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¡@¡@°g±m½Þ¶È¿ï¯d¦³´Ä¶Â±ø¯¾ªº²Ä¤@¥N¥J½Þ¬°¿ï¨|ºØ½Þ¡]¹Ï1¡^¡A¦]¦¹¦bÅé¦â¤£§e±ø¯¾©Î¤£¥þ¶Â©Î¤£¥þ´Äªº¥J½Þ§¡ÂkÃþ¬°¦³ÂøÂIªº¥J½Þ¡C¦U¥@¥N¥J½ÞÅé¦â¤À¥¬ÀW²v¦C©óªí2¡CÂø¥æ¤@¥NªºDM©ÎMD½Þ§¡¥H´Ä¶Â±ø¯¾©~¦h¡A¹F65% ¥ª¥k¡CÂø¥æ¤G¥N­Y¬°²Ä¤@²£¦¸©M²Ä¤G²£¦¸ªÌ¡A«h¤´¥H´Ä¶Â±ø¯¾©~¦h¡Aªì¨BÅã¥Ü§ù¬¥§J½ÞºØ¬õ´ÄÅé¦â¹ïÄõÀ¬½ÞºØ¶ÂÅé¦â¬°¦@Åã©Ê¡A¦ý¶È­­Åé°¼³¡¦ì¡C®Ú¾Ú«e¤G­Lªº¥J½ÞÅé¦â¡A¶È¿ï¯d²Ä¤@¥NºØ¤½½Þ¦³´Ä¥Õ±ø¯¾¥J½Þ«á¸ÇªÌ¡A¨Ó»P°t²Ä¤@¥NºØ¥À½Þ¡A¥Í²£²Ä¤T©M²Ä¥|­L¡A¥J½Þ¦³43.5% ¬°¥þ¶Â¡A¦Ó¶È¦³7.5% ¬°´Ä¥Õ±ø¯¾¡A·t¥Ü´Ä¥Õ±ø¯¾ªº²Õ¦X¨ü±±©óºØ¥À½Þ¦¨¤À¤§¥i¯à©Ê¸û¤j¡C¸g¹L²Ä¤G¥NºØ½Þ¿ï¯d®É¡A­n¨D¤½½Þ»Ý¨ã´Ä¥Õ±ø¯¾¡A¥À½Þ¥H´Ä¥Õ±ø¯¾¬°Àu¥ý¡A´Ä¶Â±ø¯¾¥À½Þ¦¸¤§¡A¶i¦æ²Ä¤T¥N¥J½Þ¤§¨|¦¨¡AÅé¦â¥þ¶Â¥J½Þ¶È¦û1.4%¡A¦Ó´Ä¥Õ±ø¯¾¥J½Þ¥Ñ¤W¤@¥Nªº7.5% ¼W¥[¬°25.3%¡A¦b²Ä¥|¥N¼W¥[¨ì72.8%¡C²Ä¤T¥NºØ¥À½Þ¥­§¡¨C­L²£6.00 ÀY¬¡¥J½Þ¡A²Ä¥|¥N¥J½Þ¬°´Ä¥Õ±ø¯¾Åé¦âªÌ¦³72.8%¡A¸û¤W¤@¥Nªº25.3% ¼W¥[¬Æ¦hÅã¥Ü´Ä¥Õ±ø¯¾¤wÁͯ¦X¥B¦ü¥G¬°Áô©Ê°ò¦]¡A¦Ó¦b²Ä¤»¥N¼W¥[¨ì100%¡A±À´ú´Ä¥Õ±ø¯¾¬°¤@Áô©Ê°ò¦]¡A¤£¹L³oºØ´Ä¥Õ±ø¯¾¦b¦¨¼ô«á·|²H¤Æ¡A©y¶i¦æªñ¿Ë¥S©f¿ï¨|¨Ó±´°Q¨ä°ò¦]¯Â¦X«×¡C¿ï¯d¤½½Þ5¤ëÄÖ­«¬ù27.3 kg¡A¦Ó¥À½Þ­«32.4 kg¡C¦]¦¹¡A¶i¤@¨B´î»´5¤ëÄÖÅé­«¦Ü20 kg¥H¤U¬O¤pÅ髬°g±m½Þªº¿ï©Þ¤è¦V¡C

