A

 

Document Type

Article

Journal/Book Title/Conference

Proceedings of the American Society for Horticultural Science

Volume

64

Publication Date

3-18-1954

First Page

410

Last Page

416

Abstract

A number of investigations have indicated that the amount of natural hybridization in lima beans varies widely in different sections of the United States. Along the eastern seaboard and in the southeastern United States it has been reported to vary from as little as 6 per cent to as much as 100 per cent ( 4, 7, 8, 9). In California its incidence is of the order of 1 per cent according to one report (6) and very rare according to another ( 5). Some observations made at Davis in 1946 and 1947 suggested that these values may be underestimates of the amount of natural crossing in this species in California. Hence, measurements of its extent were taken when the opportunity arose incidental to other activities during the period 1948 through 1952. In addition, some experiments were conducted expressly to measure the effect of certain factors on the rate of hybridization. The results of these observations and experiments are reported here.

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