《Table 2 Phenotypic differences between two rice landraces with the maximum or the minimum genetic d

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《农户保存与种质库保存的同近名地方稻品种的遗传多样性研究（英文）》

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EP:effective panicles；NEP:effective panicles per plant；WRP:whole reproductive period；PH:plant height；PL:panicle length；NPP:number of panicles per plant；NFGP:number of filled grains per panicle；NGP:number of grains per panicle；NFG:number of filled grains；T

The variations between the materials decrease with the phenotypic genetic distance.According to the cluster analysis of 14 phenotypic traits（Table 2），there were not the paired materials with a genetic distance at 0，suggesting that no phenotypes were the same in the tested materials.The phenotypic genetic distance presented great variations in the different groups.The maximal genetic distance varied from 2.11（D1 Bendinuogu/D2 Bendinuo）to8.50（R1 Guiziai/R3 Bendizhandao）and the minimalgenetic distance from 0.19（R28 Shuidao （nuo）/R38Xishuinuo） to 1.51（D2 Bendinuo/D5 Bendinuogu）.In the household conservation，D1（Bendinuogu）and D2（Bendinuo）had similar names but were significantly different in the PH，WFL and NEP.R1（Guiziai）and R3（Bendizhandao）presented extreme significant differences in the PH，WFL，SS，NFGP，PL，TGW，length-width ratio of rice grain（Grain L/W Ratio），GW and GD.No significant variation was found between R28（Shuidao （nuo）） and R38（Xishuinuo）.D2（Bendinuo）and D5（Bendinuogu）had extreme significant difference in the NGP and NFGP.There was a difference of over 5 d in the whole growth period（WGP）between the materials within the same group，including A1（Household Honggu）/A3（Genebank Honggu），B2（Household Hongmidongzhan）/B3（Genebank Hongmidong zhan），C2（Household Sanlicundao）/C6（Genebank Sanlicun），and F1（Household Guichao）/F2（Genebank Guichao 13）.The maximal difference in the WGP was found between Household B2（Hongmidong z h a n）a n d G e n e b a n k B 3（H o n g m i d o n g z h a n），presenting a 30 d gap.These data indicated that extreme significant differences in the phenotypic traits do exist between the tested same-or similar-name materials as well as those conserved by farmers and Hunan genebank.