Hayes and Garber - Cucurbit Breeding

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CONTENTS
PAGE
Effects of a cross in normally self-fertilized species 41
Effects of self-fertilization in normally cross-fertilized plants .... 45
Explanation of hybrid vigor 47
CHAPTER IV
FIELD PLOT TECHNIC
Soil heterogeneity 51
Harris' method of estimating soil heterogeneity 51
Estimating soil heterogeneity by means of checks 53
Use of checks in correcting yields 53
Use of probable error in eliminating strains 57
The pairing method of securing a probable error 57
Replication and its value 58
Size of plot 60
Shape of plot and border effect 61
Competition as a factor in plot variability 62
Climatic variations . . 64
Summary of field plot technic 65
CHAPTER V
CONTROLLING POLLINATION
Selfing plants artificially . 67
Technic of crossing .......... 68
Crossing of smal' grains 69
Crossing large-flowered legumes 71
Depollination with water 73
Summary of technic of crossing 74
CHAPTER VI
CLASSIFICATION AND INHERITANCE IN
WHEAT
Genetic classification 75
Wheat species groups 77
Poloni um crossed with other species 79
Some linkage results in wheat crosses 79
Spike density 81
Seed characters 81
Chaff characters . , 84
Presence or absence of beards 85
Inheritance of disease resistance . 85
Inheritance of other characters 87
CHAPTER VII
CLASSIFICATION AND INHERITANCE OF SMALL GRAINS OTHER THAN WHEAT
Classification and inheritance in oats 89
Crosses betwen Avena fatua and A. sativa 90
Origin of cultivated varieties of A. sterilis 90
Differences in awn development 90