J Integr Plant Biol. ›› 1995, Vol. 37 ›› Issue (2): -.

• Research Articles •    

Distorted Segregations of RFLP Markers and Their Distribution on Chromosomes in an indica/japonica F2 Population of Rice (Oryza sativa L.)

Xu Yun-bi, Shen Zong-tan, Chen Ying and Zhu Li-huang   

Abstract: he segregation ratio of RFLP markers in an F2 population from indica "Zhaiyeqing 8” and japonica "Jingxi 17' of rice (Oryza sativa L., 2n= 24) was studied using 54 RFLP markers distributed on 12 chromosomes. Distorted segregation was found in 25.9% of the marker tested, which was indicated by significant deviation from the expected Mendelian segregation ratio ( I: 2: 1) at 5% or 1% level. Among the three RFLP genotypes of the F2 population “Zhaiyeqing” 8 genotype was significantly more than the expected, and its gene frequency was up to 52.1 %. Three positions for distorted segregation were found on chromosome 3 (RG227-RG369), 7 (RG678-RG511-RG528) and 12 (RG463-RG323). These positions could be related to gametophyte loci responsible for the distortion.

Key words: Restriction fragment length polymorphism markers, Distorted segregation, Chromosome distribution, Indica/japonica hybrid, Oryza sativa

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