Reference "Genetic analysis of the panicle traits related to yield sink size of rice"

Reference ID

6620

Title

Genetic analysis of the panicle traits related to yield sink size of rice

Source

Acta genetica Sinica, 2002, vol. 29, pp. 144-152

Authors (5)

Cui-K-H	Peng-S-B
Xing-Y-Z	Yu-S-B
Xu-C-G

Abstract

In the study, ten panicle traits associated with yield sink size were measured
in a recombinant inbred population derived from Zhenshan 97 x Minghui 63.
Generally, spikelets per panicle were more closely correlated with number of
secondary branch per panicle, spikelets on secondary branch per secondary
branch, and spikelet density. A total of 53 QTL were detected for ten traits in
two years. Approximately 43.4% QTLs were detected in both two years, suggesting
environmental effects on traits. Five chromosomal regions (G359-RG532 and C567-C86-
RG236 on chromosome 1, R712-RM29 on chromosome 2, P-RG424 on chromosome 6, C148-
RM258 on chromosome 10) were detected to have effects on multiple panicle
traits. QTLs for traits, which were correlated, were generally localized in
similar chromosomal regions, suggesting that pleiotropy and (or) linkage are the
molecular basis of relationship between them. A large number of digenic
interactions were detected, 18.2% of which were detected simultaneously in both
two years. The proportion of common interactions was trait-depended, ranging
8.7% for spikelets on secondary branch per secondary branch to 32.6% for panicle
length. Approximately 26.7% of common two-locus combinations had pleiotropic
effects by simultaneously influencing two or more traits. Overall, the results
indicate that each panicle trait is controlled by several QTLs, genotype x
environment interaction, and a large number of epistatic interactions.