NDLI: Fitness cost and competitive ability of transgenic herbicide-tolerant rice expressing a protoporphyrinogen oxidase gene

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Fitness cost and competitive ability of transgenic herbicide-tolerant rice expressing a protoporphyrinogen oxidase gene

Content Provider	Semantic Scholar
Author	Chun, Young Jin Park, Kee Woong Jeong, Soon-Chun Park, Sangkyu Kim, Chang-Gi
Copyright Year	2013
Abstract	The expression of transgenic traits in genetically modified crops is sometimes associated with decreases in crop perfor- mance or fitness. These decreases in performance or fitness of transgenic plants in unfavourable conditions may provide valuable information about the ecological consequences of transgene escape. In a glasshouse trial, we tested the cost associated with resistance to herbicides by comparing the growth, yield, and competitive ability of transgenic rice with its parental non-transgenic line. This new line was developed for constitutive overexpression of protoporphyrinogen oxi- dase (PPO) to increase resistance to herbicides. We evaluated nine agronomic traits of transgenic and non-transgenic rice grown in a replacement series design over four densities. Competitive ability was also assessed between transgenic and non-transgenic plants by analyzing their relative yields based on biomass and seed weight data. Our results indicated that non-transgenic plants showed greater performance than did the transgenic plants when those genotypes were grown in mixtures. The non-transgenic rice plants exhibited superior competitive ability at certain combinations of planting densities and genotype proportions. These results suggest that PPO-herbicide resistance incurs some costs in plant per- formance and competitive ability.
Starting Page	39
Ending Page	47
Page Count	9
File Format	PDF HTM / HTML
DOI	10.5141/ecoenv.2013.005
Volume Number	36
Alternate Webpage(s)	http://www.ecosk.org/board/Pds/Board/pub_01/05_VOL_36_NO1_2013_04_02.pdf
Alternate Webpage(s)	http://ocean.kisti.re.kr/downfile/volume/kesk/STHHCL/2013/v36n1/STHHCL_2013_v36n1_39.pdf
Alternate Webpage(s)	https://doi.org/10.5141/ecoenv.2013.005
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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