﻿172 
  Harper: 
  Inheritance 
  of 
  sugar 
  

  

  was 
  excluded. 
  To 
  obtain 
  a 
  starchy 
  race 
  from 
  a 
  sweet 
  race 
  is 
  

   much 
  easier, 
  I 
  have 
  practically 
  pure 
  flint 
  ears, 
  as 
  far 
  as 
  appear- 
  

   ances 
  go, 
  from 
  the 
  above 
  described 
  cross 
  of 
  Ruby 
  Sweet 
  and 
  Black 
  

   Mexican. 
  

  

  It 
  is 
  worthy 
  of 
  note 
  here 
  that 
  from 
  this 
  dent 
  sweet 
  corn 
  cross 
  

   quite 
  a 
  percentage 
  of 
  flint 
  kernels 
  appear. 
  East 
  has 
  also 
  noted 
  this 
  

   fact 
  in 
  a 
  similar 
  case 
  and 
  regards 
  it 
  as 
  showing 
  that 
  Black 
  Mexican 
  

   Sweet 
  had 
  a 
  flint 
  corn 
  in 
  its 
  ancestry 
  and 
  carries 
  latent 
  flint. 
  He 
  

   believes 
  that 
  the 
  sweet 
  corns 
  are 
  of 
  trwo 
  groups 
  in 
  this 
  respect, 
  

   derived 
  respectively 
  from 
  dent 
  and 
  flint 
  ancestries 
  and 
  that 
  their 
  

   behavior 
  in 
  crosses 
  with 
  dents 
  and 
  flints 
  will 
  indicate 
  to 
  which 
  of 
  

   the 
  classes 
  they 
  belong. 
  In 
  view 
  of 
  the 
  fluctuating 
  character 
  of 
  both 
  

   sweet 
  and 
  starchy 
  characters 
  in 
  crosses 
  such 
  a 
  contention 
  is 
  difficult 
  

   to 
  test. 
  As 
  bearing 
  on 
  the 
  whole 
  question 
  as 
  to 
  the 
  significance 
  in 
  

   practical 
  breeding 
  work 
  of 
  the 
  occurrence 
  of 
  fluctuating 
  variants 
  

   between 
  the 
  parental 
  types 
  in 
  crossing 
  it 
  is 
  worth 
  while 
  to 
  quote 
  

   here 
  the 
  final 
  paragraph 
  of 
  a 
  recent 
  paper 
  by 
  Kempton 
  ('19), 
  based 
  

   on 
  his 
  own 
  and 
  Collins's 
  work 
  on 
  the 
  inheritance 
  of 
  endosperm 
  

   characters 
  in 
  corn. 
  

  

  For 
  the 
  breeder 
  of 
  crop 
  plants 
  where 
  most 
  of 
  the 
  desired 
  characters 
  are 
  almost 
  

   infinitely 
  complex, 
  seldom 
  alternative, 
  and 
  often 
  intangible, 
  Mendelism 
  seems 
  to 
  

   have 
  little 
  of 
  practical 
  value 
  to 
  offer, 
  whether 
  the 
  attempt 
  of 
  some 
  investigators 
  to 
  

   so 
  extend 
  the 
  theory- 
  as 
  to 
  embrace 
  such 
  characters 
  be 
  approved 
  or 
  not. 
  While 
  Men- 
  

   delism 
  may 
  assist 
  in 
  making 
  desired 
  combinations, 
  there 
  is 
  nothing 
  to 
  show 
  that 
  it 
  

   can 
  serve 
  as 
  a 
  substitute 
  for 
  selection 
  either 
  in 
  finding 
  the 
  best 
  stocks 
  or 
  in 
  preserving 
  

   them 
  from 
  subsequent 
  deterioration. 
  

  

  w 
  

  

  Collins 
  and 
  Kempton 
  have 
  perhaps 
  done 
  more 
  than 
  any 
  others 
  

  

  to 
  broaden 
  our 
  knowledge 
  of 
  the 
  behavior 
  of 
  corn 
  in 
  crossing, 
  and 
  

  

  the 
  above 
  statement 
  is 
  particularly 
  interesting 
  in 
  view 
  of 
  the 
  

  

  sweeping 
  generalizations 
  found 
  in 
  such 
  a 
  book 
  as 
  that 
  of 
  Babcock 
  

   and 
  Claussen. 
  

  

  r 
  

  

  2. 
  Pairing 
  of 
  parental 
  chromosomes, 
  reduction 
  divisions, 
  

  

  AND 
  segregation 
  

  

  The 
  occurrence 
  of 
  intermediates 
  need 
  not 
  as 
  noted 
  lead 
  us 
  to 
  

  

  -k 
  

  

  question 
  the 
  cytological 
  evidence 
  for 
  the 
  segregation 
  of 
  the 
  

   chromosomes 
  from 
  the 
  male 
  and 
  female 
  parents 
  respectively 
  In 
  

   the 
  reduction 
  division 
  and 
  the 
  chance 
  recombination 
  of 
  these 
  

   chromosomes 
  in 
  the 
  succeeding 
  fertilizations. 
  The 
  cytological 
  

  

  