Biodiversity Science ›› 2006, Vol. 14 ›› Issue (6): 479-487.doi: 10.1360/biodiv.060189

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Genetic diversity in japonica rice landraces (Oryza sativa) from the Taihu Lake region

Weidong Jin1, 2, Delin Hong1*   

  1. 1 State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095
    2 Suzhou Institute of Rural Cadre, Suzhou, Jiangsu 215011
  • Received:2006-09-04 Revised:2006-10-19 Online:2006-11-20
  • Delin Hong

The Taihu Lake region has a long history of cultivating rice (Oryza sativa L. sub. japonica) and has a high yield of rice. However, the genetic basis of rice varieties is becoming more and more narrow, which may result in potential risk to agricultural production. In order to enlarge the genetic basis of rice varieties by virtue of local varieties, we examined the genetic diversity of 823 varieties of japonica rice landraces from Taihu Lake region. We found that, among the 19 traits studied, the coefficient of variation of 15 quantitative traits ranged from 4.6% (seed setting rate) to 33.7% (yield per plant). There existed 10 phenotypes for husk color, 6 for apiculus color, 5 for awn type, and 4 for grain shape, respectively. For the 19 traits, the phenotypic diversity index (H′) ranged from 0.757 (grain shape) to 1.930 (filled grains per panicle), av-eraging 1.540. Phenotypic variance of accessions headed after 10 September was larger than that of acces-sions headed before 10 September (including this day). Principal component analysis showed that plant height, panicles per plant, spikelets per panicle, filled grains per panicle, spikelet density, 1,000-grain weight, yield per plant, and panicle neck length were important traits in explaining the phenotypic diversity of japon-ica rice landraces from the Taihu Lake region.

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[1] Meng Han, Xin-Kai Wu, Ming Tu, Tatiana M. Kodrul and Jian-Hua Jin. Diversity of Menispermaceae from the Paleocene and Eocene of South China[J]. J Syst Evol, 0, (): 0 .
[2] Tsiang Ying, Li Ping-T’ao. Praecursores Florae Asclepiadacearum Sinensium[J]. J Syst Evol, 1974, 12(1): 79 -150 .
[3] HUANG Yong-Jiang-, ZHU Hai-, CHEN Wen-Yun-, ZHOU Zhe-Kun. Intraspecific Variation in Samara Morphology of Acer and Its Implication in Fossil Identification[J]. Plant Diversity, 2013, 35(3): 295 -302 .
[4] HUANG Zhen-Ying, Yitzchak GUTTERMAN. Comparison of Germination Strategies of Artemisia ordosica with Its Two Congeners from Deserts of China and Israel[J]. J Integr Plant Biol, 2000, 42(1): 71 -80 .
[5] Qi Qiuhui. A Preliminary Study on the Relationship Between Density and Extinction Coefficient (k Value) in Millet Community[J]. Chin J Plan Ecolo, 1984, 8(1): 67 -73 .
[6] Hongwen Huang, Zheng Zhang. Current status and prospects of ex situ cultivation and conservation of plants in China[J]. Biodiv Sci, 2012, 20(5): 559 -571 .
[7] Cem VURAL, Servet ÖZCAN, Mikail AKBULUT. New combination in Veronica (Scrophulariaceae s.l.) based on morphological characters and the seed storage protein polymorphism[J]. J Syst Evol, 2009, 47(2): 168 -172 .
[8] Xin-Hui ZOU; Song GE*. Conflicting gene trees and phylogenomics[J]. J Syst Evol, 2008, 46(6): 795 -807 .
[9] Sun Tian-ren, Tang Li-jun, Wei Ze-chang, Wu Da-yu, Wang Xi-rong, Zhang De-hui, Liu Nian-gui. Study on the Biomass Structure of Phyllostachys heteroclada[J]. Chin J Plan Ecolo, 1986, 10(3): 190 -198 .
[10] Zhu Zhicheng. A Preliminary Studies on the Plotycladus orientalis Forests in the Qinling Mountain and the Loess Plateau of Northern Shaanxi Province[J]. Chin J Plan Ecolo, 1984, 8(4): 279 -293 .