Inheritance of flowering time in six pea cultivars (Pisum sativum L.)

Genetical studies of quantitative characters in peas. 1. A seven-parent diallel cross of cultivars

“…Days to first flower is a character which has been analysed by RoWLANDS (1964) and by WATTS et al . (1970) and their results are remarkably similar to those reported here.…”

Environmental Interaction and The Genetics of Flowering

“…seems to vanish altogether if the seeds are exposed to continuous light from the start of germination or the plants are given vernalization followed by-continued cold (2°_3°C) nights (1 29). Field conditions in cool temperate regions tend to minimize the effect of this gene (and its modifiers), and it is not surprising that a number of genetic studies under these conditions have led to the conclusion that flowering in Pisum is largely determined by a simple additive polygenic system (18, 170,178,190). It is of interest It is now quite clear that the "polygenic" basis of this fl owering difference was in fact the major locus 1f (120,124,126) for which segregation is of classic clarity given certain environmental circumstances and/or gene backgrounds.…”

Flowering in Pisum: multiple alleles at the lf locus

“…UNDER field conditions flowering often shows continuous variation and many workers using these conditions have analysed their data by the methods of quantitative genetics (Clay, 1935;Rowlands, 1964;Watts et al, 1970;Snoad and Arthur, 1 973a, b). These workers generally conclude that flowering node and flowering time are under the control of simple, additive, polygenic systems with dominance of little importance but Rowlands also found evidence of a major gene or "effective factor" (possibly Sn) which delayed flowering and whose effect was increased in short days.…”