RRC ID 47928
Author Ishikawa R, Nishimura A, Htun TM, Nishioka R, Oka Y, Tsujimura Y, Inoue C, Ishii T.
Title Estimation of loci involved in non-shattering of seeds in early rice domestication.
Journal Genetica
Abstract Rice (Oryza sativa L.) is widely cultivated around the world and is known to be domesticated from its wild form, O. rufipogon. A loss of seed shattering is one of the most obvious phenotypic changes selected for during rice domestication. Previously, three seed-shattering loci, qSH1, sh4, and qSH3 were reported to be involved in non-shattering of seeds of Japonica-type cultivated rice, O. sativa cv. Nipponbare. In this study, we focused on non-shattering characteristics of O. sativa Indica cv. IR36 having functional allele at qSH1. We produced backcross recombinant inbred lines having chromosomal segments from IR36 in the genetic background of wild rice, O. rufipogon W630. Histological and quantitative trait loci analyses of abscission layer formation were conducted. In the analysis of quantitative trait loci, a strong peak was observed close to sh4. We, nevertheless, found that some lines showed complete abscission layer formation despite carrying the IR36 allele at sh4, implying that non-shattering of seeds of IR36 could be regulated by the combination of mutations at sh4 and other seed-shattering loci. We also genotyped qSH3, a recently identified seed-shattering locus. Lines that have the IR36 alleles at sh4 and qSH3 showed inhibition of abscission layer formation but the degree of seed shattering was different from that of IR36. On the basis of these results, we estimated that non-shattering of seeds in early rice domestication involved mutations in at least three loci, and these genetic materials produced in this study may help to identify novel seed-shattering loci.
Volume 145(2)
Pages 201-207
Published 2017-4-1
DOI 10.1007/s10709-017-9958-x
PII 10.1007/s10709-017-9958-x
PMID 28238052
MeSH Agriculture / methods Alleles Chromosomes, Plant / genetics Crops, Agricultural / genetics* Crosses, Genetic DNA, Plant / genetics Domestication Genes, Plant / genetics* Genotype Mutation Oryza / classification Oryza / genetics* Phenotype Quantitative Trait Loci / genetics* Seeds / genetics* Species Specificity
IF 1.229
Times Cited 6
Rice W0630