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¹Ï1.¡@±qÄõÀ¬½Þ»P§ù¬¥§J½ÞªºÂø¥æ«á¸Ç¿ï¨|¦Ó¨Óªº°g±m½Þ¤§Åé¦âÅܤơG”ñ ¦³´Ä¶Â±ø¯¾ªºF1¥J½Þ¡A”ò ¦³´Ä¶Â±ø¯¾ªºF2¥J½Þ¡A”ó ¦³´Ä¥Õ±ø¯¾ªºF2¥J½Þ¡]«e¡^¡A”ô ¦¨ªø¤¤ªº´Ä¥Õ±ø¯¾F2¥J½Þ¡]«e¥k¡^¡A”õ ´Ä¥Õ±ø¯¾F3¥J½Þ¡A¦³5ÀY¡A”ö ¦¨ªø¤¤ªºF3´Ä¥Õ±ø¯¾¥J½Þ¡]¥ª©M«á¡^»P´Ä¶Â±ø¯¾¥J½Þ¡A”÷ ´Ä¥Õ±ø¯¾F4¥N¦PºÛ¥J½Þ¡A©M ”ø 8¶gÄÖF4¥N¦PºÛ´Ä¥Õ±ø¯¾¥J½Þ¡C

Fig. 1. Coat color of Mitsai pigs derived by crossing between Lanyu and Duroc breeds: (1) F1 piglets with black and brown stripes, (2) F2 piglets with black and brown stripes, (3) F2 piglets with white and brown stripes (the front one), (4) growing F2 pigs with white and brown stripes (the front right one), (5) F3 piglets with white and brown stripes, five pigs in the photo, (6) F3 brown-white striping pigs at eight weeks of age (left and front), (7) F4 brown-white striping piglets from the same litter, and (8) F4 brown-white striping littermates at eight weeks of age.

ªí1.¡@°g±m½ÞºØ¥À½Þ¤§Ác´Þ©Êª¬

Table 1. Reproductive traits of sows in the Mitsai line

©Êª¬

Trait

²Ä¤@¥N¥À½Þ

F1 sow

²Ä¤G¥N¥À½Þ

F2 sow

²Ä¤T¥N¥À½Þ

F3 sow

²£¦¸

Parity

3¡ã4

1¡ã2

1

¤À®Y­L¼Æ

No. of litters

17

38

19

¨C­L¥X¥Í¬¡ÀY¼Æ

No. of piglets born alive per litter

9.24±2.83

5.79±3.28

6.00±2.10

¬¡¥J½ÞÁ`ÀY¼Æ¡]¤½/¥À¡^

Live piglets in total (Male/Female)

157(83/74)

220(125/95)

114(54/60)

8¶gÄÖÂ÷¨Å­L¼Æ

No. of litters at 8-week weaning

15

28

19

8¶gÄÖ¨C­LÂ÷¨ÅÀY¼Æ

No. of piglets weaned per litter

6.60±2.75

5.32±2.95

5.05±2.25

Â÷¨Å¥J½Þ¨|¦¨²v¡]¢H¡^

Survival rate at weaning

71.4

91.8

84.1

¥­§¡±¼Ð·Ç°¾®t¡CMean±Standard deviation.

¤T. ¥Íªø©Ê¯à

wpe19.jpg (20882 bytes)

¡@¡@°g±m½ÞÂø¥æ¤@¥N©M¤G¥N¦Û¥X¥Í¦Ü 5 ¤ëÄÖ¡A¦b 1¡B2¡B3 ©M 8 ¶gÄÖ§¡ºÙ­«¡A¨ä¥Íªø¦±½u¦p¹Ï 2 ©Ò¥Ü¡C5 ¤ëÄÖ­«¤¶©ó 26¡ã35kg ­«¡C¦ÓÂø¥æ¤G¥N¦Ü¥|¥N«ö©Ê§O°Ï¤À¤§¥X¥Í­«¡B8 ¶gÄÖ­«©M 5 ¤ëÄÖ­«¦C©óªí 3¡C

¹Ï 2.¡@°g±m½ÞÂø¥æ¤@¥N¡]DM©ÎMD¡^©MÂø¥æ¤G¥N¤§¥ÍªøÅé­«¡C

Fig. 2. Growth weight of F1 (DM or MD) and F2 of Mitsai pigs.

