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QUESTIONS
& ANSWERS
Day 2 Genetic improvements
and current status
Dr. Matthias SCHMUTZ Björn ANDERSSON
Director of Research Deputy Director of R&D
& Development
Thank you for your
active participation!
Day 2 Genetic improvements and current status
In Norway we use LSL Classic and the last year we have seen that
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What is the plumage score for LSL classic at age 67 weeks
the birds overall have a lower body weight, lower feed intake and
lower eggweight than 3-4 years ago. Is this done on purpose in The individuall plumage condition of a flocks depends on many
the genetics, or can this be because we have done something different factors. We see flocks with full feather at the age of 67
different in management or feeding? weeks as well as flocks with bad plumage condition. Genetics only
can contribute in the multifactorial challenge of feather loss to
Genetically the body weight and egg weight is not modified in the
prepare the birds to handle the conditions of the field.
LSL Classic breed. Also the feed intake remain more or less on the
same level while feed efficiency was improved. The egg weight curve
is getting a bit more flat, this medans in the end of the production
What is the average clutch length between 28 and 43 weeks of
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cycle not as many excessive large eggs, but the early egg size did
age in today’s LSL genetics?
not change. Besides nutrion also the rearing managemnt can
have hugh impact on the body weight and egg size, therefore we In the pureline hens, where we can observe the cluth lengh, in this
recomand to reach the body weight targets for pullets. age is usually around 30-40 eggs in one clutch and then one day no
Dr. egg, which is a rate of lay around 97-98%. But there is a substantial
variation between individual hens, some hens have a clutch lenght
Matthias Dear Dr Matthias thank you very much for a very interesting
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of below 10 eggs, some individuals have a clutch lenght of over 200
SCHMUTZ presentation. My question: Is there any performance data eggs without one day off.
recorded from Middle east where the outside temperatures reach
Director of Research
almost 50C to be used in the selection process? Dr Suheel Ahmed
& Development
Indeed we consider test under high temperature conditions. Cross
line birds are tested in Spain and Colombia were we oft have very
high temperature and in some facilities even open houses with a
high light intensity.
I would like to ask about cannibalism chicks like to peck oneself
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or others. can we select this breeding trait
Selection for behaviour traits is not easy as the heritability of this
Björn traits are often low. We are collecting informations about mortality
ANDERSSON reasons to identfy those birds/ familiy who are less susceptible for
behavioral disorders. In our feather score or toe pecking score, we
Deputy Director can not 100% observe if the birds peck themself or other cagemates
of R&D do the pecking. But we can see if one family is more susceptible to
challenge conditions and respond more or less with pecking - self
or from others.
Day 2 Genetic improvements and current status
Why most of Lohman Brown Classic laying hen have much more As a continuation of my other question, I am curious what specific
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white feather cover than several years ago that had complete behavior metrics fall under your data collection ‘adaptability’ for
covered with dark brown feather? cage free layers
The selection for performance traits leads to a lighter plumage Birds in cage free systems need in contrast to the birds in cage
color in brown hens. We consider the plumage color in our selection system a better adaptability to the system as they don’t have
decision to breed against this trend. So we try to avoid that the hens feed, water and the nest in one place. At the same time they have
are getting more pale feather colour. But the more pale families in much more space to use. This requiers a better ability to move in
feather colour are the best performing families. the system and find the appropriate area to rest, eat or lay their
egg. Therefore we collect individual data on the activity and nesting
beahvior of the birds.
Is there any effect in performance when we mix lsl white and lsl
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brown in Rearig period
Dr. Mixing different colored birds in rearing need a equal presence
Matthias of both groups. Otherwise it can lead to a higher mortality and
reduced body weight in one color group. Never make a group where
SCHMUTZ less white birds than brown birds. Then the white birds will always
Director of Research suffer. It is always a risc that the white and brown will separate in the
& Development house and then the white wirds dont get enough feed and water.
Are you tracking mortality rates that can be specifically associated
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with post-oviposition ‘clustering’ or ‘smothering’ events in the litter
area of the barn? Also, what housing density is ‘adaptability’ type
data collection on Parent Stock?”
In the pureline and Grandparent stock we do not observe smothering
events. Challenge tests for high stocking density is done at 15 bird
per m2 accessible space.
Björn
ANDERSSON
Deputy Director
of R&D
Day 2 Genetic improvements and current status
Is there equal focus on selecting or interior egg quality What is the role of genetic improvement in quality of chick?
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characteristics, ‘haugh units’ as for breaking strength?
When considering extended length lay cycles we need high Chick quality is an important trait for PS customers. We test our pure
measurements for haugh units to maintained, as much as we line birds for hatchability and chick quality to increase the amount
need high breaking strenth of salable chicks per parent.
Breeding for persistency is not only about laying performance.
Especially the egg quality parameters at a late stage are important
How can lighting duration affect egg strength?
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to maintain a high share of salable eggs. This includes egg breaking
strenght and haugh units as well.
We are not aware, that the light hours may have an effect on shell
strenght, as long as a correct day/night schedule is granted.
What are the main genetic improvements do you expect in
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Dr. coming years? What is the data source of performance table
Matthias presented in the breed management guide?
SCHMUTZ One of the main improvements will be the prolong laying cycle -
Director of Research persistency! At the same time the flock should maintain on a good
& Development liveabilty and a good plumage cover. The performance data in the
management guides are based an the estimated improvement
from selection and the feedback we get from the field how the birds
perform under different circumstances.
Regarding to the rate of growing from week 17 to week 35, What
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do you recomend for free range? Classic Brown or Lite? When the
size of egg is not so important.
We always recomand to achieve the body weight targets for rearing
Björn of the management guide. Hens with a good body weight prior
ANDERSSON laying always performe better and are better prepared for eventual
challenges. Especially in free range it is so important to have the
Deputy Director correct body weight development after start of lay, but much more
of R&D difficult to achieve it. In markets were the egg price is independent
from egg size, the Lohmann Brown Light bird is always the better
choice due to a higher amout of eggs per hen housed.Day 2 Genetic improvements and current status
Good day! Please answer why the Lohmann Brown Light bird is Light feathers are related to birds that will be less productive, is this
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not represented in Russia? Judging by your brochures, this bird’s correct or not? It is normal to find lots with a high number of hens
performance is higher. with plumage, in recent years it has increased
RUS Добрый день! Ответьте пожалуйста, почему в России не
Las plumas claras se relacionan con aves que serán menos
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представлена птица Ломанн Браун Лайт? Судя по вашим
productivas , es así o no? Es normal encontrar lotes con una
проспектам, показатели продуктивности у этой птицы выше.
cantidad alta de gallinas con plumaje, en los ultimos años se ha
incrementado
The individual commercial product availabilty depends on the local
distributer for the region. In aspects of egg number per hen housed,
We usually see a better performance in the birds with paler
the Lohmann Brown light bird have the highest production amog
plumage color. So it is the opposite as you say, the pale families are
the brow Lohmann layers.
performing better. This is the reason, why the feather colour has a
Dr. Наличие отдельных коммерческих продуктов зависит от спроса tendency to become more pale, but we try to avoid this tendency by
Matthias в регионе. Данный кросс стоит дороже, чем Ломанн Браун selection for a mor dark plumage colour.
Классик, а в России покупатель пока не готов платить больше.
SCHMUTZ С точки зрения количества яиц на одну несушку птица Lohmann Generalmente vemos mejores resultados en las aves con plumaje
Director of Research Brown Light (легкая) имеет наивысшую продуктивность среди más blancas, lo que es el contrario de lo que preguntaste. Aves con
& Development несушек Lohmann. plumas más blancas son más productivas. Esa es la razón por lo
que hay una tendencia de tener aves con más plumas blancas, pero
evitamos esa tendencia a través de selección para una plumaje
más oscura.
Björn
ANDERSSON
Deputy Director
of R&DDay 2 Genetic improvements and current status
Dear: Have you worked in commercial lines with the same egg Understood that paler birds are less productive. As for the color of
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size but with less feed consumption? the shell, is it related to the color of the bird?
Estimados: ¿Se ha trabajado en lineas comerciales con el mismo Entendido que las aves más páldas son menos productivas. En
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tamaño de huevo pero con menor consumo de alimento? cuanto al color de la cáscara, hay relación con el color del ave?
The feed consumption depents mainly on the energy content of the We usually see a better performance in the birds with paler plumage
feed. The egg size is mainly driven by fatty accids and aminoaccids. color. Shell colour is not all related to feather color. The best example
If you link both traits you always have to consider the nutient for this is the Brown PS female, she is white feathered and lay darker
ingredients. In general feed intake and egg size are high correlated, shell colour than the Rhode Island male line breeds.
so a high egg size bird need always more feed intake than a small
egg size bird. Generalmente vemos mejores resultados en las aves con plumaje
más blancas. El color de la cáscara no está relacconado al color de
Dr. El consumo de alimento depende principalmente de los niveles las plumas. El mejor ejemplo para eso es la hembra Reproductora
Matthias de energía en el alimento. El tamaño del huevo es principalmente Lohmann Brown, la cual es completamente blanca y pone huevos
marrones más oscuros que las líneas machos de Rhode Island.
SCHMUTZ dependiente de la grasa y aminoácidos. Uniendo esos dos,
tendremos siempre que considerar los ingredientes. En general
Director of Research el consumo de alimento y el tamaño del huevo están altamente
& Development relacionados, así que un ave que produzca buen tamaño de huevo Knowing that the persistence will be longer, it will be possible to
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necesitará más consumo de alimento que una ave que produzca improve the quality of the shell in genetics, since the nutrition is
menor tamaño de huevo. very close to the limit.
Sabiendo que las persistencias seran mas largas, se podra
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mejorar calidad de cascaron en genetica , ya que la nutricion esta
muy cerca del limite.gracias
Breeding for persistency always consider the egg breaking strength
to increase the amount of saleable eggs. But nutrition is still a key
factor in a prolonged laying cycle as you ahve to provide the bird a
Björn fitted calcium and vitamine source.
ANDERSSON
Thank you for your
La selección para persistencia siempre considera la resistencia
Deputy Director de cáscara para aumentar la cantidad de huevos vendibles. Sin
of R&D embargo, la nutrición es un factor clave en ciclos largos, una vez que
active participation! debemos suministrar a las aves fuentes y cantidades adecuadas de
calcio y vitaminas.You can also read
