Zhaobin Jing^1,2 , Yanying Qu³ , Chen Yu¹ , Dajian Pan¹ , Zhilan Fan¹ , Jianyou Chen¹ , Chen Li¹

1. Institute of Rice, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, P.R. China
2. College of Horticulture, Northwest A & F University and Key Laboratory of Northwest Horticulture Plant Germplasm and Application of Ministry of Agriculture, Yangling, 712100, P.R. China
3. College of Agriculture, Xinjiang Agricultural University, Urumqi, 830052, P.R. China
Author    Correspondence author
Molecular Plant Breeding, 2010, Vol. 1, No. 1   doi: 10.5376/mpb.2010.01.0001
Received: 28 Jul., 2010    Accepted: 06 Aug., 2010    Published: 27 Sep., 2010

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Jing et al., 2010, QTL analysis of yield-associated traits using an advanced backcross population derived from common wild rice (Oryza rufipogon L), Molecular Plant Breeding Vol.1 No.1 (doi: 10.5376/mpb.2010.01.0001)

Wild rice (Oryza rufipogon L) is recognized as an important germplasm that has abundant genetic diversity and specific characters. Many of rice breeders attempt to utilize elite wild rice for rice genetic improvement and breeding program to broaden genetic background of cultivating rice. Although There are some reports that wild rice germplasms were successfully applied in rice breeding program, it is definitely depend on what we understand the traits in particular complex traits. In this research the goal was to identify alleles for yield and yield related components. An advanced backcross BC₃ population was generated by a cross between recurrent parent named  Yuexiangzhan and donor parent named G52-9, a wild rice collected in Gaozhou of Guangdong . This population was evaluated for 10 agronomic traits related to yield and yield related components. Forty three QTLs of ten traits were detected based on phenotypic data in this study. There are thirty eight QTLs of eight traits detected in continuing two years and thereinto nine QTLs consistently detected in two continuing years. It is also confirmed that nine QTLs mapped on the same or adjacent regions conferring the same traits by previous research. Two QTLs, qGYP-2-1 and qGYP-3-1 mapped on chromosome 2 and 3 can increase the yield of Yuexiangzhan by 40.05% and 49.04%, respectively, contributed from wild rice. Furthermore, the results show that many of detected alleles are likely associated with the trait with wild rice genetic background, which imply that Gaozhou wild rice should be used as excellent gene donor in rice breeding program.

Wild Rice (Oryza rufipogon L); Yield-associated Traits; Quantitative trait locus (QTL); Advanced backcross population; AB-QTL analysis