ISSN:
1439-0523
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Norin-PL8 (‘PL8’) is an extremely cool-tolerant line of rice in Japan that contains genes for cool tolerance originating from a javanica landrace. It was investigated to see whether the dwarfing gene d18-k (kotaketamanishiki dwarf) exerts its pleiotropic effect on enhancing the cool tolerance at the booting stage in the genetic background of PL8. The d18-k isogenic line of the recurrent parent PL8 (D8), PL8, and two commercial cultivars ‘Hayayuki’ and ‘Kirara 397’ were used. For each line/cultivar, the 12°C-5-day treatment was conducted at various times during the booting stage. In addition to spikelet fertility, the ratio (%) of the fertilized-spikelet number of each treated panicle to the varietal mean of fertilized-spikelet number per panicle in the control (FS-T/C) was adopted to estimate cool temperature damage. For FS-T/C, the lines-cultivars ranked in the order of D8 〉 PL8 〉 ‘Hayayuki’ 〉 ‘Kirara 397’, reflecting their cool tolerances. D8 exceeded PL8 in both pollen grain number per anther in the control and as an indicator of pollen fertility after the treatment, as a result of the effects of d18-k. Consequently, d18-k can be used to develop super-highly cool-tolerant cultivars for cool-weather areas.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1046/j.1439-0523.2003.00843.x
