Inheritance of fresh seed dormancy in Spanish-type peanut (Arachis hypogaea L.): bias introduced by inadvertent selfed flowers as revealed by microsatellite markers control

• Published in: African journal of biotechnology 2010-03, Vol.9 (13), p.1905-1910
• Main Authors: Faye, Issa, Fonceacute ka, Daniegrave l, Rami, Jean Franccedil ois, Tossim, Hodo Abolo, Sall, Mbaye Ndoye, Diop, A Tahir, Ndoye, Ousmane
• Format: Article
• Language: English
• Subjects: Arachis hypogaea
• ISSN: 1684-5315; 1684-5315
• DOI: 10.5897/AJB09.1321

Production and seed quality in peanut (Arachis hypogaea L.) can be reduced substantially by in situ germination under unpredictable rainfed environments. Inheritance of fresh seed dormancy in Spanish x Spanish crosses was studied with two sets of segregating populations, an F sub(2) population derived from true F sub(1) hybrids identified with peanut microsatellites markers and other populations (F sub(2), BC sub(1)P sub(1S) and BC sub(1)P sub(2S)) from randomly-selected F sub(1) individuals. In the F sub(2) population developed with true F sub(1) hybrids, the chi square test was not significant for the deviation from the expected 3:1 (dormant: non-dormant) ratio. In addition, the bimodal frequency distribution curve with the F sub(2) population gave more evidence that fresh seed dormancy is controlled by a single dominant gene. The average frequency (48%) of true F sub(1) hybrids give evidence that deviations from expected ratios in the populations (F sub(2) and BC sub(1)P sub(1S)) developed from non-tested F sub(1) individuals, is most likely due to inadvertent selfs. This study emphasized the need to identify with molecular markers the cross progenies in self-pollinated crops as peanut before testing for any trait.