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Nghiên cứu đa dạng di truyền một số giống bưởi bản địa Việt Nam (Citrus grandis) bằng chỉ thị Microsatellite

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Nội dung Text: Báo cáo " Nghiên cứu đa dạng di truyền một số giống bưởi bản địa Việt Nam (Citrus grandis) bằng chỉ thị Microsatellite "

Tgp chi Cdng nghe Sinh hgc 1{A): 485-492, 2009 N G H I E N C U t r D A D A N G DI TRUYfiN M O T SO G I O N G B U d l B A N D I A V I E T N A M (C/77?£/5 GJ?^iVZ)ZS> B A N G CHI THI M I C R O S A T E L L I T E Khu^t Hihi Trung', Ha Trgng Huy', Nguyin Tru-oug Khoa', Ngo H6ng Binh^ Nguygn Thanh Binh^, Dang Trong Lirong', Le Huy Ham' ' Vien Di truyin ndng nghiip ^Vien Nghiin cieu rau qud ^Vien Nghiin cieu cdy dn qud mien Nam TOM TAT Buoi thugc nhom cay an qua co mui co nguon goc xuat xif o Tmng Quoc, phia Tay An Do, Viet Nam va mgt so nuac Dong Nam chau A. Cac thong tin ve da dang di tmyen rat quan trgng trong cac chuong trinh bao ton nguon gen, chpn tao giong va phat trien cac giong buoi co gia tri thucmg mai cao. 35 moi SSR da dugc sii dung de danh gia mirc da hinh a mirc do phan tit ciia 29 mau thuoc 11 giong buoi ban dia ciia Viet Nam. Tong so 115 allele da dugc phat hien vai gia tri tmng binh la 3,29 allele/moi; he s6 PIC dao dgng tir 0,0 dSn 0,82 (tmng binh la 0,45); ty le di hgp ciia cac mau giong nghien cim dao dong tir 35,29 den 51,66%. Miic tuong dong di tmyen dugc xac dinh sir dung he so tuong dong Jaccard va phuang phap phan nhom UPMGA da chia%Ti ^ 29 mau nghien cim thanh 8 nhom khac biet voi he so tuong d6ng giiia cac mlu dao dgng tir 0,32 din 1,0. Cac ket qua thu dugc c6 the sir dung phuc vu cho cong tac phan loai, bao ton khai thae sir dung cac nguon gen ' ^ - trong cac chuong trinh lai chpn tao giong. Tu- khoa: Bdn dia, budi, cdy co miii, chi thi SSR, da dgng di truyen ' •.' M d DAU da dugc de cap nhu: chi thi Isozyme (Nguyen Van Mui et al, 2000); chi thi RAPD (Nguyin Thanh Nhan Tren the giai, chi thi SSR dugc sir dung kha et al, 2004) va SSR (Trln Thi Oanh Yin et,al. 2004). pho bien de phan tich da dang di truyen cac loai Trong nghien ciru nay, chiing toi trinh bay ket qua thugc chi Citrus a muc do quan the, cimg loai va nghien ciiu xac dinh moi quan he di truyen giiia cac khac loai (Froelicher et al, 2008); xac dinh giong/loai buai bang ky thuat SSR nham phuc -vu nhanh chong cac cay con sinh ra tir hgp tit hoac cong tac thu thap, phan loki, bao ton, khai thae va sir tir phoi tam nham loai bo cac kieu gen khong dung nguon gen cac cay an qua ban dia quy ciia Viet mong muon (Ruiz et al, 2000); va de nhan dang Nam. cay lai hiiu