RECEIVED 
• OCT 6 1927* 
UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1483 
.iWfMV 
gricdtnre I 
Washington, D. C. 
July, 1927 
BUD SELECTION IN THE VALENCIA ORANGE: 
VARIATIONS 
PROGENY TESTS OF LIMB 
By A. D. Shamel, Physiologist in Charge, C. S. Pomeroy, Associate Pomologist, 
and R. E. Caryl, Assistant Pomologist, Office of Horticulture, Bureau of 
Plant Industry 
CONTENTS 
Page 
Introduction 1 
Bud variation in the Valencia orange_ 2 
Importance of bud selection in the 
Valencia orange 3 
Occurrence of undesirable Valencia 
variations 4 
Progeny tests of limb variations 4 
Progeny performance records 5 
Unproductive strain 5 
Willow-Leaf strain 8 
Dwarf strain 10 
Persistent-Style strain 12 
Flattened strain 15 
Long strain 17 
Fluted strain 19 
Page 
Progeny performance records — Contd. 
Corrugated strain 20 
Ridged strain 22 
Coarse strain 23 
Yellow strains 25 
Misshapen-Leaf strain 27 
Strains of minor economic im- 
portance 28 
Other striking Valencia bud va- 
riations 29 
Lessons from the progeny tests 32 
Isolation and propagation of superior 
strains - 34 
Summary 35 
Literature cited 37 
INTRODUCTION 
The two commercially important varieties of oranges grown in 
the Southwest are the Washington Navel, the fruits of which ma- 
ture and are marketed mostly during the fall and winter months, 
and the Valencia, which produces its crop for marketing largely 
during the spring and summer months. The Washington Navel 
was the first variety to be grown extensively in the Southwest, hav- 
ing been introduced at Riverside, Calif., in 1873, and its reputation 
in the market was the foundation upon which the successful citrus 
industry of that section was developed. 
The introductions of the Valencia orange into California were a 
little later than that of the Washington Navel, the first of which 
definite records are available being that of A. B. Chapman and 
George H. Smith, of Los Angeles County, who received trees from 
Thomas Rivers, Sawbridgeworth, Kent, England, in 1876. Several 
trees in this planting were subsequently identified as being of the 
Valencia variety. Later introductions of the Valencia were made 
30307°— 27 1 