ªí2. ¤£¦P¥@¥Nªº¥J½ÞÅé°¼¦³±ø¯¾¬Û¶¡Åé¦â¤§¤ñ²v

Table 2. Frequencies of piglets with coat color of longitudinal stripes at different generations

«á¸Ç¥J½ÞÅé¦âÃþ§O¤Î¨ä©Ò¦û¤ñ²v(%)

Coat color with its frequency (%)

Åé°¼¦³±ø¯¾¬Û¶¡

Åé¦â

Åé¦â

Åé¦â

¥@ ¥N

Generation

ÀY¼Æ

N

´Ä¶Â±ø¯¾

Brown- black

stripes

´Ä¥Õ±ø¯¾

Brown- white

stripes

¥þ¶Â

Solid

black

¥þ´Ä

Solid

Brown

¦³ÂøÂI

With

spots

­ì¥NFunder

¡@§ù¬¥§JºØ¡]D¡^

9

0.0

0.0

0.0

100.0

0.0

¡@Äõ À¬ ºØ¡]M¡^

7

0.0

0.0

100.0

0.0

0.0

Âø¥æ¤@¥NF1

¡]¶¯¿Ë¡Ñ»Û¿Ë¡^

¡@D¡ÑM

40

65.0

0.0

2.5

0.0

32.5

¡@M¡ÑD

35

80.0

0.0

0.0

0.0

20.0

Âø¥æ¤G¥N¡]1¡Ï2­L¡^

F2 (parity 1 and 2)

¡@DM¡ÑDM

40

45.0

12.5( 5)a

27.5

12.5

2.5

¡@MD¡ÑDM

40

40.0

5.0( 2)

32.5

7.5

15.0

¡@DM¡ÑMD

45

46.7

13.3( 6)

26.7

4.4

8.9

¡@MD¡ÑMD

57

33.3

7.0( 4)

49.2

10.5

0.0

Âø¥æ¤G¥N¡]3¡Ï4­L¡^b

F2 (parity 3 and 4)

145

31.0

7.5(11)

43.5

18.0

0.0

Âø¥æ¤T¥NF3

217

41.5

25.3(55)

1.4

31.8

0.0

Âø¥æ¥|¥NF4

114

21.1

72.8(83)

1.7

4.4

0.0

Âø¥æ¤­¥NF5

185

0.0

91.9(170)

0.0

8.1

0.0

Âø¥æ¤»¥NF6

130

0.0

100.0(130)

0.0

0.0

0.0

a¬A©·¤º¼Æ¦r¬°¨ã¦³´Ä¥Õ±ø¯¾ªºÀY¼Æ¡C

Number in parentheses was the number of pigs with white and brown stripes.

b©Ò°tºØ¤½½Þ»Ý¦b¨ä»P°t¥À½Þ©Ò¥Í²Ä1©Î2 ­L¤º¦³´Ä¥Õ±ø¯¾¬Û¶¡¥J½ÞªÌ¡C

Sows were mated by boars which they had progeny with white and brown stripes from parity 1 or 2 of sows.

ªí3. °g±m½Þ¤§¥Íªø©Êª¬

Table 3. Growth traits of Mitsai pigs

¥@ ¥N

Generation

©Ê§O

Gender

¥X¥Í­«¡Akg

Birth weight

8 ¶gÄÖ­«¡Akg

Weight at 8-week old

5 ¤ëÄÖ­«¡Akg

Weight at 5-month old

²Ä¤G¥N

¤½M

1.16±0.33(125)

10.32±3.99(90)

30.54±8.06( 2)

F2

¥ÀF

1.12±0.30( 95)

10.01±3.29(60)

33.51±6.62(11)

²Ä¤T¥N

¤½M

1.14±0.25( 25)

9.32±3.05(25)

32.50±6.76(13)

F3

¥ÀF

1.12±0.24( 60)

9.27±2.75(50)

33.47±7.64(22)

²Ä¥|¥N

¤½M

1.00±0.54( 54)

6.07±4.51(50)

27.33±6.83(14)

F4

¥ÀF

0.98±0.50( 60)

5.80±4.90(46)

32.48±8.92(28)

¥­§¡±¼Ð·Ç°¾®t¡CMean±Standard deviation.

¬A©·¤º¼Æ¦r¬°ÀY¼Æ¡CNumber in parentheses was the number of pigs.

