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ANIMAL breeding > SELECTION CRITERIA-progeny selection > Flashcards

SELECTION CRITERIA-progeny selection Flashcards

0
Q

what does Simple Daughter Average Index not take into account?

A

production level of mates of bull(i.e. dams of daughters)

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1
Q

_______ purposed simple daughter average index

A

edwards

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2
Q

equiparent index is also known as ________ or _______or ________index

A

intermediate
yapp’s
mount hope

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3
Q

__________ purposed Equi-parent or Intermediate index

A

Hansson

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4
Q

which index is simplest index?

A

Simple Daughter Average Index

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5
Q

Simple Daughter Average Index FORMULA

A

I=D

D is average if all daughters of sire under test

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6
Q

Equi-parent/Intermediate index FORMULA

A

I=2D-M
(D is average of all Daughters of sire under test)
(M is average of Mates of sire under test)

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7
Q

Corrected Daughter Average Index was purposed by _________

A

Krishan

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8
Q

__________index is superior than SDAI & equiparent/intermediate index

A

Corrected Daughter Average index

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9
Q

Corrected Daughter Average index FORMULA

A

I=D-b(M-H)

(D is average of all Daughters of sire under test)
(b=0.5h2 , intra-sire regression of daughters on dam)
(M is average of Mates of sire under test)
(H=herd average)

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10
Q

contemporary daughter average index is purposed by __________

A

Sunderasan

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11
Q

basis of contemporary daughter average index

A

records of daughter of sire are compared with the daughters of all other sires in same herd calved in same month or +- 2 months

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12
Q

corrected contemporary daughter average index was purposed by ____________

A

suderasan

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13
Q

corrected contemporary daughter average index is also known as ____________ index

A

Dairy Search

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14
Q

the sire constants are obtained by _________ techniques

A

least square

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15
Q

maximum likelihood method was improved by a method known as ________________

A

restricted maximum likelihood(REML)

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16
Q

restricted maximum likelihood(REML) is also known as ____________

A

marginal maximum likelihood

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17
Q

expand term BLUP

A

Best Linear Unbiased Prediction method

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18
Q

Best Linear Unbiased Prediction method was developed by __________

A

Henderson

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19
Q

which method is more powerful than all the conventional selection index methods?

A

Best Linear Unbiased Prediction method(BLUP)

20
Q

name any two methods used for evaluation of sires used in more than one herd?

A
  1. Stable-Mate Daughter Average index

2. Corrected Stable-Mate Daughter Average index

21
Q

define “progeny testing”

A

th selection criteria for evaluating an individual based on his progeny performance

22
Q

progeny testing is also known as ________

A

progeny selection

23
Q

breeding value of the parent is ______ the _____________ of the progenies from the population mean

A

twice the mean deviation

24
Q

name the factors which cause great deviation from true BV of a parent?how can the effect of these 2 factors balanced out?

A
  1. change at segregation
  2. enviromental factors

estimating BV based on many progenies

25
Q

name the 3 types of traits for which INDIVIDUAL SELECTION is not possible

A
  1. T of low heritiblity
  2. sex limited T
  3. T expressed after death of individual
26
Q

pedigree selection is effective for T of _____ heritiblity

A

HIGH

27
Q

how many males should be PROGENY TESTED for each required progeny tested sire?

A

4-5 males

28
Q

to run PT program effectively, it is required to get ______ inseminations or ____ pregnancies from each bull to get about _____ daughters

A

100
50
10

29
Q

how is BV of bull based on its progeny performance estimated?

A

multiplying the regression of BV of parent on the phenotypic perfomance of its progeny with the selection differential of progeny of that sire from mean of contemporaries

30
Q

formula of BV based on PT

A

b=rnh2/[1+(n-1)t]

31
Q

what is “acuracy of PT”

A

correlation of genotype of parent with average phenotype of its progeny

32
Q

acuracy of selection based on one progeny is _h

A

0.5

33
Q

acuracy of selection based on one progeny is same as that based on ________ or ________

A

one parent

one full sib

34
Q

acuracy of PT ________ with increase in number of progeny

A

increases

35
Q

the acurracy of PT with ______ progeny gives as high acurracy as that of INDIVIDUAL SELECTION

A

5

36
Q

the acurracy of PT will be higher than the acurracy of INDIVIDUAL SELECTION if the no. of progeny will exceed ______

A

5

37
Q

of individual selection and PT, which is more accurate for traits of lower heritability?

A

PROGENY TESTING is is more acurate

38
Q

PT is _______ effective as selection based on HALF SIB families

A

2 times

39
Q

PT is _______ effective as selection based on FAMILY SIB families

A

1.4 times

40
Q

presence of ___ effects reduces accuracy of PT

A

C

41
Q

what is principal advantage of PT

A

increased selection intensity

42
Q

PT is ______ form of family selection

A

modified

43
Q

_________ is modified form of family selection

A

PROGENY TESTING

44
Q

what is “sire index”

A

it is the index of genetic worth of sire

45
Q

what is C(s)

A

enviromentally determined correlation which exists between daughters of a bull

46
Q

C(s) for seasonal differences

A

C(s)=t=0.25*heritability

47
Q

C(s) for cows belonging to different herds

A

C(s)=heritability=4t

ANIMAL breeding (11 decks)

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