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4.2 Article 6 : L e rôle d ’une l ongue co existence entre co lza et ra venelle s ur l a morphologie et les caractéristiques de populations de Raphanus raphanistrum A part les populations de Normandie citées ci-dessus, nous avons utilisé des populations de ravenelle échantillonnées en Bretagne, une région voisine, et en Bourgogne et au Danemark qui en sont géographiquement éloignées. Les caractéristiques des fleurs et des siliques ont été mesurées, et les plantes ont été cultivées ensemble dans un champ de colza ou à faible densité en cage afin de comparer leur capacité de croissance et de reproduction. Les caractéristiques mo rphologiques d es s iliques e t d es f leurs p ermettent d e discriminer les populations des quatre régions. L es populations de Normandie semblent les plus pol ymorphes m ais s e s ituent da ns l a m oyenne de l a va riabilité t otale o bservée. A ucun hybride avec l e colza n’ a é té t rouvé pour aucune de s popul ations. D es di fférences t rès significatives d e croissance et d e r eproduction o nt ét é t rouvées entre l es p lantes d es différentes r égions qua nd e lles pous saient da ns le c olza, m ais be aucoup m oins e t a vec un autre classement r elatif l orsqu’elles p oussaient en cages à p lus f aible d ensité et m ieux pollinisées par les insectes que nous apportions. Il est remarquable que les populations locales étaient les moins productives. Ces r ésultats m ontrent l a v ariabilité d es p opulations d e r avenelle. Les différences observées ne c orrespondent pa s s ystématiquement à des di stances géographiques. E lles pourraient aussi être expliquées par des introgressions, ce dont nous discutons les indices dans l’article. D ans t ous l es c as, l es popul ations de N ormandie ne s e d émarquent pa s de s a utres d’une manière particulière telle qu’une éventuelle introgression ait pu modifier leur évolution depuis 200 a ns. Il s e pour rait c ependant qu e s eules l es pl antes p ossédant d es gènes introgréssés puissent montrer des différences, ce qui est en cours d’étude. 143
Photo 4.1. Wild radish in a herbicide-resistant oilseed rape field Photo 4.2. Wild radish sampled from different regions were cultivated together in cages 144
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UNIVERSITE DE BOURGOGNE THÈSE Pour
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REMERCIEMENTS My heartfelt thanks g
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forming many of the ideas I present
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Abstract In the framework of commer
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2.3 A rticle 2: Les r étrocroiseme
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Table 3.2. Parameters of linear reg
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experiment. BC1NS is separated into
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Fig. 4.7. Mean and standard error (
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INTRODUCTION GENERALE Dans le cadre
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chapitre 1 dressant l’état des c
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CHAPTER 1 LITERATURE REVIEW ON THE
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oilseed rape and B. oleracea is ver
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populations is reduced as the dista
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into hybrids would affect the morph
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Snow e t a l. ( 1999) f ound no f i
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1.5 Consequences of introgression I
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more flowers and larger plant size
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Moreover, beside the introgression
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their parental plants. Moon et al.
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2.1 Introduction CHAPTER 2 CONDITIO
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ARTICLE 1 The effect of seed size o
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plant growth was evaluated without
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These two experiments were kept wee
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interactions were found among the t
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2006) or m ore f it t han their pa
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they b ear b eneficial t ransgenes
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Diggle PK, Abrahamson NJ, Baker RL
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Ramachandran S , B untin G D, A ll
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Table 2.2. F -values f rom a f ive-
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Days to flowering Biomass Per. of s
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2.3 Article 2: Les rétrocroisement
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Photo.2.3. S praying chlorsulfuron
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Introduction In t he f ramework o f
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eceived p ollens f rom wild B. j un
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Statistical analysis Mean values ar
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Characteristics of the backcrosses
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Table 2.7. Mean (±95% CL) of plant
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plants w ith B. napus morphology t
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Productivity of the resistant proge
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References [1] A .A. Snow, D .A. A
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insight into adaptive life-history
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CHAPTER 3 EFFETS DE LA RESISTANCE A
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3.2 A rticle 3 : S imulation d e l
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compétition et le devenir des popu
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difficult to predict. Similarly, it
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Table 3.1: ANOVA results of the eff
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Table 3.2: Parameters of linear reg
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herbivores than when exposed to Bt
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Page 99 and 100: Letourneau D .K., H agen J .A., 200
Page 101 and 102: Germination rate 0.6 0.5 0.4 0.3 0.
Page 103 and 104: 3.3 Article 4: Compétition entre p
Page 105 and 106: Introduction The invasion of transg
Page 107 and 108: Whether a popul ation w ill e volve
Page 109 and 110: while ensuring that the same ratio
Page 111 and 112: silique number, seed number, seed w
Page 113 and 114: Our ga rden e xperiments s howed t
Page 115 and 116: experiment, harsh growth conditions
Page 117 and 118: References Agrawal AA. 2004. R esis
Page 119 and 120: density- dependent c osts of vi ral
Page 121 and 122: Table 3.5. F values of the analysis
Page 123 and 124: Table 3.7. Results of Helmert contr
Page 125 and 126: Fig. 3.4. Examples of experimental
Page 127 and 128: Flowering date Seed weight Biomass
Page 129 and 130: No. viable seeds Biomass 50000 4000
Page 131 and 132: Photo 3.3. Cotton bollworm (Helicov
Page 133 and 134: Introduction Spontaneous introgress
Page 135 and 136: screening as transgenic BC2 (trBC2)
Page 137 and 138: 2002), but certain studies showed n
Page 139 and 140: Acknowledgements We t hank Z hixi T
Page 141 and 142: 92, 368-374. Rieseberg, LH, and Bur
Page 143 and 144: Table 3.10. F-values of three-way A
Page 145 and 146: Seed number Biomass 140 120 100 80
Page 147: CHAPTER 4 RECHERCHE DES CONSEQUENCE
Page 151 and 152: Introduction Plant divergence is ge
Page 153 and 154: or t he popul ation of wild r adish
Page 155 and 156: estimated. All the seeds of every h
Page 157 and 158: Field experiment Number of siliques
Page 159 and 160: aphanistrum from hybrids and R. sat
Page 161 and 162: competition diminished the differen
Page 163 and 164: Conner, J. K., Rice A. M., Stewart
Page 165 and 166: Rattenbury J A. 1962. C yclic h ybr
Page 167 and 168: Fig. 4.1. Four r egions where w ild
Page 169 and 170: Fig. 4.3. Flower phot os showing pe
Page 171 and 172: Fig. 4.5. Plot of the first two axe
Page 173 and 174: Plant weight No. of seeds per plant
Page 175 and 176: Emergence rate Plant weight No.of a
Page 177 and 178: CONCLUSION 172
Page 179 and 180: véritable s uccès ad aptatif d an
Page 181 and 182: Dans l e cas d es p remières gén
Page 183 and 184: REFERENCES Abbott RJ, Comes HP.2007
Page 185 and 186: Bing D J, D owney R K and R akow G
Page 187 and 188: carinata and Brassica rapa. Plant B
Page 189 and 190: Hybridisation within Brassica and a
Page 191 and 192: etween weedy Brassica rapa and oils
Page 193 and 194: Hybridization between oilseed rape
Page 195 and 196: Nosil P. 2008. Speciation with gene
Page 197 and 198: 32:305-32 Schadler, M., R. Brandl,
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Thalmann C, Guadagnuolo R, Felber F
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Zheng XM and Ge S. 2010. Ecological
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Therefore, after a review of the st
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more easily sieved out by harvester
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Transgenic F1 produced higher bioma
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