEN

2017 ◽  
Vol 48 (4) ◽  
Author(s):  
Al-Bandr & Qasim
Keyword(s):  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Broiler Chicken ◽  
Agricultural Research ◽  
Control Diet ◽  
Feed Consumption ◽  
Control Treatment ◽  
Research Station ◽  
Productive Performance ◽  
Different Levels

This study was carried out at Poultry Research Station, State Board of Agricultural Research, Ministry of Agriculture for the period from 27 September 2014 to 9 November 2014 to evaluate the Supplementation of different levels of Conjugated Linoleic Acid (CLA) on productive performance of broiler. Four hundred eighty chicks (Ross-308),one day old were randomly distributed to four dietary treatments for 42 days of age with 3 replicates/vtreatment (40 bird/replicate). Experimental treatments were as follow; T1 (Control diet) without supplement, while the treatment T2,T3 and T4  were Supplemented with 1, 1.5, 2 g CLA /kg diet  respectively. The results showed significant (P ≤ 0.05) increased in mean of body weight, weight gain, average feed consumption and the feed conversion ratio, for the birds of treatments T3 and T4 in comparison with control treatment (T1). A     significant (P ≤ 0.05) improvement was found in dressing percentage of treatments T3 and T4  in comparison with control treatment, whilst the breast percentage was significantly higher in all treatments which supplemented CLA than T1 treatment. The liver percentage weight has significantly (P ≤ 0.05) increased whereas the abdominal fat percentage has significantly (P ≤ 0.05) decreased in treatment T4 in comparison with control treatment. It is concluded that CLA supplementation at levels 1.5 and 2 g/kg diet of broiler chicken has improved productive performance.

scholarly journals Pasture growth on dairy farms in the Golden Bay and West Coast of the South Island

1998 ◽  
pp. 9-14
Author(s):  
K.L. Davis ◽  
N.A. Thomson ◽  
N.R. Mclean ◽  
D.A. Mccallum ◽  
R.J. Hainsworth ◽  
...  
Keyword(s):  
West Coast ◽  
Difference Method ◽  
Agricultural Research ◽  
Production Model ◽  
Research Station ◽  
Stocking Rate ◽  
The South ◽  
Financial Return ◽  
Pasture Production ◽  
The Difference

Pasture growth was monitored on 22 farms covering Golden Bay, Nelson, Murchison and West Coast districts during 1994 to 1997. Pasture growth was measured monthly from grazed pasture using the rising plate meter (RPM) and the difference method. Pasture growth from the South Island sites were compared with growth at the WestpacTrust Agricultural Research Station (WTARS) in South Taranaki, measured by the more traditional trim method, and the difference method as used in the South Island study. The pasture growth recorded was then used by the dairy farm production model UDDER to predict the planned start of calving (PSC), stocking rate and milksolids (MS) production at maximum net financial return for seven districts. At WTARS the average pasture production recorded by the difference method was 16.3 t DM/ ha and by the trim method, 12.9 t DM/ha, the greatest difference between the two methods occurring in late spring/early summer. Pasture production on the south Island sites varied from 9.6 (Taramakau) to 16.1 (Grey Valley) t DM/ha. The major factor identified as influencing pasture growth, in an environment where rainfall for 91% of the sites exceeded 2000 mm, was number of frosts. A multiple regression combining pasture production climatic and soil nutrient variables identified number of frosts and Olsen P as the major factors influencing pasture production (R2 = 0.25). The use of the growth from seven districts by UDDER showed a marked variation in management practices and MS output. PSC varied from the first 10 days in August (Takaka, Nelson, Westport) to the last 10 days in August (Murchison). Stocking rates ranged from 2.0 cows/ha at Motueka to 3.3 cows/ha on an irrigated farm in the Nelson district. MS production/ cow differed little among districts and MS production/ha reflected stocking rate, ranging from 650 kg/ha for Motueka to 1150 kg/ha for Nelson. The main factor driving stocking rate and PSC was winter pasture production. Keywords: climate, dairy production modelling, pasture production, soil fertility

The importance of close hocks in Merino breeding

1966 ◽  
Vol 6 (21) ◽  
pp. 134
Author(s):  
RB Dun ◽  
BA Hamilton
Keyword(s):  
Agricultural Research ◽  
Research Station ◽  
Body Measurements ◽  
Phenotypic Correlations ◽  
Agricultural Research Station ◽  
Fleece Weight

Ewes born between 1956 and 1959 in a number of Merino selection flocks maintained at Trangie Agricultural Research Station were scored for distance between the hocks : 1 wide to 6 close. The heritability of hock score was high (0.49 � 0.10). The phenotypic correlations between hock score and fleece and body measurements were all small although the following were significant and positive : with greasy fleece weight, 0.11 ; with clean fleece weight, 0.06 ; with fold score, 0.09. Hock score had no influence on the total number of lambs weaned per ewe-lifetime. Ewes with close hocks (scores 5 and 6) did not lag in the rear third of a travelling flock relative to ewes with score 4 or score 1 hocks.

