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Author Zheng,X.M. and Ge,S.
Title Ecological divergence in the presence of gene flow in two closely related Oryza species (Oryza rufipogon and O. nivara)
Abstract:
Ecological divergence plays a prominent role in the process of speciation, but how divergence occurs in the face of gene flow is still less clear, and remains controversial among evolutionists. Here we investigated the nucleotide diversity, divergence and gene flow between Oryza nivara and O. rufipogon using sequences of seven chloroplast and nuclear loci. By analysing samples from 26 wild populations across the geographic ranges of the two species, we showed that both species were highly structured and O. rufipogon maintained a higher level of species-wide diversity than O. nivara. Notably, phylogenetic, amova and FST analyses were unable to detect significant nucleotide differentiation between the two species. We estimated that the two species began to diverge at c. 0.16 million years ago. Our coalescent-based simulations strongly rejected the simple isolation model of zero migration between species, but rather provided unambiguous evidence of bidirectional gene flow between species, particularly from O. rufipogon to O. nivara. Our simulations also indicated that gene flow was recurrent during the divergence process rather than arising from secondary contact after allopatric divergence. In conjunction with different morphological and life-history traits and habitat preference in the two species, this study supports the hypothesis that these Oryza species are better treated as ecotypes that diverged quite recently and are still under the process of divergence. Importantly, we demonstrate the ecological divergence between O. rufipogon and O. nivara in the presence of significant gene flow, implying that natural selection plays a primary role in driving the divergence of the two Oryza species.
Journal Mol. Ecol.
Country China
Volume 19(12)
Pages 2439-2454
Year 2010
PubMed ID 20653085
PubMed Central ID -
DOI 10.1111/j.1365-294X.2010.04674.x
URL -
Relation
Gene HD3A KS1 LHS1 SSIIC WX1
INSD GU727019 GU727020 GU727021 GU727022 GU727023 GU727024 GU727025 GU727026 GU727027 GU727028 GU727029 GU727030 GU727031 GU727032 GU727033 GU727034 GU727035 GU727036 GU727037 GU727038 GU727039 GU727040 GU727041 GU727042 GU727043 GU727044 GU727045 GU727046 GU727047 GU727048 GU727049 GU727050 GU727051 GU727052 GU727053 GU727054 GU727055 GU727056 GU727057 GU727058 GU727059 GU727060 GU727061 GU727062 GU727063 GU727064 GU727065 GU727066 GU727067 GU727068 GU727069 GU727070 GU727071 GU727072 GU727073 GU727074 GU727075 GU727076 GU727077 GU727078 GU727079 GU727080 GU727081 GU727082 GU727083 GU727084 GU727085 GU727086 GU727087 GU727088 GU727089 GU727090 GU727091 GU727092 GU727093 GU727094 GU727095 GU727096 GU727097 GU727098 GU727099 GU727100 GU727101 GU727102 GU727103 GU727104 GU727105 GU727106 GU727107 GU727108 GU727109 GU727110 GU727111 GU727112 GU727113 GU727114 GU727115 GU727116 GU727117 GU727118 GU727119 GU727120 GU727121 GU727122 GU727123 GU727124 GU727125 GU727126 GU727127 GU727128 GU727129 GU727130 GU727131 GU727132 GU727133 GU727134 GU727135 GU727136 GU727137 GU727138 GU727139 GU727140 GU727141 GU727142 GU727143 GU727144 GU727145 GU727146 GU727147 GU727148 GU727149 GU727150 GU727151 GU727152 GU727153 GU727154 GU727155 GU727156 GU727157 GU727158 GU727159 GU727160 GU727161 GU727162 GU727163 GU727164 GU727165 GU727166 GU727167 GU727168 GU727169 GU727170 GU727171 GU727172 GU727173 GU727174 GU727175 GU727176 GU727177 GU727178 GU727179 GU727180 GU727181 GU727182 GU727183 GU727184 GU727185 GU727186 GU727187 GU727188 GU727189 GU727190 GU727191 GU727192 GU727193 GU727194 GU727195 GU727196 GU727197 GU727198 GU727199 GU727200 GU727201 GU727202 GU727203 GU727204 GU727205 GU727206 GU727207 GU727208 GU727209 GU727210 GU727211 GU727212 GU727213 GU727214 GU727215 GU727216 GU727217 GU727218 GU727219 GU727220 GU727221 GU727222 GU727223 GU727224 GU727225 GU727226 GU727227 GU727228 GU727229 GU727230 GU727231 GU727232 GU727233 GU727234 GU727235 GU727236 GU727237 GU727238 GU727239 GU727240 GU727241 GU727242 GU727243 GU727244 GU727245 GU727246 GU727247 GU727248 GU727249 GU727250 GU727251 GU727252 GU727253 GU727254 GU727255 GU727256 GU727257 GU727258 GU727259 GU727260 GU727261 GU727262 GU727263 GU727264 GU727265 GU727266 GU727267 GU727268 GU727269 GU727270 GU727271 GU727272 GU727274 GU727275 GU727276 GU727277 GU727278 GU727279 GU727280 GU727281 GU727282 GU727283 GU727284 GU727285 GU727286 GU727287 GU727288 GU727289 GU727290 GU727291 GU727292 GU727293 GU727294 GU727295 GU727296 GU727297 GU727298 GU727299 GU727300 GU727301 GU727302 GU727303 GU727304 GU727305 GU727306 GU727307 GU727308 GU727273 GU727015 GU727016 GU727017 GU727018
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain 		-
Stages in Each Organ
- Muant Lines (Gene) 		-
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase