Premium
Asynapsis and Its Inheritance in Sorghum vulgare Pers. 1
Author(s) -
Stephens J. C.,
Schertz K. F.
Publication year - 1965
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1965.0011183x000500040016x
Subject(s) - inheritance (genetic algorithm) , sorghum , crop , geneticist , biology , library science , computer science , agronomy , genetics , gene
R YNAPSIS is one of the meiotic abnormalities which can produce sterility in plants. In a general sense asynapsis, as defined by Randolph (9), means the absence of the usual synaptic association of univalent chromosomes to form bivalent units. Thus, it applies to phenomena described for many species of plants. Two asynaptic lines of sorghum were reported by Krishnaswamy and Meenakshi (7), and they assigned the symbols 1 and a~to the controlling genes. Ross et al. (12) reported a third asynaptic stock, and assigned the symbol as a to the gent producing this effect. In each of these 3 cases asynapsis was inherited as a simple recessive. When these abnormalities were reported, none of the stocks had been checked for alldism of the genes involved. Single-gent inheritance of asynapsis seems to be the rule in other species too. Beadle and McClintock (4) reported its occurrence and simple genie control in maize. The results of more exhaustive studies were later reported by Beadle (2, 3) and Rhoades (10). Asynapsis is similarly controlled by a single gent in Datura, as reported by Bergnet et al. (5). Asynapsis has also been reported in Crepis (Richardson, 11) Pisum (Koller, 6), Allium (Levan, 8), and in other species. The purpose of our study was to characterize a Iine in Sorghum vulgare Pers. which was found to be asynaptic. Included are results of studies of fertility, chromosomal behavior, inheritance, and tests of allelism.