Breeding Lines with Multiple Resistance to both Gray Leaf Spot and Phytophthora Blight in Pepper(Capsicum annuum L.)

고추 잎점무늬병.역병 복합 저항성 계통육성

  • Published : 2000.12.31

Abstract

$F_2$ populations of the crosses KC47-1 (PI244670) ${\times}$ KCB14-2-2-3-2 (PI201234), KC220-1 ${\times}$ KC268 and $F_3$ bulk populations of the crosses KC47-1${\times}$KC263 (AC2258), KC47-1${\times}$KCB13-2-1 (PI201232), KC47-1${\times}$KCB13-4-2 (PI201232), either one parent of which was resistant to Phytophthora blight, were tested for both gray leaf spot and Phytophthora blight by serial inoculation with Stemphylium solani or a mixture of S. solani and S. lycopersici, and P. capsici in 1999. In 2000, $F_3$ and $F_4$ lines or populations developed from the respective $F_2$ or $F_3$ selections in the previous year were evaluated for resistance to both diseases. A significant progress in resistance to both diseases was achieved by selection.

1999년도에는 KC47${\times}$KCB14, KC220${\times}$KC268 조합의 $F_2$ 및 여교배 집단과 KC47-1${\times}$KC263(AC2258), KC47-1${\times}$KCB13-2-1, KC47-1${\times}$KCB13-4-2 조합의 $F_3$집단에 대하여 잎점무늬병과 역병을 차례로 접종, 복합저항성 개체를 선발하여 차세대를 육성하였다. 2000년도에는 같은 조합의 $F_3$$F_4$세대에 대하여 잎점무늬병과 역병에 대한 저항성을 검정하여 복합 저항성인 개체로부터 차세대 종자를 확보하였다. 선발세대의 경과에 따라 두 가지 병에 대한 저항성에서 현저한 진전이 관찰되었다.

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