tinh trong cong tac lai tao giong an qua C miii (Oliveira et al, 2002). Chi thi SSR O Cling da dugc sir dung trong phan tich moi lien V A T L I E U V A PHUONG P H A P • \ \ ket va su phat sinh loai a Citrus va Poncirus (Kijas et al, 1997) va danh gia da dang di truyen Vat lieu a cay c6 miii (Barkley et al, 2006); phan tich dac Tap doan buai sir dung trong nghien ciiu la,cac tinh va su da dang cua Buai chum (Corazza- mau giong buai ban dia cua Viet Nam dugc yien Nunes et al, 2002). Ngoai ra, chi thi SSR con Nghien ciiu rau qua - Trau Quy, Gia Lam, Ha Ngi va dugc sii dung ket hgp vai cac chi thi khag Vien'Nghi eh' ciru cay an qua mien Nam, Long Dinh, (RAPD, RFLP va CAPs) d l xay dung ban d6 lien Tien Giang cimg cap. Cac mau la dugc thu tai vuan ket, phan tich di truyen cua su tiep hgp vo tinh tap doan cila Vien Nghien ciiu rau qua, Vien Nghien giiia Citrus va Poncirus va dimg trong phan tich cim cay an qua mien Nam va tai cac dia phuang he gen di truyen te bao chat cua cac the lai sinh dang trong pho bien cac giong buai nay (Bang 1). chat lien quan den cac cay nhi bgi, tic bgi va bat bgi a cay an qua co mui (Guo et al, 2006). Trong nghien cim nay, 35 moi dugc sit dung va mo ta bod FroeUcher va dong tac gia (2008), Corazza-Nunes Ci nudc ta, viec ung dung cac chi thi phan ht ti-ong va dong fac gia (2002) va Barkley va dong tac gia (2006) nghien ciiu nhom doi tugng cay an qua co miii ciing do hang Bioneer cung cap (Bang 2). 485
Khuat Hiiu Trung et al Bang 1. Danh sach va nguon g6c cac miu giong buai nghien CLPU. TT Ten giong biro"! Ky hieu mau Dja diem thu mau Nguon goc 1 SCPU Chi Dam S 1 , S 2 , S3 Phil Thg Phu Thg 2 B l n g Luan BL1,BL2, BL3 Phil Thg Phil Thp 3 Diin D 1 , D 2 , D3 Vien Nghien cuu rau qua HaNoi 4 0 6 Me Linh DIVIL1, DML2, DML3 Vien Nghien ciru rau qua VTnh Phiic 5 Phiic Trach P T I , PT2, PTS Vien Nghien ciru rau qua Ha TTnh 6 Thanh Tra TT1,TT2, TT3 Vien Nghien ciru rau qua Hue 7 Do Hul DH1, DH2, DHS Vien Nghien ciru rau qua Hue 8 Pho Trach PTr1,PTr2 Vien Nghien ciru rau qua Hue 9 Nam Roi NR1, NR2, NRS Ben Tre VTnh Long 10 Da Xanh DX1, DX2, DX3 Vien Nghien CLPU cay an qua mien Nam Ben Tre 11 Dirong La Cam DLC1, DLC 2, DLCS Tan Trieu Dong Nai Phu-ong phap nghien cihi Trong do: X: la tong so moi co xuat hien 2 allele/1 locus SSR. M: la tong so moi dugc su dung Tdch chiet DNA tdng so trong nghien cim. Y: la tong so moi SSR co xuat La banh te ciia cac mau giong dugc thu thap, xir hien bang DNA. ly va tach chiet DNA tong so theo phuang phap cua Ty le khuyet so lieu (M%) dugc tinh bang cong Cheng va dong tac gia (2003). thiic: Chay PCR Cac phan iing PCR dugc thuc hien theo