Crossbreeding of cry1Ac/bar Transgenic Progeny with a Non-transgenic Elite Rice Cultivar for Minimizing the Underlying Grain Cost of Bt Transgenic Rice

• 발행기관: 한국육종학회
• 저자명: Mi-Ok Woo Jin-Hyoung Lee Seonghyu Shin Kong-Sik Shin Hee-Jong Koh Seok-Cheol Suh
• 간행물 정보: 『Plant breeding and biotechnology』Vol.3 No.1, 21~29쪽, 전체 9쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2015.03.01

영문 초록

Most Bt transgenic rice events have an underlying grain cost depending on the insect pressure in the field. This study was conducted (1) to determine if the cry1Ac/bar genetically modified (GM) rice (designated Agb0101) based on a Korean japonica rice cultivar has any underlying grain cost and (2) to develop cry1Ac/bar GM rice lines with yield performance similar to those of Korean elite cultivars via crossbreeding. A three-year field experiment showed that Agb0101 had a high underlying grain cost equivalent to 18% grain yield loss, and this cost was mainly due to the grain number per panicle. Moreover, it was found that the cry1Ac/bar transgene was inherited as a single dominant gene. BC1F4―F5 crossbred progeny derived from an anther culture of Agb0101―showed phenotypic resemblance to non-transgenic Korean elite cultivars, resulting in a decrease in the grain yield cost of Agb0101 from 27% to 10%. These results suggest that Bt-GM rice-oriented cross-fertilization with a non-GM elite cultivar followed by two- or threefold selection is a feasible method to minimize or remove the underlying grain cost of the Bt transgenic insect-resistant rice line.

목차

INTRODUCTION

MATERIALS AND METHODS

RESULTS

DISCUSSION

ACKNOWLEDGMENTS

REFERENCES

키워드

cry1Ac Bt transgenic rice Underlying grain cost Crossbreeding