Reference "Detection and verification of quantitative trait loci affecting tolerance to low phosphorus in rice"

Reference ID

7822

Title

Detection and verification of quantitative trait loci affecting tolerance to low phosphorus in rice

Source

Journal of Plant Nutrition, 2001, vol. 24(9), pp. 1399-1408

Authors (5)

Ming-F	Zheng-X
Mi-G	Zhu-L
Zhang-F

Abstract

Phosphorus (P)-deficiency in rice (Oryza sativa L.) may cause yields reductions.
This research was conducted to map quantitative trait loci (QTL) for tolerance
to low-P stress in a double-haploid (DH) line, and to verify these loci in
another SSD9 population, which is the ninth generation of single-seed-
distribution population derived from the same parents. Two populations were
cultured solution at different period. By using the linkage map, QTLs for traits
associated with tolerance to low-P stress were located. Results indicated that
for DH population, one restricted fragment length polymorphism (RFLP) marker
located on chromosome 6 was closely associated with relative root dry weight,
relative shoot dry weight, and relative total dry weight. Two QTLs affected
relative P uptake content. One micro-effect QTL was found to be associated with
relative P utilization efficiency. For relative amounts of root exuded acid
phosphatase, relative P allocation between shoot and root, relative plant P
concentration, and relative shoot P concentration, one micro-effect QTL was
detected for each one. Quantitative trait loci for 3 traits were detected for
both DH and SSD9 populations, but the loci for each located trait were
inconsistent between two populations; the reason for inconsistency in QTLs was
analyzed. The main reason could be the difference in solution environment.