chuang M%: hinh: 94°C (5 phiit), 35 - 37 chu ky [94°C (40s); M 55°C - 60°C (30 s), 72°C (30 s - 1 phiit)] va kit thiic Trong do: Z la tong so moi khong xuat hien bang a 72°C (5 phiit). DNA. M la tong so moi dugc sit dung trong nghien ciiu. Dien di san pham PCR vd nhuom San pham PCR dugc bien tinh truac khi chay dien KET QUA v A T H A O LUAN di tren gel polyacrylamide 4,5% va dugc phat hien bSng phuang phap nhuom bac. He so PIC, so allele va tong so bang ADN the hien Phan tich so lieu tren tung moi Ket qua dugc thong ke dua vao su xuat hien hay He so PIC {Polymorphic Information Content) khong xuat hien cua cac bang DNA. So lieu dugc xu- dugc coi la thuac do tinh da dang di truyen cua cac ly, phan tich bang chuang tnnh Exel version 5.0 va allele a timg locus SSR. Ket qua nghien ciiu chi ra a phan mim NTSYSpc 2.1. bang 3 cho thay: gia tri PIC cua 35 moi vai cac mau giong buai nghien ciiu dao dgng tir 0 (a cac moi chi He so PIC (Polymorphic Information Content) xuat hien bang dan hinh) den 0,82 (a m6i GT03 vai 7 dugc tinh theo cong thiic sau: allele the hien); he so PIC trung bmh cua ca 35 mli la PIC =1 - ZPi^ (trong do Pj la tan s6 xuat hien cua 0,45. Kit qua nay cho thiy, miic do da dang cua cac allele thii i). allele a cac giong buai ban dia cua Viet Nam tuang tu Ty le di hgp (H%) ciia m§i mlu dugc tinh theo mgt s6 kit qua nghien ciiu a cay c6 miii tren thl giai cong thiic: (Corazza-Nunes e^fl/., 2002; Barkley etal, 2006). Phan tich 35 mli SSR voi 29 mlu thugc 11 X H%: gilng buai thu dugc 4 moi cho locus dan hinh M-Y (Ci02B10, Ci07E06, mCrCIR06A03 va NTCP9) va 486
Tgp chi Cdng nghi Sinh hgc 7(4): 485-492, 2009 31 mli cho cac locus da hinh, vai ting s6 115 allele, allele, 4 mli thu dugc 3 allele, 10 moi thu dugc 4 trung binh la 3,29 allele/locus. Trong ting sl 31 mli allele, 2 mli thu dugc 5 allele, 1 mli thu dugc 6 cho cac locus da hinh thi co 11 mli chi thu dugc 2 allele va 3 mli thu dugc 7 allele (Bang 3). Bang 2. Ten va trinh tu cac moi SSR. TT Ten moi Trinh tif moi (5' - 3") TT Ten moi Trinh tif moi (5' - 3') F: GATGATGTCACCCTTGTTGTTG mCrCIROI F: AAGCATTTAGGGAGGGTCACT 1 Ci01A07 19 F04a R: TTATGTCTCCTTTCCCTTTTGT R: TGCTGCTGCTGTTGTTGTTCT F:GTCACTCACTCTCGCTCTTG mCrCIROe F: TGAATCCTCTATGGCTAT 2 Ci01C07 20 R: TTGCTAGCTGCTTTAACTTT A02 R: TAAGATAAAAACAGCACA F:AAAACAACCAAAAGGACAAGATT mCrCIROe F:GGGTTGCGACGATGAGC 3 CiOIHOS 21 R: TTCAAACTAAACAAACCAACTCG AOS R: TCTCGGTTTGGCAGTTCG F: CCGCTTTGTTCCATT mCrCIROe F: TTTTTGTTATGGTGTTCGTTGTT 4 Ci02A04 22 R: AGCGGTATCGTAATTCTC AOS R: TGGTATTATTTTGTCATTCATTTG F:GCAAAACAAGCAGACTACAAAT F-CCATTGCTTACGAAGTTG 5 CiOIDII 23 P73 R:AGGACAGATGACCCAGATGACA