Work

A new method for evaluation of the resistance to rice kernel cracking based on moisture absorption in brown rice under controlled conditions

Year: 2015

Type: article

Abstract: We developed and evaluated the effectiveness of a new method to detect differences among rice cultivars in their resistance to kernel cracking. The method induces kernel cracking under laboratory controlled condition by moisture absorption to brown rice. The optimal moisture absorption conditions were determined using two japonica cultivars, 'Nipponbare' as a cracking-resistant cultivar and 'Yamahikari' as a cracking-susceptible cultivar: 12% initial moisture content of the brown rice, a temperature of 25°C, a duration of 5 h, and only a single absorption treatment. We then evaluated the effectiveness of these conditions using 12 japonica cultivars. The proportion of cracked kernels was significantly correlated with the mean 10-day maximum temperature after heading. In addition, the correlation between the proportions of cracked kernels in the 2 years of the study was higher than that for values obtained using the traditional late harvest method. The new moisture absorption method could stably evaluate the resistance to kernel cracking, and will help breeders to develop future cultivars with less cracking of the kernels.

Source: Ikushugaku zasshi

DOI: 10.1270/jsbbs.65.381

Authors: Takeshi Hayashi, Asako Kobayashi, Katsura Tomita, Toyohiro Shimizu

Institution: Fukui Agricultural Experiment Station

Language: English

Topic: Rice Cultivation and Yield Improvement

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: diamond

Funders: Ministry of Agriculture, Forestry and Fisheries, National Agriculture and Food Research Organization