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Genetics of amylose content in rice (Oryza sativa L)


Inheritance of amylose content was studied in crosses involving very low-, intermediate-, and high-amylose parents. The single-grain analysis of parents, F1, F2, B1F1, and B2F1 seed from a single-season harvest, showed that the parental mean difference of 14–17 % in IR37307-8/BPI 121-407 or IR37307-8/IR24632-34 and about 20% in the cross IR37307-8/IR8 were controlled by a single gene with major effect, along with some minor genes and/or modifiers. The appearance of segregants inbetween the two parents was attributed to gene dosage effects in the endosperm. The results indicate that selection for amylose level can effectively be done in early segregating generations. Selection for intermediary segregants would be ineffective because the dosage effects would dissipate in further generations.

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  1. Bollich C N and Webb B D 1973 Inheritance of amylose content in two hybrid populations of rice.Cereal Chem. 50:631–636

    Google Scholar 

  2. Chang W L and Li W Y 1981 Inheritance of amylose content and gel consistency in rice.Bot. