Hayes and Garber - Cucurbit Breeding

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152 BREEDING CROP PLANTS isolated that matured a month earlier than either parent. This promising strain called Osceola has found considerable favor in the south. Another segregate, a variety called Wakulla, obtained from the same cross, matures in approximately 120 days. This strain has an undesirable character in that it shatters its seed when ripe. The material available furnishes an opportunity to obtain further improvement by crossing and selections.
CHAPTER XII FLAX AND TOBACCO FLAX Flax has been reported to have been grown by the Lake Dwellers of Switzerland as early as 4,000 to 2,000 years B.C. (Chapter I). Although the Egyptians and Hebrews used flax to make clothing in very ancient times, little is known of the origin of our present cultivated varieties. Species Crosses. Tammes (1911, 1915, 1916) has made some interesting genetic studies of flax species crosses. Reciprocal crosses were made between cultivated varieties of Linum usitatissimum and the wild species L. perenne, austriacum, narbonnenese, grandifiorum, and angustifolium. No seeds capable of germinating were obtained except in the angustifolium cross. This was considered a good cause for believing thatL. angustifolium has the best right of any of the wild species to be considered the ancestral form of cultivated flax. This wild species differs from the common cultivated varieties in that the seeds and capsules are smaller, the edges of the partition walls of the capsule are hairy, and the capsules open at maturity. In general, crosses between hairy and glabrous races showed dominance of the hairy condition in FI and a segregation of 3 hairy to 1 glabrous in F The 2 open type of capsule . was imperfectly dominant in FI, i.e., the capsules did not open as widely as in the open parent. Segregation occurred in F z . Parental types, i.e., homozygous open and homozygous closed lines, were produced in later generations. Three or four factors were necessary to explain results. Interrelation of Factors for Flower and Seed-Colors. Careful studies have been made of the interrelation in inheritance of various flax characters (Tammes 1911, 1914, 1915, 1916). The results were carefully analyzed. Three factors called A, B, and C, were shown to be necessary for the production of dark blue flowers. B and C together produce light blue flowers, and A is an intensification factor which in the presence of B and C produces dark blue flowers. When C is homozygous in the presence of B, the petal. the veins of the petal are darker than the rest of The veins are the same color as the rest of the petal when C is heterozygous in the presence of B, B and A give the 153
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AGRICULTURAL AND BIOLOGICAL PUBLICA
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s'g S 2 ! o s s
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COPYRIGHT, 1921, BY THE McGRAW-HiLL
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PREFACE Since the early development
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. Early CONTENTS CHAPTER I INTRODUC
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CONTENTS xiii PAGE Color of grain a
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CONTENTS XV PAGE Sorghum 178 Origin
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CONTENTS xvn CHAPTER XIX FARMERS' M
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2 BREEDING CROP PLANTS times by pri
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4 BREEDING CROP PLANTS "In the vege
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6 BREEDING CROP PLANTS more attenti
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8 BREEDL\C CROP PLANTS by one of it
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10 BREEDING CROP PLANTS 1. Variabil
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12 BREEDING CROP PLANTS bud sports
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14 BREEDING CROP PLANTS who gives t
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* CHAPTER II PLANT GENETICS 1 Since
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18 BREEDING CROP PLANTS pair being
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20 BREEDING CROP PLANTS The Inherit
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22 BREEDING CROP PLANTS which are n
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24 BREEDING CROP PLANTS There is a
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26 BREEDING CROP PLANTS and Pr. let
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! 28 BREEDING CROP PLANTS The gener
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30 BREEDING CROP PLANTS intermediat
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32 BREEDING CROP PLANTS a conceptio
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34 BREEDING CROP PLANT* Group 4. Ve
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36 BREEDING CROP PLANTS crosses. Sm
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38 BREEDING CROP PLANTS mas protrud
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40 BREEDING CROP PLANTS between the
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Average 42 BREEDING CROP PLANTS tob
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44 BREEDING CROP PLANTS same for th
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46 BREEDING CROP PLANTS order to il
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48 BREEDING CROP PLANTS existence i
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50 BREEDING CROP PLANTS basis of do
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52 BREEDING CROP PLANTS certain con
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54 BREEDING CROP PLANTS for the pur
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56 BREEDING CROP PLANTS four plots.
