Báo cáo sinh học: "Genetic parameters for lactation traits of milking ewes: protein content and composition, fat, somatic cells and individual laboratory cheese yield" ppt
... 10.1051/gse:2002024
Original article
Genetic parameters for lactation traits
of milking ewes: protein content
and composition, fat, somatic cells
and individual laboratory cheese yield
Med. Houcine O
THMANE
, ... factors and the genetic parameters for
total milk traits (fat content, protei n content, casein content, serum protein content, lac...
...
solid
content
was
lower.
Within-breed,
the
genetic
standard
deviation
was
1.8-2
fold
larger
for
fat
content
than
for
protein
content.
The
heritability
of
fat
and
protein ...
yields
and
on
contents.
Within-breed
of sire
genetic
parameters
Genetic
variability
of
the
traits.
The
estimates
of
heritability,
genetic
and
phenotypic
standard
d...
... BV of the individual itself (DBV = A
D, i
); associa-
tive BV of the gr oup members (
SBV =
−
Σ
n
Sj
A
1
,
)anda
combination of the direct BV of the individual itself
and the associative BV of ... combi-
nation of the direct breeding value and the associative
breed ing values of the group members (DSBV) . Compar-
ing genetic parameters of 2STEP and LAM is not
strai...
... shape of lactation curves [16]; A
m
was
the random a dditive genetic effect of the individual m
(1,603 levels); PE
m
was the ge neral random permanent
environmental effect of ewe m across lactations ... mean SCC was 403 (× 10
3
cells/ mL) for the
whole data , 253 for the bacteria ne gative, and 1,082 for
the bacteria positive. Although ranges of SCC for unin-
fected an...
... Nouzilly) for the use of his
software dealing with a bivariate analysis of binary traits and continuous traits.
The technicians of the Inra farm, La Sapinière, are gratefully acknowledged
for all ... estimation of genetic
parameters (heritability and genetic correlations).
At the same time, the populations were observed for economic traits: body
growth and wool tra...
... posterior means for the proportion of variance of the PE-effect
were 0.06 and 0.16 for LSN and 0.05 and 0.10 for LSI in AM and SM respec-
tively. For the YF-effects, the means of the posterior ... posterior mean of the heritabil-
ity of litter size was 0.10 and 0.08 for LSN and 0.11 and 0.10 for LSI in AM
and SM respectively. The PE-effect accounted for ab...
...
vector
of
underlying
means
P:
vector
of
parity
of
cow
effects
ul:
vector
of
sire
of
fetus
effects
U2
:
vector
of
sire
of
cow
effects
U3
:
vector
of
cow
within
sire
of
cow ...
and
0.02
for
direct
and
fetal
effects,
respectively,
with
a
correlation
between
both
effects
of
0.36.
Transmitting
abilities
of
bulls
were
expressed
on
the...
...
analysed :
milk
yield,
fat
and
protein
contents,
fat
and
protein
yields,
lactation
length
(L)
and
ratio
of
protein
to
fat
content.
Useful
content
and
yield
were
also
analysed. ...
genetic
variability
of
protein
content
was
about
half
that
of
fat
content.
The.genetic
antagonism
with
milk
yield
was
stronger
for
protein
content
t...
... methods and 3 replicates by method = 18 × 3 × 3,
and one level for founder population), u the vector of unknown parameters for
the direct animal genetic effect, c the vector of unknown parameters for ... (ν = 4andS= 0.45) distributions were assigned
for variance parameters σ
2
u
, σ
2
u
∗
and σ
2
c
, σ
2
c
∗
, and a uniform prior bounded be-
tween −1 and 1 was assig...
... chronological year of ring formation.
The medium to high broad-sense heritabilities for grain
angle in individual rings agreed with estimates obtained for
Sitka spruce [11] and other conifers (for review, ... slope of the regression of
grain angle on ring number from pith and the grain angle of
Genetic parameters for spiral grain 555
Figure 3. Mean grain angle per annua...