﻿p 
  

  

  142 
  Harper: 
  Inheritanxe 
  of 
  sugar 
  

  

  expectation 
  i 
  :i, 
  but 
  from 
  the 
  third 
  plant 
  very 
  many 
  of 
  the 
  kernels 
  

   were 
  very 
  slightly 
  wrinkled 
  though 
  translucent 
  like 
  typical 
  sweet 
  

   kernels. 
  

  

  In 
  the 
  F2 
  of 
  his 
  cross, 
  R. 
  dulcis 
  sweet 
  X 
  -R. 
  vtdgata 
  flint, 
  

   Exp. 
  112, 
  in 
  which 
  four 
  plants 
  were 
  allowed 
  to 
  pollinate 
  freely 
  

  

  F 
  

  

  among 
  themselves, 
  Correns 
  reports 
  that 
  because 
  of 
  too 
  late 
  plant- 
  

   ing 
  the 
  ears 
  for 
  the 
  most 
  part 
  did 
  not 
  become 
  entirely 
  ripe. 
  

  

  In 
  Exp. 
  113, 
  {R. 
  vulgata 
  flint 
  X 
  R- 
  caerulaeodulcis 
  sweet) 
  X 
  

   R. 
  dulcis, 
  which 
  is 
  a 
  back 
  cross 
  of 
  the 
  recessive 
  parent 
  on 
  the 
  Fi 
  

   hybrid, 
  he 
  mentions 
  that 
  some 
  kernels 
  which 
  were 
  classified 
  as 
  

   sweet 
  were 
  almost 
  smooth 
  but 
  their 
  transparency 
  indicated 
  that 
  

   they 
  belonged 
  with 
  the 
  sweet 
  type. 
  For 
  Exps. 
  114, 
  115, 
  118, 
  119, 
  

   120, 
  121, 
  126, 
  127, 
  no 
  mention 
  is 
  made 
  of 
  kernels 
  intermediate 
  

   between 
  sweet 
  and 
  flint. 
  

  

  Summary 
  of 
  Correns's 
  F2 
  and 
  later 
  generations 
  

  

  107. 
  58 
  per 
  cent 
  of 
  all 
  kernels 
  intermediate. 
  

  

  108. 
  I 
  ear 
  of 
  3, 
  one 
  seventh 
  of 
  kernels 
  only 
  slightly 
  wrinkled. 
  

   109^ 
  Some 
  only 
  slightly 
  wrinkled. 
  

  

  no. 
  Doubtful 
  experiment, 
  but 
  in 
  one 
  ear 
  rather 
  many 
  kernels 
  only 
  minutely 
  

  

  wTinkled 
  or 
  almost 
  smooth, 
  

   in. 
  One 
  plant 
  of 
  three 
  gave 
  many 
  kernels, 
  slightly 
  wrinkled 
  though 
  translucent. 
  

  

  r 
  

  

  112. 
  No 
  intermediates 
  mentioned. 
  

  

  113. 
  Some 
  kernels 
  classed 
  as 
  sweet 
  were 
  almost 
  smooth. 
  

  

  114. 
  115, 
  118, 
  119, 
  120, 
  121, 
  126, 
  and 
  127. 
  No 
  mention 
  is 
  made 
  of 
  intermediates. 
  

   Fifteen 
  experiments 
  gave 
  no 
  intermediates. 
  

  

  Seven 
  experiments 
  gave 
  intermediates. 
  

  

  The 
  above 
  summary 
  of 
  Correns's 
  results 
  on 
  the 
  F2 
  and 
  later 
  

   generations 
  from 
  crosses 
  between 
  sugar 
  and 
  starch 
  races 
  shows 
  that 
  

   in 
  seven 
  out 
  of 
  fifteen 
  experiments 
  reported 
  in 
  which 
  sweet 
  kernels 
  

   were 
  expected 
  some 
  kernels 
  of 
  intermediate 
  form 
  appeared, 
  in 
  one 
  

   case 
  5.8 
  per 
  cent 
  of 
  the 
  total 
  number 
  of 
  kernels 
  were 
  intermediates. 
  

   Correns 
  in 
  no 
  way 
  attempts 
  to 
  conceal 
  this 
  result 
  but 
  treats 
  it 
  as 
  

   unimportaht. 
  He 
  regards 
  these 
  kernels 
  as 
  sweet 
  in 
  type 
  but 
  with 
  a 
  

   larger 
  air 
  cavity 
  and 
  more 
  mealy 
  (p. 
  39). 
  He 
  seems 
  not, 
  however, 
  

   to 
  have 
  selected 
  these 
  aberrant 
  kernels 
  and 
  planted 
  them^ 
  which 
  

   of 
  course, 
  as 
  he 
  so 
  frequently 
  emphasizes, 
  is 
  the 
  only 
  proper 
  test 
  

   of 
  the 
  significance 
  of 
  such 
  characteristics. 
  

  

  Correns 
  in 
  1902 
  reports 
  further 
  on 
  starch 
  and 
  sugar 
  crosses. 
  

   In 
  an 
  extensive 
  test 
  of 
  the 
  Mendelian 
  formula 
  he 
  obtained 
  lo..-^/^ 
  

  

  