Hybrid vigour and lamb production. 2. Effects on survival and growth of first-cross lambs, and on wool and body measurements of hogget ewes

1978 ◽  
Vol 18 (95) ◽  
pp. 753 ◽  
Author(s):  
BJ McGuirk ◽  
ME Bourke ◽  
JM Manwaring
Keyword(s):  
Agricultural Research ◽  
Fibre Diameter ◽  
Fibre Length ◽  
Research Station ◽  
Hybrid Vigour ◽  
Body Measurements ◽  
South Wales ◽  
Survival And Growth ◽  
Lamb Survival ◽  
Fleece Weight

In an experiment at Cowra Agricultural Research Station, New South Wales, five drops of Border Leicester (BB), Merino (MM), Border Leicester x Merino (BM) and Merino x Border Leicester (MB) lambs have been compared to estimate hybrid vigour effects on lamb survival and growth, and on the wool and body measurements of ewe hoggets. Hybrid vigour has been estimated as the percentage superiority of the crossbreds 1/2(MB + BM) over the average of the purebred 1/2(BB + MM) flocks. Hybrid vigour was observed for lamb survival, with the crossbreds superior by 10 per cent in lambs weaned per lamb born (P < 0.05). The crossbred lambs were also heavier at birth (4 per cent) and weaning (6 per cent) and crossbred wether lambs were 11 per cent heavier at slaughter (all P < 0.05). The crossbred ewes were significantly superior to the average of the purebred flocks in both greasy (8 per cent) and clean fleece weight (12 per cent), liveweight (12 per cent) and chest depth (5 per cent) (all P < 0.05). There was no evidence that the crossbreds were superior in any component of wool production per unit area of the skin ; fibre length, fibre diameter or follicle density. Other evidence from this experiment indicates that the breeds and crosses differ in their susceptibility to pneumonia and that there may be heterosis for resistance. This situation could give rise to heterosis for production characters and the heterosis estimates obtained may only be applicable to first-cross flocks derived from Border Leicester studs which are susceptible to pneumonia. Lamb survival to weaning was higher for purebred Merinos (88 per cent) than for purebred Border Leicesters (73 per cent, P < 0.05). The Border Leicester lambs were heavier at all ages and in all years, although the magnitude of their superiority varied significantly between years (P < 0.05). This breed x year interaction was also significant for clean fleeca weight, but the average production of the two groups was similar over the five years. Variation, measured as the coefficient of variation, was generally lower within the crossbred flocks for those characters for which hybrid vigour effects were observed, but these differences were not statistically significant.

scholarly journals EFFECT OF ENZYME SUPPLEMENTING AND SOAKING TO THE DIETS OF THE LAYING HENS CONTAINING CORN AND WHAET ON PRODUCTIVE PERFORMANCE

2017 ◽  
Vol 48 (2) ◽  
Author(s):  
Al Rubaee & et al.
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Agricultural Research ◽  
Conversion Ratio ◽  
Metabolic Energy ◽  
Control Group ◽  
Egg Mass ◽  
Research Station ◽  
Productive Performance ◽  
Feed Conversion

This study was conducted at Poultry Research Station Animal–State Board of Agricultural Research/ Ministry of Agricultural, which included two experiments to study the effect of enzyme supplementing and soaking to the diets of the laying hens containing corn and wheat on productive performance. Three hundred Brown-egg hens (ISA Brown) 40 weeks-old were used in this experiment after introductory period for two weeks. Layer hens distributed randomly to ten treatments with 2 replicates (15 hens per replicate); And fed on diets equal protein and metabolic energy according to the age periods in ISA guide. Treatments were as follows: Treatment 1: Control group (100 % corn).Treatment 2: 100% corn with soaking. Treatment 3 : 100% corn with enzymes. Treatment 4:100% corn with soaking and enzymes. Treatment 5: 33% corn replacement wheat with soaking. Treatment 6 : 33% corn replacement wheat and with enzymes. Treatment 7 : 33% corn replacement wheat with soaking and enzymes. Treatment 8: 66% corn replacement wheat  with soaking. Treatment 9: 66% corn replacement wheat with enzymes. Treatment 10 :66% corn replacement wheat with soaking and enzymes. The results showed a significant differences between treatments in egg production (HD%), egg weight, egg mass and feed conversion ratio. Supplementary enzyme with soaking indicate a  significant increase in productive performance. 

The effect of frequency and time of shearing on the reproduction and wool growth of Bungaree South Australian Merino ewes

1966 ◽  
Vol 6 (22) ◽  
pp. 305 ◽  
Author(s):  
BJ McGuirk ◽  
JR Paynter ◽  
RB Dun
Keyword(s):  
Agricultural Research ◽  
Dual Group ◽  
Research Station ◽  
Wool Production ◽  
The Third ◽  
Agricultural Research Station ◽  
Wool Growth ◽  
Dual Groups ◽  
Fleece Weight ◽  
Australian Merino

Two hundred and seventy-five Bungaree South Australian Merino ewes were divided into three groups after shearing in June 1963 at Trangie Agricultural Research Station. One group was shorn in December 1963 and 1964 (December group), another in June 1964 (June group), while the third group was shorn at all three of these times (Dual group). The ewes were joined with rams on February 25, 1964. Twenty-nine days later 88 per cent of the ewes shorn in December (December and Dual groups) had exhibited oestrus compared with 72 per cent in the unshorn (June) group (P<0.05). Shearing in December also increased the percentage of wet ewes. Pre-lambing shearing did not influence lamb losses. Shearing twice a year (Dual group) increased the wool production of dry ewes compared with shearing once in the same 12 month period. The increases in clean fleece weight when the additional shearing in the Dual group was in December and June were 15 and 10 per cent respectively. However, Dual shearing did not increase fleece weights over the December group when the ewes were pregnant at the time of the additional shearing in June. Dual shearing improved wool colour and reduced fleece rot, but the wool of the Dual group had fewer crimps per inch and poorer handle than the June shorn wool (P<0.05). Estimated wool returns favoured the groups shorn once per year (P<0.05).

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