Plant and Soil

, Volume 230, Issue 1, pp 99–105 | Cite as

QTLs and epistasis underlying activity of acid phosphatase under phosphorus sufficient and deficient condition in rice (Oryza sativa L.)

  • B. Hu
  • P. Wu
  • C.Y. Liao
  • W.P. Zhang
  • J.J. Ni


Eighty-four selected lines from a recombinant inbred (RI) line population of 284 lines derived from a cross between the indica varieties IR20 and IR55178-3B-9-3 were used in a hydroponic culture experiment with sufficient P supply (10 mg P L−1) and P-deficient stress (0.05 mg P L−1). After 2 weeks, the activity of acid phosphatase (AAP) in roots of each parent and each line from both normal culture and P-deficient stress was determined. QTLs for AAP, P-deficiency stress induced AAP (Psi-AAP) and relative AAP (RAAP) were detected using 178 molecular markers mapped on all 12 chromosomes based on single marker analysis and interval mapping. One QTL for AAP and three QTLs for Psi-AAP were detected on chromosome 1, 6 and 12, respectively. Two QTLs for RAAP were identical with these for Psi-AAP on chromosome 6 and 12. The results in this case indicated that the genetic system for Psi-AAP was different with that for AAP under normal culture. The AAP was mainly influenced by interaction among muti-factors, while Psi-AAP was controlled by a Psi genetic system.

activity of acid phosphotase (AAP) epistasis low-P stress Oryza sativa L. QTLs 


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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  1. 1.Department of Biological Science, College of Life ScienceZhejiang UniversityHongzhouChina

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