﻿150 
  Harper: 
  Inheritanxe 
  of 
  sugar 
  

  

  White 
  

  

  wrinkled 
  tip 
  

  

  typically 
  seen 
  in 
  dents. 
  The 
  kernels 
  frequently 
  show 
  only 
  a 
  

  

  m 
  

  

  the 
  tip, 
  leaving 
  less 
  of 
  the 
  opaque 
  white 
  endosperm. 
  These 
  

   kernels 
  with 
  less 
  wrinkled 
  tips 
  have 
  been 
  called 
  dimpled 
  dents. 
  

   They 
  are 
  well 
  shown 
  in 
  the 
  Fig. 
  130/ 
  and 
  as 
  noted 
  the 
  dent 
  kernels 
  

   of 
  this 
  ear 
  represent 
  the 
  dimpled 
  dent 
  kernels 
  of 
  the 
  original 
  

   starchy 
  parent. 
  They 
  occur 
  in 
  the 
  inbred 
  ears 
  but 
  become 
  much 
  

  

  numerous 
  in 
  the 
  crosses 
  with 
  sweets. 
  As 
  in 
  most 
  dents 
  the 
  

  

  more 
  

  

  kernels 
  at 
  the 
  butt 
  and 
  tip 
  of 
  the 
  ear 
  tend 
  to 
  pass 
  over 
  into 
  the 
  

   dimpled 
  form 
  or 
  even 
  to 
  be 
  quite 
  smooth 
  and 
  flint-like, 
  though 
  

   generally 
  showing 
  more 
  or 
  less 
  opaque 
  endosperm. 
  

  

  I 
  have' 
  not 
  employed 
  field 
  tests 
  on 
  a 
  large 
  scale 
  in 
  my 
  studies 
  

   but 
  have 
  endeavored 
  to 
  use 
  all 
  the 
  precautions 
  for 
  careful 
  control 
  

   in 
  pollination 
  with 
  relatively 
  small 
  numbers 
  of 
  plants. 
  I 
  have 
  

   used 
  both 
  the 
  method 
  of 
  bagging 
  the 
  ears 
  and 
  tassels 
  separately 
  

   and 
  transferring 
  the 
  pollen 
  by 
  hand, 
  and 
  the 
  method 
  of 
  connecting 
  

   tassel 
  and 
  ear 
  by 
  a 
  paper 
  tube 
  and 
  allowing 
  the 
  pollen 
  to 
  reach 
  

   the 
  silk 
  directly. 
  In 
  spite 
  of 
  the 
  fact 
  that 
  only 
  one 
  crop 
  per 
  year 
  

   can 
  be 
  obtained, 
  the 
  large 
  numbers 
  of 
  kernels 
  on 
  an 
  ear, 
  all 
  pro- 
  

   duced 
  under 
  quite 
  similar 
  conditions, 
  and 
  the 
  possibility 
  of 
  checking 
  

   up 
  results 
  year 
  after 
  year 
  on 
  the 
  preserved 
  material 
  in 
  a 
  fashion 
  

   quite 
  impossible 
  with 
  flower 
  colors, 
  etc., 
  make 
  corn 
  a 
  favorable 
  

   material 
  for 
  such 
  studies 
  on 
  the 
  variation 
  of 
  characters, 
  etc. 
  

  

  As 
  noted 
  above, 
  there 
  is 
  general 
  agreement 
  as 
  to 
  the 
  occurrence 
  

   of 
  intermediates 
  between 
  sugary 
  and 
  starchy 
  kernels. 
  I 
  shall 
  

   report 
  particularly 
  the 
  numbers 
  in 
  which 
  these 
  intermediate 
  

   kernels 
  occur 
  in 
  the 
  successive 
  generations 
  and 
  their 
  behavior 
  

   when 
  grown 
  and 
  selfed. 
  

  

  I 
  have 
  carried 
  the 
  cross 
  between 
  Wisconsin 
  White 
  Dent 
  and 
  

   Black 
  Mexican 
  Sweet, 
  both 
  obtained 
  from 
  Thorburn, 
  through 
  four 
  

   generations, 
  from 
  1912-1916 
  and 
  will 
  give 
  my 
  results 
  with 
  this 
  

   series 
  in 
  some 
  detail 
  as 
  noted, 
  since 
  they 
  are 
  illustrative 
  of 
  all 
  

   my 
  results 
  in 
  crossing 
  sweet 
  and 
  flint 
  or 
  dent 
  types. 
  The 
  tassels 
  

   and 
  ears 
  were 
  bagged 
  separately 
  for 
  the 
  most 
  part 
  though 
  in 
  some 
  

   cases 
  they 
  were 
  connected 
  directly 
  by 
  paper 
  tubes. 
  

  

  Three 
  ears, 
  5 
  a, 
  5 
  &, 
  and 
  5 
  c, 
  were 
  obtained 
  in 
  191 
  2 
  by 
  polli- 
  

   nating 
  the 
  Wisconsin 
  White 
  Dent 
  with 
  pollen 
  from 
  the 
  Black 
  

  

  