R-TTGACTTGCAGCAATCAG F:CAGCTCAACATGAAAGG F-GATTGAATCTTCTGTAGCTC 6 Ci02B07 24 P94 R: TTGGAGAACAGGATGG R-ATCATCATCTAGTGTCACTG F: TTTCACAGCCATCACA F:ATCACAATTACTAGCAGCGCC 7 Ci02B10 25 CAC2S R: AACACCAAGAAGGAAGAG R: TTGCCATTGTAGCATGTTGG F: GCAGCGTTTGTTTTCT F: CTTCCAAGCTAACGATGC 8 Ci02F07 26 NTCP9 R: TGCTGGTTTTCAGATACTT R: CTGTCCTATCCATTAGACAATG F: TCTCTGGTTGGTTTTTGTGA F:TTTGACATCAACATAAAACAAGAAA 9 Ci06A05b 27 AC01 R: ATGATGAAAAGCAAGGGG R: TTTTAAAATCCCTGACCAGA F: AAACTGGAGTGCTAAATCT F: AAAGGGAAAGCCCTAATCTCA 10 Ci07B09 28 AGM R: AAAGAAGTTAAAGAAAAAATG R: CTTCCTCTTGCGGAGTGTTC F: CGAGACAGACACAACAAAAA F: AACACTCGCACCAAATCCTC 11 Ci07D10 29 CAG01 R: AGAGGGTAATCCAAAAGACT R: TAAATGGCAACCCCAGCTTTG F: AATAAACGCCCACCTGAGAC F: GCTTTCGATCCCTCCACATA 12 Ci07E06 30 CAT01 R:CAGTTGTTAAAAGGGAAGAATGAA R: GATCCCTACAATCCTTGGTCC F: TCAACAAAACCATTACAT F:ACGGTGCGTTTTGAGGTAAG 13 Ci07G07 31 CT02 R: AGTCTTTCACGTTAATCAC R: TGACTGTTGGATTTGGGATG F: GAGACTTTACTTGAATGAA F: CGAACTCATTAAAAGCCGAAAC 14 CIOSAIO 32 CT21 R: ATCTCGTGTTGAAAATAA R: CAACAACCACCACTCTCACG F: TCCACAGATTGCCCATTA F: TCAGACATTGAGTTGCTCG 15 Ci08C05 33 CTT01 R: CCCTAAAAACCAAGTGACA R: TAACCACTTAGGCTTCGGCA mCrCIROI F:TCAACTTCTCTGGTCTCTC F: GCCTTCTTGATTTACCGGAC 18 34 GTOS B02 R: TTAGCAATATCAACATCAT R: TGCTCCGAACTTCATCATTG mCrCIROI F:AAAAATTGCCCTCTTCTCCT 17 BIO R: TGGTGGTTTTGTTGGTTCTAT F: CGCCAAGCTTACCACTCACTAC 35 CTI 9 mCrCIROI F: GATCAAAACATTATTCCAA R: GCCACGATTTGTAGGGGATAG 18 D06a R: TTTTTCATCAACAAGACTG 487
Khuat Hiiu Trung et al Bang 3. He s6 PIC va so allele the hien cue tung m6i. TT Locus So Tong so PIC TT Locus So Tong so PIC allele/moi allele/moi allele/moi allele/moi 1 CiO1A07 2 29 0,50 19 mCrCIROI F04a 7 47 0,76 2 Ci01C07 4 52 0,65 20 mCrCIR06A02 4 40 0,57 S Ci01H05 5 35 0,70 21 mCrCIR06A0S 1 29 0,00 4 Ci02A04 2 S3 0,12 22 mCrCIR06A08 4 48 0,56 5 CiOIDII 2 57 0,50 23 P7S 3 46 0,58 6 Ci02B07 4 34 0,40 24 P94 2 29 0,48 7 Ci02B10 1 29 0,00 25 CAC23 3 36 0,37 8 Ci02F07 3 31 0,45 26 NTCP9 1 28 0,00 9 Ci06A05b 4 46 0,55 27 AC01 4 49 0,71 10 Ci07B09 2 27 0,20 28 AGM 7 45 0,74 11 Ci07D10 2 31 0,07 29 CAG01 4 49 0,62 12 Ci07E06 : 1 29 0,00 30 CAT01 2 40 0,45 IS Ci07G07 5 47 0,65 31 CT02 2 55 0,49 14 CIOSAIO 2 28 0,07 32 CT21 4 45 0,53 15 CiOSCOS 2 44 0,48 33 CTT01 4 58 0,71 16 mCrCIR01B02 4 37 0,35 34 GTOS 7 41 0,82 17 mCrCIROIBIO 3 36 0,46 35 CTI 9 2 32 0,50 18 mCrCIROI DOBa 6 53 0,81 Trunc1 binh 3,29 39,86 0,45 Ty le khuyet so lieu (M%) va ty le d| hop (H%) ciia mien Nam co mirc di hgp tir trung binh la 44,17% cac mau giong bu-oi nghien cihi cao hon so vai mirc di hgp tir cua cac mau buai a miln Bdc (trung binh la 39,58%). Ket qua a bang 4 cho thay, ty le khuyet