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Published in Crop Sci 14:412-416 (1974)
© 1974 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Vegetative and Reproductive Development of Virginia-Type Peanut Varieties in Different Stand Densities1

A. Cahaner and A. Ashri2

The yield and reproductive and vegetative development of four Virginia-type varieties of peanuts (Arachis hypogaea L.) differing in growth habit and plant size were tested under standard, medium, and high densities. The following parameters were studied in biweekly intervals during the season: plant size and dry weight; length of main branches and degree of branching; number and dry weight of pegs and pods at four maturity stages; and final yield and quality of mature pods.

Despite the size and growth habit differences between the varieties, there were no significant density x variety interactions.

Increased stand density led to increased vegetative growth and more numerous reproductive organs at all maturity stages per unit area, but the yields of mature pods were equal in the three densities. Yield did not increase with density because crowding did not lead to earlier termination of pod setting. The presence of many maturing pods apparently arrested the maturation of a high proportion. Breeding and physiological research should be devoted to the production of varieties which terminate their pod setting early.

Key Words: Arachis hypogaea • Branching degree • Dry matter accumulation • Plant weight • Pod set • Pod maturity stages • Yield

1 We acknowledge with thanks the technical help of Mr. M. Mor and L. Pines and the advice of Prof. A. Marani. This research was partially supported by a research grant of the Israel Groundnut Production and Marketing Board and the Israel Ministry of Agriculture.

2 Graduate Student and Associate Professor of Genetics and Plant Breeding, The Hebrew University, Faculty of Agriculture, Rehovot, Israel.

Received for publication October 4, 1973.




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