12 () 34 N o. of ch romo2 som e 2 T able 2 Ch romo som e relative length in sem ifine2w oo l and sem ifine2woo l N o. of T ype ch romo2 som e sem ifin

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1 34 12 () V o l. 34 N o Jour. of N o rthw est Sci2T ech U niv. of A gri. and Fo r. (N aṫ Sci. Ed. ) D ec Ξ 1, 2, 2, 1 (1, ; 2, ) [],, 2N = 54, XY; 2N = 54, XX (P < 0. 05), P < 0. 10, (P > 0. 10) (P > 0. 10),, 1 P < [] ; ; ; [] S813. 1; S826 [] A [ ] (2006) ,,,, 48 50,,,, 2, , 2 ;, [ 1 ], 1 10 Giem sa,, O lympus BH 22,, Pho to shop 5. 0, Excel,, [2 ] 1, 2, 3 [3 ],, Pho to shop 5. 0 = g( X ) ; = g ; = g , 2, T able 1 Ch romo som e arm ratio in N o. of ch ro somo se sem ifine2w oo l and sem ifine2 woo l Ξ [ ] [ ] (BM BF) (CHN 00316) ; (Y1101) [ ] (1973- ),,,,, E2m ail: xqli@ shfu. edu. cn [ ] (1956- ),,,,, E2m ail: w dengjun@ sicau. edu. cn

12 () 34 N o. of ch romo2 som e 2 T able 2 Ch romo som e relative length in sem ifine2w oo l and sem ifine2woo l N o. of T ype ch romo2 som e sem ifine2woo l 1 9. 789 0. 542 a 9. 373 0. 345 b M 15 2.

2 12 () 34 N o. of ch romo2 som e 2 T able 2 Ch romo som e relative length in sem ifine2w oo l and sem ifine2woo l N o. of T ype ch romo2 som e sem ifine2woo l a b M a b T M T M T T T T T A B T T T T T T T a b T T A B T T a b T T T T X T T Y M T ype :M. ; T. ; P < 0. 10, P < N o te:m. M etacentric ch romo som e; T. telocentric ch romo som e; V o lum e w ith different sm all letters in the sam e line indicate significant dif2 ference (P < 0. 10), different cap ital letters m ean significant difference (P < 0. 05). 1, , (P > 0. 10) 2, (P < 0. 05), P < 0. 10, (P > 0. 10) [ 2 ], ,, , 2 : 54, XY; 54, XX; 26, 3 (M ), 4 26 (T ), X (T ), Y (M ), Y, 1 F ig. 1 Karyo type of m ale sem ifine2w oo l

3 12 : 13 2 F ig. 2 Karyo type of fem ale sem ifine2w oo l 3 F ig. 3 Karyo type of m ale 4 F ig. 4 Karyo type of fem ale 2. 3 (),, 1, ( 1), : 2,, 1, 2, 3

4 14 () 34 33, 1, 2 3, 1 P < 0. 10, 3 1, 2 3 T able 3 Comparison of ratio of longgsho rt ch romo som e of N o. 1, 2, 3 in sem ifine2w oo l B reed sem ifine2 woo l and R atio of longgsho rt ch romo som e in homo logous ch romo som e a b : P < 0. 1 N o te: D ata w ith different sm all letters in the sam e co lum e m eans signifi2 cant difference (P < 0. 1) , (P > 0. 05), [4 ], 3 [5 ], X [6 ] ;, [7 ], 27 6 (P < 0. 10),,,,,,,,,,,,,, [8 ] ( ), 10, ,, 3. 2, 2, [4, 6, 9 ], 1, 2, 3, (1 ),, 2 1, 2, 3, [9 ] [10211 ], [6 ] [9 ] [6 ] 3. 3 [12 ] [13 ] DNA,, ( ),, [3, 14 ] [3 ] [15 ] ( g ), ( ),,,,,,,,, 1 P < 0. 10

5 12 : 15,,,,,, [ ] [ 1 ]. [M ]. :, 1987: [ 2 ] L evan A, F redga K, Sandbergm A A. N om enclature fo r centrom eric po sition on ch romo som es[j ]. H ereditas, 1964, 52 (2) : [ 3 ],. [J ]., 1996, 31 (1) : [ 4 ],,,. [J ]., 1994, 24 (6) : 528. [ 5 ],,,. [J ]., 1998 (2) : 324. [ 6 ],,,. [J ]., 1991 (2) : 528. [ 7 ],,,. [J ]., 1998, 19 (3) : [ 8 ],,,. [J ]., 2003, 25 (6) : 729. [ 9 ],,,. [ J ]., 1991, 13 (4) : [ 10 ]. [J ]., 1980, 11 (2) : 426. [ 11 ],,,. [J ]., 1998, 34 (2) : [ 12 ],,,. [J ]., 1992, 22 (5) : 829. [ 13 ],,,. [J ]., 1995 (3) : [ 14 ] E ldridge. Cytogenetics of livestock [M ]. U SA : T he AV I Publish ing Company, 1985: 224. [ 15 ],,. [J ]., 2003, 25 (1) : [ 16 ]. [J ]., 1987 (3) : Com parative study on the karyo types in sem ifine2w oo l and L I X iao-q in 1,W U D eng- jun 2, CHEN Shen-gou 2,L ENG X iang- jun 1 (1 S hanghai F isheries U niversity, S hanghai, , China; 2 Colleg e of A nim al S cience and T echnology, S ichuan A g ricu ltu ral U niversity, Y aπan, S ichuan , Ch ina) Abstract: Fou r Sem ifine2w oo l Sheep and fou r Sheep w ere u sed to compare the karyo types, w h ich w ere emp loyed on slides ob tained from the peripheral b lood cell cu ltu re. T he resu lt show ed that: the num ber of dip lo id ch romo som e of the tw o b reeds w as 54 (2n= 54), the karyo type of ram 54, XY, and the ew eπs 54, XX. T here w ere sign ifican t differences in relative length of N o. 6 and N o. 24 ch ro2 mo som es betw een the tw o b reeds (P < 0. 05), the N o. 1, 15, 23, 25 had sign ifican t differences betw een the tw o b reeds at P < level, and the o thers had no sign ifican t differences (P > 0. 10). Som e homo logues ch romo som e w ere differen t in length in the tw o b reeds, and the ch romo som e length ratio s of N o. 1, 2, 3 in Sem ifine2w oo l w ere h igher than tho se in. A nd there w as sign ifican t differ2 ence of N o. 1 betw een the tw o b reeds (P < 0. 10). Key words: sem ifine2w oo l ; ; ch romo som e; karyo type

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50 ( ) 11 11 3 ( ) V o l. 11 N o. 3 2009 9 Journal of A nhui U niversity of Science and T echno logy (Social Science) Sep. 2009, (1) (, 362011) :,,,,, ;,,,,,,,,,,, : ; ; : I106. 21: A : 167221101 (2009) 0320049205