Reference "QTL and epistatic interaction underlying leaf chlorophyll and H2O2 content variation in rice (Oryza sativa L.)"

Reference ID

7975

Title

QTL and epistatic interaction underlying leaf chlorophyll and H2O2 content variation in rice (Oryza sativa L.)

Source

Acta genetica Sinica, 2003, vol. 30, pp. 245-250

Authors (7)

Yang-Q-H	Lu-W
Hu-M-L	Wang-C-M
Zhang-R-X	Yano-M
Wan-J-M

Abstract

It is meaningful to study the genetics of the traits associated with
photosynthesis such as leaf chlorophyll and H2O2 contents for high yield
breeding in rice. A mapping population of 98 BC1F9 lines (backcross Inbred
Lines, BIL), derived from a backcross of Nipponbare
(japonica)/Kasalath(indica)//Nipponbare by the single-seed-descent methods, was
employed to map quantitative trait loci (QTL) underlying such rice traits as
leaf chlorophyll and H2O2 contents. Five and two QTLs were detected for leaf
Chlorophyll and H2O2 content variation, respectively. Among the QTLs detected,
q-Chl1 on chromosome 1 accounted for 22% variation for leaf chlorophyll content
variation. The alleles from Nipponbare increased stature at the locus; On the
other hand, q-H2O2(1) which associated with H2O2 content was also located on the
same region as q-Chl1. The alleles from Nipponbare decreased stature at this
locus. The 2 traits have the 2 QTL sharing the same chromosome locations, which
was located between C86 and C813 on chromosome 1. Epistasis analysis showed QTL
with interaction distributed on chromosome 2, 6, 11 and 12. However, no QTL
interacted with q-Chl1 or q-H2O2(1) was detected. It can be deduced that alleles
from Nipponbare at the region between C86 and C813 on chromosome 1 increases
leaf chlorophyll content and decreases H2O2 content at the mean time with
significant additive effect but little epistasis.