研究报告

Genetic Analysis of Main Characteristics Related to Cold Tolerance in japonica Rice from Low-Latitude Plateau and High-Latitude Plain

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  • Yunnan Key Laboratory of Agricultural Biotechnology/Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China; *Corresponding author, E-mail: <A href=

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2009-09-10

Abstract

Six varieties including three varieties from lowlatitude plateau in Yunnan Province, China, and the other three from highlatitude plain in Japan and Korea and their 30 F1 crosses obtained by complete diallel crossing were planted under five different environments. The genetic model of additivedominancematernal effects (ADM) was applied to genetic analysis on four traits related to cold tolerance, i.e. spikelet fertility (SF), specific spikelet fertility (SSF), panicle exsertion (PE) and days to heading (DH). The results showed that SF and SSF were mainly affected by interaction effect between genotype and environment, with little maternal effect. Interaction heritability in broad sense between genotype and environment for SF and SSF were 63.5% and 56.5%, respectively, the highest compared with other effect values for heritability. Correlations between phenotype, genotype, additive and dominant effects of SF and those of SSF reached significant level with the correlation coefficients ranged from 0.717 to 1.000. Correlations between phenotype, genotype, additive and dominant effects of SF and those of PE also reached significant level with the correlation coefficients ranged from 0.161 to 0.975. The range of coefficient of variation varied with the traits, and that of PE were the maximum compared with other three traits. Hence PE was also a valuable trait in evaluation of cold tolerance. As for to PE and DH, their broadsense heritabilities were 59.6% and 81.4%, respectively, the biggest compared with other effect values for heritability. DH was mainly controlled by genetic effects, with the least influence by environmental conditions. The lowtemperature stress should be one of the essential conditions to breed varieties with cold tolerance. A cross between Ilpumbyeo and Kunmingxiaobaigu was an optimum combination for breeding new cold tolerant japonica variety at the booting stage.

Cite this article

XU Furong,TANG Cuifeng,YU Tengqiong,A Xinxiang,ZHANG Enlai,YANG Yayun,ZHANG Dunyu,DONG Chao,PENG Xinxi,DAI Luyuan* . Genetic Analysis of Main Characteristics Related to Cold Tolerance in japonica Rice from Low-Latitude Plateau and High-Latitude Plain[J]. Chinese Journal OF Rice Science, 2009 , 23(5) : 481 -488 . DOI: 10.3969/j.issn.10017216.2009.05.06

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