Tropical Grasslands (1982) Volume 16, 80–83

BREEDING CENTROSEMA PUBESCENS IN TROPICAL SOUTH AMERICA

B. GROF

Centro International de Agricultura Tropical, Apartado Aereo 6713, Call, Colombia, South America.

Abstract

Studies were conducted in Colombia, South America, to evaluate F5's of a cross between Centrosema pubescens Q8216 and C. aff. pubescens Q8998. Earlier generations had displayed segregation in readily discernible morphological characters, but transgressive segregates selected from F4 families possessed important agronomic characteristics, including greater forage yield, strong stoloniferous root development, and resistance to cercospora leaf spot, other fungal diseases and mosaic leaf virus. These attributes were retained in the F5 generation. Nine F5 families grown as spaced plants significantly out-yielded indigenous C. pubescens from Ecuador and Colombia. Two F5's also showed superior stolon root development and significantly higher disease resistance than the controls, and these two families were bulked and combined in the F7 generation to form a new experimental line of C. pubescens.

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