¡@

¥|. Å髬©Êª¬

¡@¡@°g±m½Þ¦]¥u¿ï¯d¦³´Ä¥Õ±ø¯¾¬°¤½½Þ¡A¦Ó¥À½Þ«h¬°´Ä¥Õ±ø¯¾©Î´Ä¶Â±ø¯¾ªÌ¡A°£²Ä¤G¥N¦]¦³¨ä»Û¿Ë©Ò¥Íªº«e¤G­L¦P­M½Þ³Q¿ï¯d¡A¬G¶È´ú¶q2¤½11¥À¦Ü5¤ëÄÖ¡C²Ä¤G¦Ü¥|¥N¹F5¤ëÄÖªº½Þ«ö©Ê§O´ú¶q¨äÅ髬©Êª¬¡AÅé°ª¡BÅéªø¡B¦Õªø¡B¦Õ¼e¡B¯Ý²`¡B¯Ý³ò¡B«eªÏªø¡B«eªÏºÞ³ò¡B«áªÏºÞ³ò¡BÁv¼e¡B§Àªø¡B¸A¤Yªø©M¸A¤Y¼e¤§¥­§¡­È¦C©óªí4¡C

ªí4. °g±m½Þªº5¤ëÄÖÅé­«»PÅ髬

Table 4. Body weight and conformation at five months of age in Mitsai pigs

²Ä ¤G ¥N F2

²Ä ¤T ¥NF3

²Ä ¥| ¥NF4

©Êª¬

Trait

¤½

Male

¥À

Female

¤½

Male

¥À

Female

¤½

Male

¥À

Female

ÀY¼Æ

No. of pigs

2

11

13

22

14

28

Åé­«¡A¢V

Body weight

30.54±8.06

33.51±6.62

32.50±6.76

33.47±7.64

27.33±6.83

32.48±8.92

Åé°ª¡A¢Q

Body height

49.80±3.80

46.61±4.28

45.85±2.79

44.60±3.75

39.16±4.36

41.50±4.95

Åéªø¡A¢Q

Body length

66.95±6.95

71.17±6.09

76.65±6.14

75.86±7.70

63.54±7.44

68.11±7.96

¦Õªø¡A¢Q

Ear length

12.25±1.75

11.52±1.12

11.99±0.78

11.77±0.98

9.20±1.26

9.97±1.45

¦Õ¼e¡A¢Q

Ear width

9.35±0.35

9.16±1.04

9.30±1.25

9.07±1.18

6.58±0.93

7.16±0.84

¯Ý²`¡A¢Q

Chest depth

29.55±3.55

28.76±3.19

28.50±2.83

28.42±3.00

23.98±2.86

24.60±3.26

¯Ý³ò¡A¢Q

Chest girth

72.30±9.30

76.92±6.48

71.11±5.09

71.79±5.76

65.34±7.90

69.58±8.42

«eªÏªø¡A¢Q

Length of fore limb

23.10±1.10

22.06±1.90

20.29±1.17

20.21±1.85

18.38±1.86

19.12±2.08

«eªÏºÞ³ò¡A¢Q

Girth of fore limb

12.50±1.50

12.65±0.60

12.83±0.69

12.70±1.09

11.87±1.19

12.27±1.08

«áªÏºÞ³ò¡A¢Q

Girth of hind limb

12.25±1.25

13.00±0.57

13.21±0.92

12.68±1.00

11.49±1.09

11.99±1.16

Áv¼e¡A¢Q

Rump width

21.25±2.25

21.63±1.84

22.60±1.94

22.89±2.54

19.57±3.00

21.27±3.66

§Àªø¡A¢Q

Length of tail

12.60±8.60

14.47±4.99

18.22±2.67

19.47±2.90

11.61±7.18

16.48±4.87

¸A¤Yªø¡A¢Q

Testicular length

6.58±1.58

10.43±1.38

6.21±1.65

¸A¤Y¼e¡A¢Q

Testicular width

2.65±1.15

4.02±0.58

2.76±0.73

¥­§¡±¼Ð·Ç°¾®t¡CMean±Standard deviation.

