Reference "QTL analysis of rice peduncle vascular bundle system and panicle traits."

Reference ID

7782

Title

QTL analysis of rice peduncle vascular bundle system and panicle traits.

Source

Acta-Botanica-Sinica, 2002, vol. 44, pp. 301-306

Authors (6)

Teng-S	Qian-Q
Zeng-D	Kunihiro-Y
Huang-D	Zhu-L

Abstract

A double haploid (DH) population of rice (Oryza sativa L.) derived from anther
culture of ZYQ8/JX17, a typical indica and japonica hybrid, was used for genetic
analysis of rice peduncle vascular system and panicle traits. The number of
large vascular bundles (LVB), the number of small vascular bundles (SVB) in the
peduncle, and the panicle traits including the number of primary rachis branches
(PRB), the number of spikelets per panicle (SNP), peduncle top diameter (PTD),
and panicle length (PL) were investigated in the parents and DH lines. The
quantitative trait loci (QTLs) for each trait were analyzed based on the
constructed molecular linkage map of this population. Three QTLs for LVB (qLVB-
1, qLVB-6 and qLVB-7) were detected on chromosomes 1, 6, and 7, respectively.
Two putative QTLs for SVB (qSVB-4 and qSVB-6) were mapped on chromosomes 4 and 6
respectively. Four QTLs (qPRB-4a, qPRB-4b, qPRB-6 and qPRB-7) on chromosomes 4,
6, and 7, respectively, were detected for PRB. Three QTLs (qSPN-4a, qSPN-4b and
qSPN-6) were identified on chromosomes 4 and 6, respectively, which could
significantly affect SPN. Five QTLs for PTD (qPTD-2, qPTD-5, qPTD-6, qPTD-8 and
qPTD-12) were identified on chromosomes 2, 5, 6, 8, and 12, respectively. Three
QTLs for PL (qPL-4, qPL-6 and qPL-8) were detected on chromosomes 4, 6, and 8,
respectively. Clustering of QTLs, such as qLVB-6, qSVB-6, qSNP-6, qPTD-6, and
qPL-6 detected in the interval G122-G1314b on chromosome 6, was found. These
results suggest that some QTLs for peduncle vascular bundle system are possibly
responsible for the panicle traits.