so lieu Nhu vay, ket qua phan tich 35 moi SSR vai 29 cao nhat o hai mau buai Thanh Tra (TT2 va TT3) mau thugc 11 giong buai cho thay: khong c6 mau cimg C ty le khuyet so lieu la 14,29%, c6 11 mau c6 O nao dong hgp tii a ca 35 locus nghien ciiu. Ket qua ty le khuyet so heu tir 2,86 - 11,43%, 16 mau khong tren ciing cho thay giiia cac giong co su khac nhau bi khuyet so lieu. Nhu vay, danh gia a 35 locus thi ca vl miic do di hgp a cac locus nghien ciiu. Trong 29 mau deu co y nghia thong ke. Cling mgt giong, duy nhat a giong buai B5ng Luan, Ty le cac allele di hgp (H%i) cua cac mau kha ca 3 mlu C mirc di hgp tir giong nhau; a cac gilng O cao, ty le di hgp trung binh ciia ca tap doan la khac, giira cac mlu giong c6 su khac nhau a cac 41,19%. Ty ie allele di hgp cao nhat la 51,61%, a locus khac nhau. Nhii-ng ket qua nay rit hiru ich dl mau DX3 thugc giong buai Da Xanh. Ty le allele di danh gia da dang di truyen ben trong gilng va nhan hgp thap nhat la 35,29% a mlu PT3 thugc giong dang chinh xac nhung dong (ca the) u-u viet trong tap buoi Phuc Trach. Cac mau giong con lai co ty le di doan phuc -vu trong cong tac chgn va tao gilng chit hgp dao dgng tir 36,36 din 46,88%,. Cac mlu buai a lugng. 488
Tgp chi Cdng nghi Sinh hgc 1{A): 485-492, 2009 Bang 4. Ty le khuygt so lieu (M%) va ty le di hgp (H%) cua cac gi6ng buai dga tren kk qua phan tich 35 locus khac nhau. TT Ki hieu mau M% H% rr Ki hieu mau M% H% 1 SI 5,71 36,36 16 TTI 0,00 40,00 2 S2 0,00 40,00 17 TT2 14,29 40,00 3 S3 2,86 41,18 18 TTS 14,29 36,67 4 BL1 0,00 42,86 19 PTrl 2,86 41,18 5 BL2 0,00 42,86 20 PTr2 0,00 40,00 6 BLS 0,00 42,86 21 NR1 2,86 41,18 7 Dl 5,71 39,39 22 NR2 2,86 41,18 8 D2 0,00 37,14 23 NRS 0,00 40,00 9 DS 0,00 37,14 24 DX1 0,00 45,71 10 ' DML1 2,86 41,18 25 DX2 8,57 46,88 ,. 11 DML2 0,00 40,00 26 DXS 11,43 51,61 12 DML3 0,00 42,86 27 DLC1 0,00 45,71 12 PTI 0,00 42,86 28 DLC2 0,00 42,86 14 PT2 0,00 37,14 29 DLCS 5,71 42,42 15 PTS 2,S6 35,29 •'^fl^^^Hw^^W^WI™^ 'A //I' jSswy y/A Hinh 1. Dien di san pham PCR moi mCrCIR06A08. M. PhiX174 DNA/Hlnfl IVlarker. 1 - 3. SLPU Chi Dam; 4 - 6. Bang Luan; 7 - 9. Diln; 10 - 12. Do IVIe Linh; 13 - 15. Phiic Trach; 16 - 18. Thanh Tra; 19 - 20. Pho Trach; 21 - 23. Nam Roi; 24 - 26. Da Xanh; 27 - 29. Duong La Cam. Ket qua phan tich moi quan he di truyen ciia Me Linh va buai Nam Roi (he so tuong dong di tap doan biro-i nghien ciru truyen trung binh giiia cac cap mau giong la 0,36). 