¡@¡@®Ú¾ÚLegault¡]1998¡^¼¶¼gªº½Þ¤ò¦âÅܲ§ªº¿ò¶Ç¾Ç±M¤å¤¤¡A«ü¥X±±¨î¤ò¦âªº°ò¦]®y¦³Åã©Ê¥ÕªºI°ò¦]®y¡BÂX´²©Ê¶ÂªºE°ò¦]®y©M¥ÕªÓ±aªºBe°ò¦]®y¡A¦ý¥ç«ü¥X³o¨Ç°ò¦]®y¬O«Ø¥ß¦bHetzer¤ó¦Û1945¨ì1954¦~¶¡§Q¥ÎÂÅ·ç´µ¡Bªi¤¤¡B½L§J®L¡B¤j¶Â¡B§ù¬¥§J¡B¬ù§J®L©M¨©´µ±öº¸³ü¸¹µ¥½ÞºØ©Òµoªíªº¤K½g¤ò¦â¬ã¨s¡]Hetzer, 1945a,b,c,d, 1946, 1947, 1948, 1954¡^¡A¥H¤ÎOllivier and Sellier¡]1982¡^©MRempel and Marshall¡]1990¡^ªº¤åÄmÀ˰QÂk¯Ç¦Ó¨Óªº¡C¹ï©ó´Ä¥Õ¬Û¶¡ªºÅé°¼±ø¯¾ªº¤ò¦â¿ò¶Ç«h¥¼¦³Ãþ¦ü¸ê®Æ³Q¤Þ¥Î¡A¦ý¹ï©ó±ö¤s½Þªº¤ò¦â¿ò¶Ç¡ALegault¡]1998¡^«hªì¨B»{©w¨ã¦³ii EE bebe¿ò¶Ç«¬¡A¨Ã»{¬°¨ä¥L¤¤°ê½ÞºØ¦pÅé¦â¥þ¶Âªº·¬®ù½Þ©MÀY§À¶Âªºª÷µØ½Þ§¡¨ãii EE bebe¿ò¶Ç«¬¡C¥L¨Ã°w¹ï±ö¤s½Þªº¥|¸}¥Õ¯S¼x¡A¨Ï±ö¤s½Þªñ¿ËÁc´Þ«á¡A¥|¸}¥Õªº³¡¥÷©¹¤WÂX®i¨ìÅéÂ߸¡³¡¡A¦ý¨Ã¥¼¥X²{¥Õ¦â´³©ó¨ä¥L³¡¦ì¡C·ç¨å¹A·~¤j¾Ç´¿¥H¬ù§J®LºØ©M¼Ú¬w³¥½ÞºØ¶i¦æºØ¶¡Âø¥æ¸ÕÅç¡A§â¬ù§J®LºØªºÅã©Ê¥Õ¦â°ò¦]®y¡]dominant white coat color locus¡^©w¦ì©ó²Ä8¸¹¬V¦âÅé¡]Johansson et al., 1992¡^¡A¨Ã§â¼Ú¬w³¥½ÞºØªº¦Ç½Å¦â»P¶Â¦â¯À»W¿n¦³ÃöªºÂX´²©Ê°ò¦]¡]Extension¡^¥ç©w¦ì©ó²Ä6¸¹¬V¦âÅ骺µuÁu¥½ºÝ¡]Kijas et al., 1996; Mariani et al., 1996; Marklund et al., 1996¡^¡C¬ü°ê¹A·~³¡§J¹p¤¤¤ßªº¦×¥Î¯b¬ã¨s¤¤¤ßRohrer et al. ¡]1997¡^¥ç¥H±ö¤s½ÞºØ©M¸Ó¤¤¤ß¿ï¨|ªº¦X¦¨«~¨tWC½ÞºØ¶i¦æ¤ò¦â°ò¦]©w¦ì¤u§@¡A¨ä¤¤±ö¤s½ÞºØªºÅé¦â¬°¶Â¦â¡A¦ÓWC½ÞºØªºÅé¦â¬°¥Õ¦â¡CWC½ÞºØ¬O¨ã¦³1/4¤Á´µ¯S¥Õ½ÞºØ©M1/4¬ù§J®L½ÞºØªº¦å²Î¡]Rohrer et al., 1994¡^¡CWC½ÞºØªº¥Õ¦â¹ï±ö¤s½ÞºØªº¶Â¦â¬OÅã©Ê¥Õ¡CÃÒ¹êÅã©Ê¥Õªº¤ò¦â°ò¦]¬Oc-KIT°ò¦]¡A²Å¦XSakurai et al.¡]1996¡^ªº±À´ú¡Ac-KIT°ò¦]¦ì©ó²Ä8¸¹¬V¦âÅ骺8p12-p21³B¡C¤é¥»ªF¨Ê¤j¾Ç¦b¶i¦æ´O¦X½Þ¡]Chimeric Pig¡^¸ÕÅç®É¡Aµo²{ÂÅ·ç´µºØ©M¬ù§J®LºØªºÂø¥æ­Fªº­F¸­²Ó­MÅã·Lª`¤J§ù¬¥§JºØÅn­FµÄ«á´O¦X¦Ó¨Óªº¥|ÀY´O¦X½Þ¡AÅé°¼§e²{´Ä¥Õ¬Û¶¡ªº¾î±ø¯¾¡A¬ã¨s¤H­û±À´ú³o¨Ç¨Ó¦Û¥Õ¦â½ÞºØªº¤ò¥Ö²Ó­M¶È¯à¦s¬¡©ó§ù¬¥§J½ÞÅé°¼³¡¦ì¡A¦Ó§Î¦¨¥Õ¦â¾î±ø¡]Inoue et al., 1996¡^¡C¥»¬ã¨s¥HÄõÀ¬½Þ©M§ù¬¥§J½Þ¶i¦æÂø¥æ«á¥NªºÅé¦â¿ï¨|¡A¥ç¦³´Ä¶Â¬Û¶¡ªºÅé°¼±ø¯¾¥X²{¡A·í¶i¤@¨Bªñ¿Ë°tºØ«á¡A±o¨ì´Ä¥Õ¬Û¶¡ªºÅé°¼±ø¯¾¡A¥B¸g¥|¥N¿ï¨|«áÃÒ¹ê´Ä¥Õ±ø¯¾¬Û¶¡¬O¤@¶µÁô©Ê¿ò¶Ç¡CÅé°¼¾î±ø¯¾ªºªí²{¡A¦­¦b1921¦~¥N®ÉLush´N´¿¦b½L§J®L½Þ©M§ù¬¥§J½ÞÂø¥æ¤G¥N¸Ìµo²{¡A¥L¬D¿ï¤@ÀY¦³¥Õ¤ò¦ý¶Â¥Öªº¥À½Þ¡A©M¤@ÀY¦³¬õ´Ä¤ò¤½½Þ¶i¦æÁc´Þ¡A²£¤U11ÀY¥J½Þ¡A¨ä¤¤5ÀY§e²{¥Õ¸¡©M´Ä¥Õ±ø¯¾Åé°¼¡]Lush, 1921¡^¡CMcPhee et al.¡]1931¡^¦b¬ã¨sªi¤¤½Þªºªñ¿ËÁc´Þ¸ÕÅ礤¡A´¿´£¤Î¶Â¦â´³·|¨ü¨ìµ}ÄÀ°ò¦]®y¡]Dilution locus¡^ªº¼vÅT¦Óµo¥Í¶Â¦â¯À»W¿n¤£¥þ¡A¦Ó¦³´Ä¶Â¤ò¦â²VÂø´³ÂI¥X²{¡CSearle¡]1968¡^ ¦b¨ä­÷¨Å°Êª«¤ò¦â¤ñ¸û¿ò¶Ç¾Ç±M®Ñ¤¤´¿©ú¨¥¡A¶Â¦â¯ÀÁû²É¦b¶Â¦â²Ó­M§Î¦¨®É»Ý¥HÁC¯×³J¥ÕÁû²É¬°°©·F¡A¬°¤@¶ê«¬Áû²É¡Aª½®|¦³0.5£gm¡A·íÁû²ÉÅܦ¨¾ò¶ê«¬¡]0.7¡Ñ0.3£gm¡^®É§e¶À´Ä¦â¡AÀHµÛ¾ò¶ê«¬Áû²Éªº°ï¿n¦Óº¥§Î¦¨¶Â¦â¥®²É¡C°g±m½Þ¨ì©Ê¦¨¼ô´Á¥Ö½§·|¦³¶Â¦â¯ÀÁû²É»W¿n¡A¦Ó´Ä¥Õ¬Û¶¡ªºÅé°¼±ø¯¾ªº¤ò¦âº¥§e²{¦Ç½Å¦â¡C¦]¦¹¡A½Þªº¦UºØÅé¦â°ò¦]®y¦³¦h¤Ö¡H¬O§_¦b¦P¤@¬V¦âÅé¤W¡H§Q¥Î¦U½ÞºØÂø¥æªºÅé¦âÆ[¹î¸ÕÅç©Mªñ¿Ë«~¨t¶¡¤§Âø¥æ¸ÕÅç¡Aµ²¦X¬V¦âÅ骺DNA¿ò¶Ç¼Ð°O¤§ÀË´ú¡A±N¦³§U©ó¬ã¨s½Þ¤ò¦â¿ò¶Ç¡C

