Natural outcrossing in groundnut and its implications in groundnut breeding uri icon

abstract

  • Estimates of outcrossing in four groundnut (Arachis hypogaea L.) varieties belonging to different botanical types were made from a rectangular crossing design where the normal plants were surrounded in all directions by a 'Krinkle' dominant leaf marker. In a three year study conducted during the 1983-84 postrainy season and 1984 and 1985 rainy seasons at ICRISAT Centre, the percentage of outcrossing on individual plants ranged from 0.0 to 5.35 across seasons and genotypes. A marked increase in outcrossing was noticed during the postrainy season compared to the rainy season. The Spanish and Valencia types showed slightly greater outcrossing than the Virginia types. The levels of outcrossing at various locations in groundnut are reviewed and possible ways of utilising outcrossing in groundnut improvement are discussed

publication date

  • 1993