0 giong buai Siru va giong buai Bang So lieu thu dugc tir 35 moi SSR dugc thong ke Luan, cac mau nghien ciru co kieu gen tuang tu va phan tich bang phan mem NTSYSpc2.1, tir do nhau a ca 35 locus nghien cuu (giUa cac mau thiet lap dugc bang he so tuong dong di truyen va so giong C he so tuong dong di truyen la 1,0). O O do hinh cay ve moi quan he di truyen cua cac mau cac giong khac thi co su da dang di truyen giiia buai nghien ciru (Hinh 2). cac mau trong ciing mgt giong. Ket qua cho thay, he so tuang ding di truyin O mirc tuong dong di truyen 57%o, 29 mau giong cua 29 mlu bucri dao dgng tir 0,32 din 1,0. Giua buai nghien cim dugc chia thanh 8 nhom khac nhau: cac gilng buai Situ Chi Dam vai buai Pho Trach C su sai khac lan nhat (he so tuong ding di O Nhom 1 gom 3 mau Sl, S2 va S3 deu thugc giong truyin trung binh giQ'a cac cap mlu gilng la buai Sim Chi Dam c6 kieu gen tuong tu nhau a ca 35 0,34); dip din la su sai khac giiia gilng buai Do locus nghien ciru, he so tuang dong di truyen giiia 489
Khult Huu Trung et al cac mau giong deu la 1,0. Nhom VII gIm 3 mlu thugc gilng buoi Thanh Tra (TTI, TT2 va TT3). Trong do, 2 mlu TTI va Nhom II gIm 3 mlu Dl, D2 va D3 diu thugc TT3 C kilu gen tuong tu nhau a 35 locus nghien O gilng buai Diln. Trong do, mlu Dl va D2 co kieu ciru. Mlu TT2 co he sl hiong ding di truyin vai cac gen tuang hr nhau (he sl tuong ding la 1,0), nilu D3 mlu TTI va TT3 diu la 0,98. C kilu gen khac va he sl tuang dong vai 2 mlu con O lai diu la 0,96. Nhom VIII gIm 9 mlu diu thugc cac gilng buai cua mien Nam dugc chia iam 3 nhom phu: Nhom III gIm 3 mlu BLl, BL2 va BL3 diu thugc gilng buai Blng Luan co kilu gen tuong tu Nhom 8.1 gIm 3 mlu buai Nam Roi, trong do 2 nhau (he sl tuang dong di huyen giiia cac mau mlu NRl va NR2 c6 kilu gen tuong tu nhau (he so giong deu la 1,0). Urang dong la 1,0). Mlu NR3 c6 he sl tuong dong di Nhom IV gIm 3 mlu thugc giong buai Do Me truyen vai cac mau NRl va NR2 deu la 0,92. Linh (DMLl, DML2 va DML3). Trong do, he sl Nhom 8.2 co 4 mau gom 3 mau buai Da xanh va tuong ding di truyin giira cac cap mau DMLl - mgt mau buai Duong La Cam (DLCl). Trong do, DML2, DMLl - DML3, DML2 - DML3 lln lugt la DXl va DX2 co kieu gen tuong tu nhau (he so tuong 0,94, 0,92 va 0,98. ding di truyin la 1,0), mau DX3 co he so tuong dong Nhom V gIm 2 mlu PTrl va PTr2 thugc giong di truyen vai cac mau DXl va DX2 deu la 0,98. He buai Pho Trach. He sl tuong ding giiia 2 mlu la so tuong dong di truyen cua mau DLCl vai cac mau 0,96. DXl, DX2, DX3 lln lugt la 0,98, 0,98 va 0,96. Nhom VI gIm 3 mlu PTI, PT2 va PT3, he sl Nhom 8.3 gIm 2 mlu DLC2 ya DLC3 thugc tuong dong di truyen giiia cac cap mau PTI - PT2, gilng buai Duong La Cam co he so tuang dong di PTI - PT3, PT2 - PT3 lln lugt la 0,98, 0,98 va 0,96. truyin la 0,98. Sl S2 S3 Dl D2 D3 BLl BL2 BL3 DMLl DML2 DML3 PTrl PTr2 £ PTI PT2 PT3 TTI TTS - ^ TT2 NRl NR2 NR3 DXl DX2 DLCl ^ DX3 DLC2 -1= DLC3 fl? s6 tacmg ding di tzuyko Hinh 2. Sa 66 hinh cay ve moi quan he di truyen cua cac miu buoi nghien ciru. 490
