Hayes and Garber - Cucurbit Breeding

xiv
CONTENTS
PAGE
Marquis wheat 136
Winter wheat breeding at the Minnesota Experiment Station . . . .137
Breeding beans resistant to Colletotrichum lindemuthianum 139
An improved strain of tobacco 139
Summary 142
CHAPTER XI
COWPEAS, SOYBEANS AND VELVET BEANS
Cowpeas (Vigna sinensis) 143
Origin 143
Description and inheritance 143
Some results of selection and crossing 145
Soybeans (Soja max) 146
Origin .146
Classification and inheritance 146
Breeding 148
Velvet bean (Stizolobium) 149
Origin 149
Important characters and inheritance 149
Mutations 150
Breeding 151
CHAPTER XII
FLAX AND TOBACCO
Flax 153
Species crosses 153
'Inter-relation of factors for flower and seed colors . . . \ . . . 153
Inheritance of size characters 156
Wilt resistance in flax 157
Methods of breeding 158
Tobacco 159
The genus Nicotiana 159
Parthenogenesis 160
. .
Sterility 160
Color characters 161
Quantitative characters 162
Environment as a factor in tobacco breeding 165
Mutations in tobacco 167
CHAPTER XIII
COTTON AND SORGHUM
Cotton 173
Classification and inheritance 173
Mutations in cotton 177
Cotton breeding 177