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抗嘉磷塞雜草之變異與鑑定

83

制有

3

種以上,包括藥劑於植體吸收及傳

導阻礙、

EPSPS

基因增幅及

EPSPS

酵素含

量增加、

EPSPS

轉錄速率增加有關

(18, 19, 20,

26, 27, 33, 34, 36)

。由於抗性繖花龍吐珠

EPSPS

性對嘉磷塞的耐受性結果,本研究再進一

步針對繖花龍吐珠

EPSPS

核酸序列進行解

圖八、利用

PCR-RFLP

技術鑑定

11

個臺灣南部繖花龍吐珠生物型。

(A)

利用

EPSPS-D1/

EPSPS-D2

引子組增幅抗性生物型

(R) 495 bp

,經

Hae

III

限制酶反應,於感性生物型

(S)

可切割為

163

332 bp

二核酸片段。

(B)

2

5

8

10

欄為抗性生物型──

高雄市鳳山市

(KH2)

、燕巢區

(KH5)

、屏東縣里港鄉

(PT1)

及春日鄉

(PT3)

樣品。

Fig. 8.

PCR-RFLP identification of 11 field populations of

Hedyotis corymbosa

from southern

Taiwan. (A) EPSPS-D1/EPSPS-D2 primers were used to amplify 495 bp fragments of

glyphosate-resistant (R) and glyphosate-susceptible (S) EPSPS, but only EPSPS from S

biotypes showedn the restriction-banding pattern that is characteristic of the amplified

fragments with

Hae

III. (B) Lines 2, 5, 8, and 10 show EPSPS from glyphosate-resistant

biotypes KH2, KH5, PT1 and PT3, respectively.