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Genetics > economic traits of cattle and buffalo > Flashcards

economic traits of cattle and buffalo Flashcards

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Biology 101 flashcards
1
Q

purpose of record keeping

A
  • *know the pedigree and history
  • *compare herd performance
  • **breed comparison
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2
Q

use of record keeping

A
  • **animal pricing

* **breeding value estimation

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3
Q

types of records are

A
  • **pedigree registers
  • **birth register
  • ***growth register
  • **daily treatment register
  • **livestock register
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4
Q

types of records 2

A

daily milking register
milk feeding register
feed and fodder register
**sale /mortality register

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5
Q

pedigree register is for

A
  • **info about breed /genetic number
  • **dam and sire number
  • **grand dam and grand sire number
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6
Q

birth register is for

A

***dob
sire and dam number
birth weight
calf number and sex

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7
Q

daily treatment register is for

A

number of animals which are sick

**names of disease

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8
Q

daily milking register for

A

amount of milk produced by each cow in morning and evening

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9
Q

standardisation of records

A

***some records are excluded before statistical and genetic analysis
**incomplete records
milk records
abnormal calving milk records

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10
Q

two types of traits

A
  • ***directly measurable/observable traits

* ***generated traits

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11
Q

directly measurable traits

A

**body weight
**birth weight
**sex
body measurements
**litter size
***egg production

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12
Q

generated traits

A

most are economic traits

**generated from pedigree registers

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13
Q

economic trait**growth rate??

A

***percent change of body measurements within a specific time

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14
Q

buffallo growth rate

A

**1 to 1.3 kg/day

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15
Q

cattle growth rate

A

500-600g/day

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16
Q

age at sexual maturity

A

DATE of birth to date of first heat

approx 20 months

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17
Q

age at first calving

A

dob to date of first calving
cattle——32-34 months
afc in buffalo—-36-40months

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18
Q

post partum breeding interval

A

from calving to date of first heat

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19
Q

ppb in cattle

A

45 days

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20
Q

ppb in buffalo

A

63 days

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21
Q

service period

A

date of calving to date of successsful AI

22
Q

service period in cattles

A

SP :145-150 days

23
Q

service period in buffaloesgestation peri

A

120 to 150 days

24
Q

gestation period

A

date of conception to date of calving

25
Q

gestation period cattle

A

280-185 days

26
Q

gestation period in buffalo

A

310-330 days

27
Q

calving intervalcal

A

interval between two calvings

28
Q

calving interval of cow

A

400-420 days

29
Q

calving interval of buffalo

A

420-450 days

30
Q

fertility rate

for bullsfertility

A

number of conceptions/number of insemnations

*100

31
Q

fertility index for cowsbreeding

A

1/number of inseminations

*100

32
Q

breeding efficiency is calculated by

A

tomars formula
wilcox formula
refer

33
Q

days open

A

percentage of total service period to herd life

34
Q

herd life?

A

difference in days between days of first calving to day of disposal

35
Q

productive life?

A

date of first calving to date of last calving

36
Q

lactation length

A

date of dry to date of dry

37
Q

lactation length cattlelactation length buffalo

A

320 days

38
Q

lactation length buffallodry period

A

340-350 days

39
Q

dry period

A

date of dry to date of next calving

40
Q

dry period of cow

A

60 to 65 days

41
Q

mortality rate

A
42
Q

replacement rate

A

percentage of female calves reached AFC
/total female calves born
*100

43
Q

selective value

A

number of female adults reaching milking in a herd

44
Q

days to attain peak yield

A

date of calving to day to attain peak yield

45
Q

lactation curve

A

graphical rep of milk yield against time

46
Q

stages if lactation curve

A

acending
persistent
descending

47
Q

ascending phase of lactation curve

A

initial milk yield +days require to acquire peak yield

48
Q

descending milk yield

A

milk yield from date of peak yield to date of drying

49
Q

fat percentage of cow

A

3-5 %
BUFFALO
7-8%

50
Q

DRESSING PERCENTAGE in buffaloes

A

40-45%

51
Q

DRESSING PERCENTAGE in buffaloes

A

40-45%

52
Q

birth weight of buffalo

A

27-33 kg

Genetics (7 decks)

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