Tgp chi Cdng nghi Sinh hgc 7(4): 485-492, 2009 KET LUAN Corazza-Nunes MJ, Machado MA, Nunes CWM, Cristofani M, Targon MLPN (2002) Assessment of Tap doan buai ban dia ciia Viet Nam rtt da dang genetic variability in grapeiruits (Citrus paradisi Macf) and pummelos (C. maxima (Burm.) Merr.) using RAPD va phong phii, ket qua nghien ciiu vai 35 mli SSR and SSR markers. Euphytica 126:169-176. tren 29 mlu buoi thugc 11 gilng da thu dugc 115 loai allele khac nhau (sl allele thl hien/moi trung Froelicher Y, Dambier D, Badssene JB, Costantino G, binh la 3,29); he s l PIC dao dgng tir 0,0 din 0,82 Lotiy S, Didout C, Beaumont V, Brottier P, Risterucci (trung binh la 0,45); ty le allele di hgp cua ca tap AM, Luro F, Ollitrauh P (2008) Characterization of doan dao dgng tir 35,29 den 51,66%. microsatellite markers in mandarin orange (Citrus reticulate Blanco). Mol Ecol Res 8: 119-122. O miic tuong dong 57%, cac mau buai dugc Guo WW, Cheng YJ, Chen CL, Deng XX (2006) phan chia thanh 10 nhom khac biet thugc 8 nhom Molecular analysis revealed autotetraploid, diploid and Ion, hau nhu cac mau cua moi giong deu nam trong tetraploid cybrid plants regenerated from an interspecific mgt nhom rieng va co the de dang phan biet vol cac somatic fiision in Citrus. Sci Hort 108: 162-166. giong buoi khac. Ket qua nay la ca so de xac dinh Kijas JMH, Thomas MR, Fowler JCS, Roose ML (1997) cac marker phan tir nhan dang chinh xac cac giong Integration of trinucleotide microsatellites into a linkage buai ban dia cua Viet Nam. map of Citrus. Theor Appl Genet94: 701-706. Dua vao su sai khac giiia cac mau trong cung Nguyen Van Mui (2000) Pho isozyme esteraza cua mgt so mgt giong (su da dang di truyen ben trong giong) co giong quyt (Citrus reticulata BL.). Nhirng vdn de nghien the chgn ra cac ca the uu viet phuc vu cong tac chgn, ciru ca bdn trong sinh hpc. Nha xuat ban Dai hgc Quoc gia tao giong, nhan giong va bao ton c6 hieu qua cac HaNoi: 123-127. nguon gen quy. Nguyen Thanh Nhan, Nguyen Minh Chau, Tokurou Shimizu, Mitsuo Omura (2004) U'ng dung RAPD marker Loi cam on: Cdng trinh dugc thuc hiin tie ngudn phan biet giong va phan tich nhom cac giong/loai thugc chi kinh phi cua di tdi KC. 04.16/06-10 (Di tdi: "Nghiin citrus a Viet Nam. Kit qud nghien cm khoa hpc cong nghe cieu ddnh gid tu lieu hda ngudn gen cdy trdng bdn rau qud 2002 - 2003. Nha xuat ban Nong nghiep: 48-56. dia qui a miec do phdn tit di bdo tdn vd sie dung Oliveira AC, Novae GA, Cristofani