﻿AND 
  

  

  145 
  

  

  It 
  

  

  t( 
  

  

  point 
  from 
  their 
  own 
  work. 
  East 
  and 
  Hayes 
  believe 
  (p. 
  42) 
  that 
  

   these 
  Intermediates 
  are 
  not 
  an 
  evidence 
  of 
  the 
  mixing 
  of 
  the 
  sweet 
  

   and 
  starch 
  characters 
  but 
  are 
  due 
  to 
  progressive 
  variations 
  con- 
  

   stantly 
  taking 
  place 
  in 
  small 
  number 
  along 
  paths 
  that 
  have 
  been 
  

   passed 
  before, 
  and 
  assert 
  like 
  Correns 
  the 
  dominance 
  of 
  the 
  starch 
  

   character 
  over 
  the 
  sweet 
  character, 
  regarding 
  the 
  behavior 
  of 
  the 
  

   two 
  characters 
  as 
  an 
  example 
  of 
  a 
  simple 
  Mendelian 
  monohybrid. 
  

   I 
  have 
  reviewed 
  the 
  work 
  of 
  Correns 
  and 
  East 
  in 
  some 
  detail 
  

   on 
  this 
  point 
  to 
  show 
  that 
  from 
  the 
  first 
  the 
  ocurrence 
  of 
  such 
  

   intermediates 
  constituting 
  exceptions 
  to 
  the 
  simple 
  formula 
  for 
  a 
  

   Mendelian 
  monohybrid 
  were 
  observed 
  though 
  they 
  were 
  regarded 
  

   as 
  unimportant 
  from 
  the 
  theoretic 
  standpoint. 
  In 
  spite 
  of 
  these 
  

  

  r 
  

  

  observed 
  cases 
  of 
  intermediates 
  the 
  combination 
  of 
  sweet 
  with 
  

   starch 
  corns 
  is 
  made 
  a 
  standard 
  type 
  to 
  illustrate 
  Mendelian 
  

   behavior 
  in 
  such 
  summaries 
  and 
  general 
  discussions 
  as 
  Correns's 
  

  

  Die 
  neuen 
  Vererbungs-Gesetze 
  " 
  ('12); 
  Baur's 
  "Einfuhrung 
  in 
  

   die 
  experimentelle 
  Vererbungslehre," 
  2d 
  edition 
  ('14); 
  Haecker's 
  

  

  Allgemeine 
  Vererbungslehre 
  " 
  ('11); 
  and 
  even 
  the 
  new 
  manual, 
  

   ''Genetics 
  in 
  Relation 
  to 
  Agriculture," 
  by 
  Babcock 
  and 
  Claussen 
  

   C18). 
  

  

  It 
  is 
  highly 
  desirable, 
  it 
  seems 
  to 
  me, 
  to 
  know 
  whether 
  in 
  at- 
  

   tempting 
  to 
  maintain 
  sweet 
  races 
  at 
  their 
  highest 
  perfection 
  and 
  in 
  

   breeding 
  for 
  new 
  varieties 
  it 
  is 
  necessary 
  to 
  exclude 
  these 
  inter- 
  

   mediates 
  in 
  selecting 
  seed. 
  East 
  and 
  Hayes, 
  as 
  noted, 
  make 
  the 
  

   general 
  statement 
  that 
  as 
  rather 
  rare 
  mutants 
  they 
  may 
  cause 
  

   considera'Sle 
  trouble 
  to 
  canners 
  but 
  without 
  referring 
  to 
  specific 
  

  

  F 
  

  

  instances. 
  

  

  Jones 
  ('19) 
  reports 
  the 
  continuance 
  of 
  a 
  selection 
  experiment 
  

   with 
  the 
  three 
  intermediate 
  ears 
  obtained 
  by 
  East 
  and 
  Hayes, 
  

   and 
  referred 
  to 
  above. 
  The 
  aim 
  of 
  the 
  experiment 
  was 
  to 
  recover, 
  

   if 
  possible, 
  the 
  parent 
  starchy 
  and 
  sweet 
  types 
  by 
  selecting 
  from 
  

   the 
  selfed 
  offspring 
  of 
  this 
  intermediate. 
  Beginning 
  in 
  1907 
  the 
  

   selection 
  for 
  starchy 
  was 
  carried 
  through 
  ten 
  generations 
  and 
  that 
  

   for 
  sweet 
  through 
  nine 
  generations. 
  Jones 
  obtained 
  in 
  this 
  way 
  a 
  

   sweet 
  race 
  whose 
  kernels 
  still 
  vary 
  somewhat 
  in 
  the 
  amount 
  of 
  

   opaque 
  substance 
  which 
  they 
  contain, 
  though 
  in 
  general 
  they 
  are 
  

   good 
  sugar 
  types 
  and 
  what 
  he 
  calls 
  a 
  pseudo-starchy 
  race, 
  in 
  which 
  

   the 
  kernels 
  are 
  in 
  some 
  ears 
  perfectly 
  plump 
  while 
  in 
  others 
  there 
  

  

  r 
  

  

  