Asynchronous flowering was noted in a recently discovered infestation of siam weed in
north Queensland. This may indicate some genetic diversity in the infestation, increasing concerns
about the origin of the infestation. Internal transcribed spacer 1 (ITS1) sequence data were obtained
for siam weed individuals from north Queensland, Indonesia, Thailand, South Africa, Ivory Coast,
Brazil, Colombia, and the U.S. The ITS1 region is 258 base pairs long, and the populations that
flower at different times in north Queensland differ by four base substitutions. The genotype common
in north Queensland is also reported throughout the native and introduced ranges. The other genotype
is reported only in north Queensland and southern Brazil. These data, in conjunction with prior
investigations into possible origins, indicate that Brazil is the most likely source of the infestation
in Australia.
Asynchronous flowering was noted in a recently discovered infestation of siam weed in
north Queensland. This may indicate some genetic diversity in the infestation, increasing concerns
about the origin of the infestation. Internal transcribed spacer 1 (ITS1) sequence data were obtained
for siam weed individuals from north Queensland, Indonesia, Thailand, South Africa, Ivory Coast,
Brazil, Colombia, and the U.S. The ITS1 region is 258 base pairs long, and the populations that
flower at different times in north Queensland differ by four base substitutions. The genotype common
in north Queensland is also reported throughout the native and introduced ranges. The other genotype
is reported only in north Queensland and southern Brazil. These data, in conjunction with prior
investigations into possible origins, indicate that Brazil is the most likely source of the infestation
in Australia.
การแปล กรุณารอสักครู่..