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58 BREEDING CROP PLANTS TABLE XI. T
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60 BREEDING CROP PLANTS series then
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62 BREEDING CROP PLANTS central row
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64 BREEDING CROP PLANTS nating rows
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66 BREEDING CROP PLANTS The groupin
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68 BREEDING CROP PLANTS Two men may
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70 BREEDING CROP PLANTS A common pr
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72 BREEDING CROP PLANTS method (1),
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74 BREEDING CROP PLANTS flowers whi
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76 BREEDING CROP PLANTS Classificat
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78 BREEDING CROP PLANTS crosses bet
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80 BREEDING CROP PLANTS and those f
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82 BREEDING CROP PLANTS generation
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84 BREEDING CROP PLANTS nuclei, the
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86 BREEDING CROP PLANTS crosses bet
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88 BREEDING CROP PLANTS The Howards
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90 BREEDING CROP PLANTS CC. Lemma w
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92 BREEDING CROP PLANTS development
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94 BREEDING CROP PLANTS grains on h
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96 BREEDING CROP PLANTS susceptibil
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98 BREEDING CROP PLANTS gous forms
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100 BREEDING CROP PLANTS was though
Page 126 and 127: 102 BREEDING CROP PLANTS mediates b
Page 128 and 129: 104 BREEDING CROP PLANTS crosses ha
Page 130 and 131: 106 BREEDING CROP PLANTS Wild rye,
Page 132 and 133: 108 BREEDING CROP PLANTS same plant
Page 134 and 135: 110 BREEDING CROP PLANTS Time of cu
Page 136 and 137: 112 KREEDINd CHOP PLANTS variety te
Page 138 and 139: 114 BREEDING CROP PLANTS Selection.
Page 140 and 141: 116 BREEDING CROP PLANTS of selecti
Page 142 and 143: CHAPTER IX SOME RESULTS OF SELECTIO
Page 144 and 145: 120 BREEDING CROP PLANTS Briefly, i
Page 146 and 147: 122 BREEDING CROP PLANTS In the abo
Page 148 and 149: 124 BREEDING CROP PLANTS correlatio
Page 150 and 151: 126 BREEDING CROP PLANTS likewise s
Page 152 and 153: 128 BREEDING CROP PLANTS WHEAT SELE
Page 154 and 155: 130 BREEDING CROP PLANTS TABLE XXVI
Page 156 and 157: CHAPTER X SOME RESULTS OF CROSSING
Page 158 and 159: 134 BREEDING CROP PLANTS A Wheat Cr
Page 160 and 161: 136 BREEDING CROP PLANTS Among othe
Page 162 and 163: 138 BREEDING CROP PLANTS some of th
Page 164 and 165: 140 BREEDING CROP PLANTS to quality
Page 166 and 167: 142 BREEDING CROP PLANTS index is o
Page 168 and 169: 144 BREEDING CROP PLANTS Factor sys
Page 170 and 171: 146 BREEDING CROP PLANTS Later more
Page 172 and 173: 148 BREEDING CROP PLANTS Parents Co
Page 174 and 175: 150 BREEDING CROP PLANTS The Lyon b
Page 178 and 179: 154 BREEDING CROP PLANTS 4 FIG, 34.
Page 180 and 181: 156 BREEDING CROP PLANTS same resul
Page 182 and 183: 158 BREEDING CROP PLANTS grown for
Page 184 and 185: 160 BREEDING CROP PLANTS longer tha
Page 186 and 187: 162 BREEDING CROP PLANTS with the p
Page 188 and 189: 164 BREEDING CROP PLANTS "4. When a
Page 190 and 191: 166 BREEDING CROP PLANTS variabilit
Page 192 and 193: 168 BREEDING CROP PLANTS 1910 to 19
Page 194 and 195: 170 BREEDING CROP PLANTS
Page 196 and 197: 172 BREEDING CROP PLANTS normal var
Page 198 and 199: 174 BREEDING CROP PLANTS branching
Page 200 and 201: 176 BREEDING CROP PLANTS hybrid seg
Page 202 and 203: 178 BREEDING CROP PLANT* which are
Page 204 and 205: 180 BREEDING CROP PLANTS the settin
Page 206 and 207: 182 BREEDING CROP PLANTS organs. Th
Page 208 and 209: 184 BREEDING CROP PLANTS Xenia may
Page 210 and 211: 186 BREEDING CROP PLANTS manner as
Page 212 and 213: 188 BREEDING CROP PLANTS to a singl
Page 214 and 215: 190 BREEDING CROP PLANTS pure race
Page 216 and 217: 192 BREEDING CROP PLANTS Studies of
Page 218 and 219: 194 BREEDING CROP PLANTS B. RESULT
Page 220 and 221: 196 BREEDING CROP PLANTS corn and g
Page 222 and 223: 198 BREEDING CROP PLANTS TABLE XLV.
