III. HOAT DONG DAY HOC 1 Kiem tra
3. Mot sd thanh tuu tao
Hogt ddng cda GV Hogt dpng cda X5
- GV nhan xet, bd sung kidn thflc.
- Neu dugc cac gian^^o
nang suat cao.
- Dai dien HS trinh bay —> ldp nhan xet.
Npi dung
- Shon gidng vi sinh
vat:
+ Tao dugc chung penicilliim cd hoat tfnh peniciliiii lang gap 200 ldn dang ban dau.
+ Chgn dugc chung vi sinh vat khdng gay benh dd san xudt vacxin. - Chgn gidng cay trdng. + Lua: Lua Mgc tuyen MTl chfn sdm, nang sudt tang 25%.
+ Ngd: DT6 -^ gay dot
bidn tr6n gidng ngd Ml. + Lac: 4329 xfl If phdng xa tia Y tr6n gidng hoa
17 cho 27 ta/ha.
+ Dau tuong: DT 84 sfl dung bdng tia Y-
+ Rau mud'ng tfl bdi cd la va than to, nang sudt tang gdp ddi.
+ Dua hdu 3n: Qua to, khdng hat, nggt.
* Nhan bidt cay tfl bdi. - Co quan sinh dudng (R6, than, la) to ban cay ludng bdi cung loai.
Hogt dpng cda GV Hogt dpng cda HS Npi dung
* cay dau tam:
- cay ludng bdi -^ cay
tfl bdi.
- cay tfl bdi lai vdi cay ludng bdi tao cay tam bdi la to.
Hogt dpng 2
TIM HIl^U TAO G I 6 N G B A N G CONG NGHfi i t B A O
Muc tieu:
- HS ndm dugc khai niem cdng nghe td bao.
- HS bidt trinh bay kT thuat nhan ban vd tfnh d ddng vat.
- HS neu dugc mdt sd thanh tuu tao gidng thuc vat cdng nghe td bao.
Hogt dpng cda GV - GV neu cau hdi:
+ Cdng nghe td bao la gi?
+ Cdng nghe td bao da mang lai lgi fch nhu thd nao?
- GV ddn ddt: Sfl dung cdng nghe td bao d dd'i tugng thuc vat va ddng vat.
- GV n6u van de dudi dang cau hdi.
Hogt dpng cda HS - HS van dung kidn thflc
de tra ldi.
+ Khai niem cdng nghe td bao.
+ Co sd: Dua tr6n tfnh toan nang cua td bao. + Cdng nghe td bao da tao dugc nhidu gidng mdi.
- HS boat ddng nhdm. + Ca nhan nghien cflu SGK muc II (1) trang 80.
+ Thao luan nhdm thdng nha't y kidn tra ldi.
Npi dung
1. Cong nghe te bao thuc vat
Hogt dpng cda GV
+ Mud'n tao nhanh ddng cay trdng thudn chung vd mdt dac diem nao dd thi ta cd the chgn bien phap nao?
+ Lam the nao khdc phuc dugc hien tugng khdng tao ra dugc con lai khac loai gifla cac loai thuc vat?
+ Cd the tao ra mdt cay mdi tfl hat phdn hay noan hay khdng?
- GV nhan xet, danh gia va bd sung kidn thflc.
Hogt dpng cda HS - Yeu cdu neu dugc:
+ Chgn nhanh gidng thudn chung cd the dung phuang phap nudi cdy md vi cac td bao ddng nha't.
+ Khdc phuc hien tugng khdng tao ra dugc con lai khac loai dung phuang phap dung hgp td bao trdn.
+ Cd thd tao cay mdi tfl hat phdn hoac noan chua thu tinh. Dai dien nhdm trinh bay —> ldp nhan xet.
Npi dung
* Nudi cay md tflng td bao thuc vat sau dd tai sinh thanh cay.
- Nhan nhanh cdc gidng cay quy.
- Tao qudn the cay trdng ddng nhdt ve kieu gen. * Lai td bao sinh dudng (Dung hgp td bao trdn)
-^ tao gidng lai khac
loai. Quy trinh:
- Loai bd thanh td bao cua td bao khac loai (td bao trdn).
Hogt dpng cda GV
- GV hdi: Ndu ban cd
mdt con chd mang kidu gen quy hidm, lam thd nao ban cd thd tao ra nhidu con chd cd kidu gen y het con chd cua ban?
- GV yeu cdu:
+ Trinh bay quy trinh nhan ban vd tfnh cflu Ddly.
Hogt dpng cda HS - HS n6u vf du:
+ Dung hgp td bao trdn d cay thudc la tao gidng cd kha nang chd'ng b6nh cao.
* Tao cay lai gifla cay ca chua va cay khoai tay. + Nudi cay hat phdn d cay lua -> tao cay ludng bdi hoan chinh.
- HS cd thd tra ldi: + Lai gidng gifla cdc con cd kidu gen quy vdi nhau..
+ Nhd nhan ban vd tfnh.
- HS nghien cflu thdng tin, hinh SGK trang 81 kdt hgp vdi cac tu lieu suu tdm.
Ndi dung
- Cho te bao trdn vao
mdi trudng dac biet -> dung hgp —> Td bao lai. - Dua td bao lai vao mdi trudng nudi cdy dac biet
-> phan chia va tdi sinh
thanh cay lai khac loai. - Nhan nhanh thanh nhidu cay.
* Nudi cdy hat phdn hay noan chua thu tinh -> cay don bdi —> cay ludng bdi.
Quy trinh:
- Td bao don bdi -> Mo don bdi.
- Md don bdi -> Gay ludng bdi hod -> Cay ludng bdi hoan chinh (kidu gen ddng hgp tfl ve cdc gen).