﻿AND 
  STARCH 
  CHARACTERS 
  IN 
  CORN 
  183 
  

  

  observations 
  go, 
  of 
  the 
  general 
  behavior 
  of 
  the 
  sugar 
  and 
  starch 
  

   characters 
  when 
  crossed. 
  The 
  data 
  as 
  to 
  small 
  fluctuating 
  but 
  

   heritable 
  variations 
  as 
  given 
  by 
  Jennings 
  ('i6), 
  Stout 
  ('15), 
  

   Hegner 
  ('19) 
  and 
  others, 
  for 
  asexual 
  reproduction 
  In 
  pedigreed 
  

   cultures 
  has 
  shown 
  that 
  the 
  long 
  recognized 
  fixity 
  of 
  type 
  resulting 
  

   from 
  asexual 
  reproduction 
  while 
  sufficient 
  in 
  many 
  cases 
  to 
  enable 
  

   the 
  horticulturist 
  and 
  practical 
  breeder 
  to 
  furnish 
  a 
  fairly 
  stable 
  

   product 
  for 
  the 
  market, 
  is 
  by 
  no 
  means 
  absolute. 
  Much 
  more 
  is 
  

   it 
  true 
  as 
  shown 
  by 
  Castle 
  and 
  Phillips 
  ('14) 
  for 
  rats, 
  Stout 
  and 
  

   Boas 
  for 
  flower 
  number 
  In 
  chicory 
  ('18), 
  as 
  well 
  as 
  in 
  much 
  of 
  the 
  

   older 
  literature 
  of 
  the 
  subject, 
  that 
  in 
  sexual 
  reproduction, 
  we 
  are 
  

   concerned 
  not 
  with 
  fixed 
  unit 
  factors 
  subject 
  only 
  to 
  relatively 
  

   rare 
  mutations, 
  but 
  with 
  fluctuating 
  variability 
  probably 
  increased 
  

   by 
  the 
  special 
  vicissitudes 
  of 
  cell 
  and 
  nuclear 
  fusion 
  and 
  chromo- 
  

   some 
  pairing 
  and 
  reduction. 
  Certainly 
  the 
  current 
  interpretation, 
  

   except 
  for 
  Jones*s 
  paper, 
  of 
  the 
  behavior 
  of 
  the 
  sugar 
  and 
  starch 
  

   characters 
  in 
  corn 
  as 
  due 
  to 
  a 
  pair 
  of 
  fixed 
  Mendclizing 
  factors, 
  

   subject 
  to 
  only 
  rare 
  and 
  relatively 
  unimportant 
  mutations, 
  has 
  not 
  

   been 
  in 
  accordance 
  with 
  the 
  facts, 
  even 
  as 
  they 
  were 
  shown 
  by 
  

  

  Correns's 
  great 
  paper. 
  

  

  Department 
  of 
  Bota? 
  

  

  Columbia 
  University 
  

  

  Literature 
  cited 
  

  

  I 
  

  

  Komicke, 
  F. 
  Handbuch 
  des 
  Getreidebaues. 
  Bonn. 
  1885. 
  

   Rabl, 
  C. 
  Uber 
  Zellteilung. 
  Angt. 
  Anz. 
  4: 
  21-30. 
  /. 
  /, 
  2. 
  1S89. 
  

   Harper, 
  R. 
  A. 
  Kernthellung 
  und 
  frei'e 
  Zellbildung 
  im 
  Ascus. 
  Jarhb. 
  

  

  ■\VIss. 
  Bot. 
  34: 
  95-130. 
  pi. 
  J 
  I, 
  12. 
  1897. 
  

   Sturtevant, 
  E. 
  L. 
  Varieties 
  of 
  corn. 
  U. 
  S. 
  Dept. 
  Agr. 
  Exp. 
  Sta. 
  Bull. 
  

  

  57: 
  1-108. 
  1899. 
  

   Correns, 
  C. 
  Bastarde 
  zwischen 
  Maisrassen, 
  mit 
  besonderer 
  Beruck- 
  

  

  sichtigung 
  der 
  Xenien. 
  Bibl. 
  Bot. 
  53: 
  1-161. 
  pi. 
  i, 
  2. 
  1901. 
  

   ConkUn, 
  E. 
  G. 
  Karyokinesis 
  and 
  cytokinesis 
  in 
  the 
  maturation, 
  

  

  fertilization, 
  and 
  cleavage 
  of 
  Crepidula 
  and 
  other 
  Gasteropoda. 
  

  

  Jc 
  

   Allen 
  

  

  121. 
  1902. 
  

  

  le 
  pollen 
  m 
  

   89-258. 
  pi. 
  6-9. 
  1905 
  

  

  Allen, 
  C. 
  E. 
  Das 
  Verhalten 
  der 
  Kernsubstanzen 
  wahrend 
  dcr 
  Synapsis 
  

   in 
  den 
  Pollen 
  mutterzellen 
  von 
  Lilium 
  canadensc. 
  Jahrl). 
  W 
  iss. 
  

   Bot. 
  42: 
  pi. 
  2. 
  1905. 
  

  

  