Page 224 and 225: 200 BREEDING CROP PLANTS system of
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202 BREEDING CROP PLANTS Kempton we
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204 BREEDING CROP PLANTS general ru
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206 BREEDING CHOP PLANTS abnormalit
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208 BREEDING CROP PLANTS sis), Cana
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210 BREEDING CROP PLANTS plant sele
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212 BREEDING CROP PLANTS The practi
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214 BREEDING CROP PLANTS TABLE LIII
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216 BREEDING CROP PLANTS belong to
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218 BREEDING CROP PLANTS correlatio
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220 BREEDING CROP PLANTS approached
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222 BREEDING CROP PLANTS P. Segrega
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224 BREEDING CROP PLANTS 1. The het
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226 BREEDING CROP PLANTS TABLE LV.
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228 BREEDING CROP PLANTS These earl
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230 BREEDING CROP PLANTS For the 16
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232 BREEDING CROP PLANTS variety ca
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CHAPTER XVII BREEDING OF VEGETABLES
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236 BREEDING CROP PLANTS not known,
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238 BREEDING CROP PLANTS Le = long
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240 BREEDING CROP PLANTS TABLE LXI.
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242 BREEDING CROP PLANTS shell bean
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244 BREEDING CROP PLANTS data on th
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246 BREEDING CROP PLANTS TABLE LXII
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248 BREEDING CROP PLANTS need not b
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250 BREEDING CROP PLANTS radish pla
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252 BREEDING CROP PLANTS kohl-rabi.
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254 BREEDING CROP PLANTS TABLE LXV.
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256 BREEDING CROP PLANTS nucleus of
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258 BREEDING CROP PLANTS These data
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260 BREEDING CROP PLANTS recommende
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262 BREEDING CROP PLANTS varieties
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264 BREEDING CROP PLANTS TABLE LXVI
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266 BREEDING CROP PLANTS probably a
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268 BREEDING CROP PLANTS condition
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270 BREEDING CROP PLANTS very notic
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272 BREEDING CROP PLANTS these vari
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274 BREEDING CROP PLANTS bud sports
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The 276 BREEDING CROP PLANTS Stewar
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278 BREEDING CROP PLANTS made and 4
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280 BREEDING CROP PLANTS 1. A knowl
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282 BREEDING CROP PLANTS WHAT IS GO
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284 BREEDING CROP PLANTS METHODS OF
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286 BREEDING CROP PLANTS The seed p
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288 BREEDING CROP PLANTS report of
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290 BREEDING CROP PLANTS 5. Give sp
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292 BREEDING CROP PLANTS First Year
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DEFINITIONS 1 Acquired Character. A
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296 BREEDING CROP PLANTS Heredity.
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298 BREEDING CROP PLANTS Replicatio
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300 BREEDING CROP PLANTS BALLS, W.
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302 BREEDING CROP PLANTS CUMMINGS,
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304 BREEDING CROP PLANTS FRANDSEN,
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306 BREEDING CROP PLANTS HARRIS, J.
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308 BREEDING CROP PLANTS 1912. On t
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310 BREEDING CROP PLANTS LEAKE H. M
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312 BREEDING CROP PLANTS NILSSON-EH
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314 BREEDING CROP PLANTS RUSSELL, H
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316 BREEDING CROP PLANTS 1915. Die
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318 BREEDING CROP. PLANTS 1918. Inh
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320 INDEX Breeding, cotton, 177 cuc
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322 INDEX ( iaincs, disease resista
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324 INDEX Le Couteur, selection, sm
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326 INDEX Ray, species, first use o
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328 INDEX Wheat, artificial crossin
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Hayes and Garber - Cucurbit Breeding

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