Recent Advances in Physiological and Genetic Studies on Chilling Tolerance in Soybean

Japan Agricultural Research Quarterly
ISSN 00213551
NII recode ID (NCID) AA0068709X
Full text
43-02-03.pdf637.25 KB

Low temperatures cause a decrease in seed yield and deterioration of seed quality in soybeans and have threatened stable soybean production in cool areas. To overcome this problem, physiological and genetic analyses have been conducted as steps towards the development of efficient breeding systems. Several evaluation methods that are useful for physiological studies as well as for genetic screening have been developed. Low temperature treatment for four weeks or longer starting at the first flowering stage in plants was found to reduce all of the yield components and result in genotypic variation in chilling tolerance for seed yield during reproductive growth. Analysis of low seed fertility induced by low temperature treatment prior to flowering revealed that the tetrad stage during pollen development is the most sensitive to chilling. Browning of seed coats, a major factor causing deterioration of seed quality, was induced most severely by low temperature treatment about one week after flowering. In addition, several genetic loci associated with chilling tolerance have been identified. Cultivars and lines with the T allele at the T locus, which controls the color of pubescence, have repeatedly been demonstrated to exhibit better chilling tolerance than those with the other allele, t. Maturity loci controlling flowering time and maturity such as E1, e3 and e4 were also found to be associated with chilling tolerance for both seed yield and quality. However, evidence showing that these loci are directly involved in chilling tolerance remains to be provided.

Date of issued
Creator FUNATSUKI Hideyuki OHNISHI Shizen
Subject

browning in seed coats

evaluation methods

genetic loci

Publisher Japan International Research Center for Agricultural Sciences
Available Online
NII resource type vocabulary Journal Article
Volume 43
Issue 2
spage 95
epage 101
DOI 10.6090/jarq.43.95
Rights Japan International Research Center for Agricultural Sciences
Language eng

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