Methods of Evaluating Clones of Timothy, Phleum Pratense, and Their Breeding Behavior

86 Pages·10.152 MB·English

by  Wilder, William Baylor

PURDUE UNIVERSITY
THIS IS TO CERTIFY THAT THE THESIS PREPARED UNDER MY SUPERVISION
by William Baylor Wilder_____________________________
ENTITLED METHODS OF EVALUATING- CLOKES OF TIMOTHY. PHLEUM
PRATmSE f AMD THEIR BREM)II.G BEHAVIOR____________
COMPLIES WITH THE UNIVERSITY REGULATIONS ON GRADUATION THESES
AND IS APPROVED BY ME AS FULFILLING THIS PART OF THE REQUIREMENTS
FOR THE DEGREE OF
Doctor of Philosophy
H. H, ggamer P ro fesso r in C harge o f T hesis
/ J# B. Peterson
H ear of S chool, or Department
V
March lii « 1951
TO THE LIBRARIAN:—
1$
THIS THESIS IS NOT TO BE REGARDED AS CONFIDENTIAL
PHoPBeeo» xv ohavgb
GBAXt. SCBOOli FORM 9

METHODS OF EVALUATING CLONES OF TIMOTHY,
PHLEüM PRATENSE, AND THEIR BREEDING BEHAVIOR
A thesis
Submitted to the Faculty
of
Purdue University
by
William Baylor Wilder
Da Partial Fulfillment of the
Requirements for the Degree
of
Doctor of Philosophy
June, 1951
ProQuest Number: 27714282
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ACKNOWLEDGSÆEM'S
The author is deeply grateful to Dr. H* H. Kramer of the
Purdue TJhiversity department of Agronomy for suggesting this
research, for guidance in conducting it, for assistance in the
analysis and interpretation of the results, and for critical
reading of the manuscript, and to Purdue university department
of Agronomy for physical and financial assistance to make the
research possible*
Appreciation is extended to Drs* J. R* Shay and G* A* dries
of the Purdue University department of Agricultural Botany and
Plant Pathology for critical reading of the manuscript, and to
my wife,, Hazel, for typing it.
ii
table of contents
Page
ABSTRACT OF WORK PREVIOUSLY REPORTED..... viii
ABSTRACT OF PRESENT WORK....................................... X
INTRODUCTION ...................... 1
LITERATURE REVIEW.............................................. 4
METHODS AND PROCEDURES......................................... 10
EXPERIMENTAL RESULTS........................................... 18
Bloom Dates....... ................ .......... ... •....... ... 18
Plant Height....... 2$
Panicle Length........... 33
Leaf Length....... 37
Leaf Width..................... 41
Leaf Firing............. 45
Yield.............. 51
SUMMARY.......... 66
BIBLIOGRAPHY............................ 69
VITA................. ...... .......... 72
iii
LIST OF TABLES
Table Page
1. Mean Days After May 31 on which Timothy Clones First Bloomed 18
2. Mean Days After May 31 When First Bloom Was Recorded on Spaced
Plants and Full Bloom on Seeded Rows of Timothy. Group I* 19
3* Mean Days After May 31 When First Bloom Was Recorded on Spaced
Plants and Full Bloom on Seeded Rows of Timothy. Group II 20
4# Mean Days After May 31 When First Bloom Was R corded on Spaced
Plants and Full Bloom on Seeded Rows of Timothy. Group III.... 21
5» Correlations of Date of Bloom Among Timothy Clones and Their
Progenies............. 23
6. Her liability of Date of Bloom in Timothy ..... 23
7* Mean Heights in Centimeters of Timothy Clones and Their Prog­
enies. Group I 25
8* Mean Heights in Centimeters of Timothy Clones and Their Prog­
enies. Group II 26
9» Mean Heights in Centimeters of Timothy Clones and Their Prog­
enies. Group III. 27
10. Correlations of Plant Height Among Timothy Clones and Their
Progenies......... 29
11. Her it ability of Plant Height in Timothy ..... 30
12. Mean Panicle Lengths in Centimeters of Timothy Clones and Their
Progenies. Group I. ...... ...... 33
13* Mean Panicle Lengths in Centimeters of Timothy Clones and Their
Progenies. Group II............. 34
14* Mean Panicle Lengths in Centimeters of Timothy Clones and Their
Progenies• Group III...... 35
13• Correlations of Panicle Lengths Among Timothy Clones and Their
Progenies. ...... 36
16. Her it ability of Panicle Lengths in Timothy......... 36
17* Mean leaf Lengths in Centimeters of Timothy Clones and Their
Progenies. GToup I* ...... 37
18. Mean Leaf Lengths in Centimeters of Timothy Clones and Their
Progenies. Group II....... 38
19. Mean Leaf Lengths in Centimeters of Timothy Clones and Their
Progenies. Group III....................................... 39
20. Correlations of Leaf Length Among Timothy Clones and Their
Progenies........... »...... 39
21» Her it ability of Leaf Length in Timothy....................... 40
22» Mean Leaf Widths in Centimeters of Timothy Clones and Their
Progenies. Group 1......................................... 41
23. Mean Leaf Widths in Centimeters of Timothy Clones and Their
Progenies. Group II............... ... ............. ...... 42
24. Mean Leaf Widths in Centimeters of Timothy Clones and Their
Progenies. Group III * * 43
23* Correlations of Leaf Widths Among Timothy Clones and Their
Progenies -........................................... 44
26. Heritability of Leaf Widths in Timothy..................... .. 44
27. Mean Rate of Leaf Firing of Timothy Clones and Their Progenies.
Group I. ............................................... 45
28. Mean Rate of Leaf Firing of Timothy Clones and Their Progenies.
Group II................................. 46
29. Mean Rate of Leaf Firing of Timothy Clones and Their Progenies.
Group III. ........... 47
30# Correlations of Firing Ratings Among Timothy Clones and Their
Progenies. ............. 49
31* Heritability of Leaf Firing in Timothy................... 5°
32. Mean Yield Per Plant of Timothy Clones in 1947* 1949* and 1930. * 31
33* & Comparison of the Yields of Nurseries I, II, and III in 1949* * 32
34* Mean Yield of Forage of Spaced Plants and Seeded Row Plots of
Timothy in 1930* Group 1...................................36
33* Mean Yield of Forage of Spaced Plants and Seeded Row Plots of
Timothy in 1930. Gà*oup II............................. 37
36. Mean Yield of Forage of Spaced Plants and Seeded Row Plots of
Timothy in 1930. Group III.................................58
37* Correlations of Yield Among Clones and Their Progenies......... 6l
v
Table Page
38. Heritability of Yield in Timothy.................-..... 6l
39* Correlations Between Height and Yield of Spaced Clones and
Between Height of Spaced Clones and Yield of Their Seeded
Progenies....... 62
40. Yield and Vigor Ratings of Clones in 195°......*...............64
vi
LIST OF FIGURES
Figure Page
1. Detail of bagging. ......... 16
2. Plant height. Clone 8 at left and clone 5 at right............. 31
3- A genetic contrast............................................32
4* & 5* A contrast in amount of firing...... 48
6* An effect of disease............. 54
7* & 8* A contrast in yielding ability............ 55
9* Plant types............... ....... 65
vii