Construction of Near Isogenic Lines for Pericarp Color and Evaluation on Their Near isogenicity in Rice |
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Authors: | WANG Xiao-guang JI Zhi-juan CAI Jing MA Liang-yong LI Xi-ming YANG Chang-deng |
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Institution: | State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China |
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Abstract: | The inheritance of purple pericarp was studied through genetic analysis using F2, BC1F1 and F3 from a cross between a purple pericarp rice variety Zixiangnuo and a white pericarp rice variety Chunjiangnuo 2. Seven pairs of near isogenic lines (NILs) for pericarp color of rice were further constructed. Genetic analysis indicated that the purple pericarp was controlled by two complementary genes (Pb and Pp). Agronomic trait analysis and polymorphism analysis using SSR markers on these seven pairs of NILs were used in the evaluation of near-isogenicity. No significant differences in agronomic traits were found except 1000-grain weight between the NILs. The polymorphic SSR markers for the parents were only detected in target segments of the five pairs of NILs different in Pb, which revealed the ideal near isogenicity of them. However, for the two pairs of NILs different in Pp, the polymorphic markers for the two parents were detected as well as in non-targeted segments of chromosomes 11 and 12, respectively. |
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Keywords: | pericarp color near isogenic line agronomic trait molecular marker near isogenicity rice |
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