Identification and Characterization of Quantitative Trait Loci for Shattering in Rice Landrace Jiucaiqing from Taihu Lake Valley, China.
Plant Genome
; 9(3)2016 11.
Article
em En
| MEDLINE
| ID: mdl-27902802
ABSTRACT
Easy shattering reduces yield from grain loss during rice ( L.) harvest. We characterized a nonshattering rice landrace Jiucaiqing from Taihu Lake valley in China. The breaking tensile strength (BTS; grams force, gf) of the grain pedicel was measured using a digital force gauge to evaluate the degree of shattering at 0, 7, 14, 21, 28, and 35 d after heading (DAH). The BTS of Jiucaiqing did not significantly decrease with increasing DAH, maintaining a level of 152.2 to 195.9 gf, while that of IR26 decreased greatly during 0 to 14 DAH and finally stabilized at â¼100 gf. Then the chromosome segment substitution lines (CSSLs) and near isogenic lines (NILs) of Jiucaiqing in IR26 background were developed for quantitative trait loci (QTL) mapping. Four putative QTL (, , , and ) for shattering were detected, and the was confirmed on chromosome 1. We further mapped to a 98.4-kb region, which contains 14 genes. Os01g62920 was considered to be a strong candidate for , which colocated with . Further quantitative real-time polymerase chain reaction (PCR) analyses confirmed that the QTL can significantly decrease the expression of shattering related genes (, , , , and ) especially at the middle development stage at 10 and 15 cm panicle length, which causes rice shattering decrease. The elite allele and the NIL with desirable agronomic traits identified in this study could be useful for rice breeding.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Oryza
/
Locos de Características Quantitativas
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
País como assunto:
Asia
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article