¡@¡@²Ä¥|¥N¥J½Þ§e²{´Ä¥Õ±ø¯¾ªÌ¦³72.8%¡A¸û¤W¤@¥Nªº25.3% ¼W¥[´Xªñ¤T­¿¡A²Ä¤»¥N¥J½Þ§e²{´Ä¥Õ±ø¯¾ªÌ¦³100.0%¡A´Ä¥Õ±ø¯¾¬O¤@Áô©Ê°ò¦]¡C°g±m½Þ¿ï¨|±Ú¸sªº¸gÀ٥γ~¤W¡A°£¦]¨äÅ髬¤p»PÅé¦â¦³¯S©Ê¡A´£¨Ñ¬°¥ð¶¢Æ[½à¥Î½ÞºØ·¥¨ã¼ç¤O¥~¡A¥ç¦]¨ä¬°ªñ¿Ë¿ï¨|ªº«~¨t¦Ó¥i¨ÑÂå¾Ç¬ã¨s¥Î¹êÅç½Þ¡C¥»¬ã¨s©Ò­zªº¥ð¶¢Æ[½à¥Î½ÞºØ¤§°ö¨|¸ÕÅç¡A¦b°ê»Ú¤W¬O½Þ¨|ºØ¬ã¨sªº­º¨Ò¡C¦Óª½±µ§Q¥Î¤ò¦â¶i¦æ«á¸Ç¿ï©Þ¡A¥ç¬O½Þ¤ò¦â¿ò¶Ç¬ã¨sªº­º¨Ò¡C

