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Influences of the disease
resistance conferred by the individual transgenes, Pi-d2,
Pi-d3 and Xa21, on the transgenic rice plants in yield
and grain quality
Z. N. Hao1, J.
Wang2, L. P. Wang1 and R. X. Tao1*
1Institute
of Plant Protection and Microbiology, Zhejiang Academy of
Agricultural Sciences, China.
2State
Key Laboratory of Plant Genomics & National Plant Gene
Research Centre, Institute of Genetics and Developmental
Biology, Chinese Academy of Sciences, China.
*Corresponding author. E-mail:
trxzaas@yahoo.cn.
Tel/Fax: +86 571 86404226.
Accepted
20 August, 2009 |
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To research
possible influences of the disease resistance conferred by
different trans-resistance genes on the transgenic rice
plants in their yields and grain quality, three transgenic
rice lines, including two with the resistance genes Pi-d2
and Pi-d3, respectively, for rice blast, and one
with the resistance gene Xa21 for rice bacterial
blight, which all showed the highest resistance to their
respective pathogen races, were used to analyze and measure
their respective characters in yield and grain quality as
compared to those of the transgenic control line with the
empty vector that was used to transfer Pi-d2, Pi-d3
and Xa21, respectively. Both yield and grain quality
of all three transgenic materials with the respective
trans-resistance genes decreased significantly. Grain weight
per plant of Pi-d2, Pi-d3 and Xa21 transgenic
individuals decreased by 7.7%, 29.6 and 44.4%, respectively,
compared to the control. Grain quality of Pi-d2 and Pi-d3
transgenic plants were both the third class according to the
Industrial Standard, ‘Grain Quality of Edible Rice Variety’
and one class worse than that of the control, but the third
class still belongs to edible grains. However, grain quality
of Xa21 transgenic plants was too bad to be edible.
Key
words:
Oryza sativa, resistance gene, transgenic plant,
resistance, yield, grain quality, rice blast, rice bacterial
blight. |