M, Machado MA chimg cd hiiu qud "). (2002) Identification of citrus hybrids through the combination of leaf apex morphology and SSR markers. T A I L I E U THAM KHAO Euphytica 128: 397-403. Ruiz C, Breto MP (2000) A quick methodology to identify Barkley NA, Roose ML, Krueger RR, Federici CT (2006) sexual seedlings in citrus breeding programs using SSR Assessing genetic diversity and population stracturein a markeis. Euphytica 112: 89-94. citrus germplasm collection utilizing simple sequence repeat markers (SSRs). Theor Appl Genet \\2: 1519-1531. Tran Thi Oanh Yen, Nguyen Ngoc Thi, Luro Francois (2004) Phan biet tinh da dang di tmyen nguon gen cay an Cheng YJ, Guo WW, Yi HL, Pang XM, Deng XX (2003) qua C mui o Viet Nam bang microsatellite marker. Ket qud O An efficient protocol for genomic ADN extraction from nghien cieu khoa hpc cong nghe rau qud 2002 - 2003. Nha Citrus species. Plant Mol Biol Rep 21:177. xuat ban Nong nghiep: 57-66. 491
Khult Hiru Trung et al A S S E S S M E N T OF G E N E T I C D I V E R S I T Y OF S O M E N A T I V E GRAPEFRUIT V A R I E T I E S (CITRUS GRANDIS) IN V I E T N A M USING S I M P L E S E Q U E N C E R E P E A T MICROSATELLITES MARKERS khuat Huu Trung^' *, Ha Trong Huy', Nguyen Truong Khoa\ Ngo Hong Binh^ Nguyen Thanh Binh', Dang Trong Luong', Le Huy Ham' 'Agricultural Genetics Institute ^Fruit & Vegetable Research Institute ^Southern Fruit Research Institute iJ SUMMARY' Citrus is native to China, Eastem India, Vietnam and Southeast Asia. The information on level of genetic diversity and origin is very important for conservation gene resource, selection and development of commercially important grapefi-uit. Thirty-five simple sequence repeat (SSRs) markers were used to detect molecular polymorphisms among 29 Citms accessions from 11 native grapefruit varieties in Vietnam. A total of 115 alleles were detected with an average of 3.29 alleles per locus; polymorphism information content (PIC) value range from 0.0 to 0.82, with an average of 0.45. All grapefruit accessions showed heterozygosity from 35.26 to 51.61%. Genetic similarity was determined using Jaccard's similarity coefficient and final dendrogram construction using a UPGMA clustering methods showed that 29 accessions were divided into 8 distinguished heterotic groups with genetic similarity from 0.32 to 1.0. The obtained results could be useftil for germplasmfingerprinting,preeminet selection and proper utilization in breeding programs. Keywords: Citrus, genetic diversity, grapefruit, microsattellite, native *Author for correspondence: Tel: 84-4-37540764; E-mail: khuathuutruns(3),vahoo.com 492