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§d©ú­õ¡C1991¡C¥ð¶¢Æ[½à¥Î½ÞºØ¡G¢¹. ÄõÀ¬¤p¦ÕºØ»P§ù¬¥§JºØÂø¥æ½Þ¤§Åé¦â´ú¥æ¸ÕÅç¡C¤¤¯b·|»x20¡]¼W¥Z¡^¡G7¡]ºK­n¡^¡C

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Mitsai, a Miniature Pig Selected for Ornamental

and Recreation Purposes(1)

Ming-Che Wu(2)(5), Chii-Jong Lee(3), Jinn-Lang Tzeng(3),

Wen-Cherng Chen(3) and Hsiu-Luan Chang(4)

Received Oct. 31, 1998; Accepted March 10, 1999

ABSTRACT

¡@¡@A new miniature pig for ornamental purpose was developed. In 1989, two Lanyu boars were used to mate six Duroc sows; and semen collected from three Duroc boars was used to inseminate five Lanyu sows. Their hybrid piglets were examined for coat color at eight weeks of age. Piglets exhibited longitudinal stripes from head to tail. Several brown stripes and black stripes appeared side by side on piglets from either Lanyu x Duroc crossing or Duroc x Lanyu crossing. Those piglets with brown-black stripes were then selected as breeding stocks and bred by half sib relation to produce brown-white stripping piglets, but the brown-white stripping faded at puberty. Brown-white stripping piglets were named as the Mitsai pig. A selection program for brown-white stripping was launched in 1992 with six male and 18 female pigs for each generation and for each year. Experimental results were as follows: The third generation (F3) of Mitsai sows produced 6.00±2.10 piglets born alive per litter and 72.8% of F4 piglets exhibited brown-white stripes as compared to 25.3% in F3, which increased almost three times. All F6 piglets exhibited brown-white stripes. Brown-white stripes exhibited and remained so even when pigs reached the mature age. The gene for brown-white stripping was postulated to be a recessive gene. For the economical usage, the Mitsai line with characteristics of miniature type and coat color could be used as ornamental pig for recreation. It could also serve as a laboratory animal for biomedical research. ¡]Key Words¡GPig, Coat color, Conservation, Selection¡^