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| Identification of QTLs for Yield Traits in the BC1F5 Population of Xieqingzao B//Xieqingzao B/Dongxiang wild rice |
| jie yun Zhuang |
| 浙江省富阳市水稻所路28号中国水稻研究所基因定位，邮编：311401 |
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Abstract A BC1F5 population consisting of 202 lines developed from Xieqingzao B//Xieqingzao B/Dongxiang wild rice was tested for yield traits in two years in the same trial site. A total of 23 QTLs for yield traits were detected using a linkage map consisting of 149 markers. The numbers of QTLs detected for individual traits were two for the number of panicle per plant (NP), four for the number of filled grains per panicle (NFGP), six for the total number of spikelets per panicle (TNSP), five for spikelet fertility (SF), four for 1000-grain weight (TGWT) and two for grain yield per plant (GYD). Nine of the QTLs had the enhancing alleles from the Dongxiang wild rice, including two for NP, one for NFGP, five for TNSP and one for TGWT. Six of them were located in intervals where QTLs for yield traits have been reported in other studies using interspecies populations of rice. The 23 QTLs were distributed in all the 12 rice chromosomes except chromosome 11. Eighteen of the QTLs were located in eight clusters. The enhancing alleles were from Xieqingzao B in four clusters and from the Dongxiang wild rice in two clusters, while the allelic direction in the remaining clusters varied for different traits. Work is underway to construct populations for fine mapping the QTLs.
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Received: 25 February 2008
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Corresponding Authors:
jie yun Zhuang
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