Phân tích khả năng phối hợp của bộ giống đậu nành bằng phương pháp lai Dialen

KHOA Hpc C6N G NGHl

PHAM TICH KHA IXIAIVG PHOI HOP CUA BO

GidlMG DAU IMAIMH BAIVG PHUOIMG PHAP LAI DIALEIM

Nguydn Thuy Kidu Tidn\ V5 Thanh ToinS Nguydn Thj LangS Biii Chi Bihi^

. T6MTAT

Bay gidng dau nanh dupe chpn tao lam vat lieu lai nhu: OMDNl, OMDN29, OMDN109, OMDNllO, MTD

176 va Nam Vang. Thi nghiem dupe thiet ke kieu lai luan phien. Cay the he Fl va bd me dupe danh gia voi

cac tinh trang nhu: thoi gian sinh trudng, nang suat va thanh phan nang suat Gia tri thiet lap co y nghia

tren cac tinh trang nhu: chieu cao cay cua cac gidng MTD 176, OMDN 110; ngay tro hoa nhu OMDN 29,

OMDN 110; sd qua tren canh nhu gidng MTD 176, Nam Vang va nang suat qua nhu hai gidng: MTD 176,

Nam Vang. Ti le 2GCA / (2GCA-I-SCA) cho nang suat hat la cong tinh va khong cpng tinh gan nhu ngang

nhau.

Tir khoa.- Dau nanh, kha nang phd: hop ehung, kha nang phdi hop rieng.

LOATVANDE

Dau ninh hay edn gpi li dau tuong {Glycine Max

(L) Merrill=glycine soja sieb et Zucc) la ciy cdng

nghiep ngin ngiy, dd trdng, cd gii tri dinh duong vi

gii tri kinh te eao. Vdi xu the chuyen ddi co eau ciy

trdng hidn nay, vide dua ciy miu vio he thdng luin

canh vdi liia li mdt dieu can thief, trong dd dau ninh

li ciy cd vai ttd quan trpng trong vide cai tao dat, ning

cao hidu qua kinh td, ting thu nhip cho ngudi din.

Nhu eau san xuat dau ninh cho vimg ddng bing sdng

Cuu Long (DBSCL) trong nhiing nim gan day ting

ldn rat ding ke. Gidng li mdt trong nhirng yeu td quan

ttpng hing dau ttong vide ning eao ning suat vi sin

lupng ciy ttong. Trong qua ttinh chpn tao gidng thi

kha ning phdi hpp eua mdt gidng ciy trdng niy vdi

mdt gidng khie ed thd ehiu tie ddng bdi: eic gien

duong (posittve genes), su ttjong tic cd thd duoc tao

ra giira eic gien giira hai gidng cha me li quan ttpng

(Lang, 1992). Do vay de tii niy tap trung nghien ciru

van dung ngudn gien mdi vio chuong trinh lai tao

gidng dau nanh tai ddng bing sdng Ciru Long thdng

qua phin tich lai dialen.

L VAT UEU VA PHUONG PHAP

1. Vit Udu

7 gidng dau ninh dupx; dem dinh gii kha ning

phdi hpp ed sin trong ngin hing gidng ciia Vidn Lua

DBSCL, Thdi Lai. Can Tho (bang 1).

Vat lieu nghidn ciru trong phan niy gdm eic ciy

lai cua cic td hpp me bd di dupx: tao ra d cic vu lai tir

nim 2007 thue hidn tai Vidn Nghidn ciiu Lua DBSCL.

Cic miu gidng dau ninh dupe su dung lim bd dd lai

vdi eae gidng ed ning suat eao vi ed khi ning dau

trii eao. Cie mau gidng dau di dupe chpn lpe dua

' Vi?n lua DBSCL

^ Vi?n Khoa hpc ky thu^t ndng nghi?p mien Nam

trdn sinh trudng vi ning suat cao theo ket qui dinh

gii trude diy vi di dupe trdng.

2. Dja di^m

Thi nghidm dupe tien hinh tai nha ludi, phdng

thi nghidm vi khu canh tic ngoii ddng cua Vidn Lua

DBSCL, Thdi Lai, Can Tho.

3. Phuong phip

Lai dialen

Trdng cie gidng bd me trong nhi ludi vi tien

hinh lai dialen, nhung ehi theo hudng thuan. Sd td

hpp lai can tien hanh li: n = p(p -1)/2

Vdi n li sd td hpp lai, p li sd bd me dem lai.

Theo phuong phip Griffing Model 1, Method 2:

Md hinh toin hpe dd phin tich khi ning phdi hpp

dupe gia dinh li: Gifting

Xg = u -H gi -h gj -I- s^ -h 1/bc* Ilcgw

Trong dd: u = Trung bmh quan tiid; i, j = 1 p

(bd me); k = 1,..., b (khdi); 1 = 1,..., c (ci tiid tt-dn mdi

Id); g„ gj = Anh hudng kha ning phdi hpp ehung;

Sjj = Anh hudng kha ning phdi hpp ridng; ^^^ = Anh

hudng ridng bidt ddi vdi ci the quan sat thii ijkl.

Kha ning phdi hpp ehung: o \ + Q\ -H (n -H 2) * a\

Kha ning phdi hpp ridng: a\ + a\

Khi ning phdi hpp ehung eua tting gidng:

1 2

&=—[I(Y,+Y^--Y.. ]

n - 2 n

Kha ning phdi hpp ehung eua tting td hpp lai￾1 2

Sii = Y,—(Y,.-Y, + Y., + Y^+ Y.,

" + 2 (n + l)(n + 2)

Phuong sai:

Var(gj = [(n-l)a2Xn-f-2)]

Var(s^^ = [2(n - l)oV(n-t-l)(n-^ 2)1

70 NONG NGHllP VA PHAT TRIEN NONG THON - KY 2 - THANG 6/2011