Reference "QTL mapping for developmental behaviour of panicle dry weight in rice"

Reference ID

7926

Title

QTL mapping for developmental behaviour of panicle dry weight in rice

Source

Scientia Agricultura Sinica, 2000, vol. 33, pp. 24-32

Authors (5)

Zhu-J	Wu-P
Benmoussa-M	Yan-J
He-C

Abstract

A population of 123 doubled haploid (DH) lines, derived from a cross between
indica variety IR64 and japonica variety, Azucena was evaluated for panicle dry
weight at different stages, measured at 10-day intervals. Based on a rice
genetic linkage map of 175 molecular markers, including RFLPs, enzyme markers
and RAPDs, QTLs for the developmental behaviour of panicle dry weight were
determined dynamically using the composite interval mapping method in
combination with the conditional analysis method. The number of unconditional
QTLs for panicle dry weight detected was 14. However, only 3 QTLs were detected
at the final stage. Conditional QTL analysis of rice panicle dry matter
accumulation could provide an insight into both spatial and temporal patterns of
gene expression. By comparing the sum of QTL additive effects for parents with
that for extreme ideal individuals, we found that the alleles of positive or
negative gene effects were dispersed in various individuals. The result also
indicated that two sets of genes might be involved in the process of panicle dry
matter accumulation, with the development of the husk of rice kernels, lemma and
palea being determined by one set of genes, and rice kernel content being
controlled by the other set of genes.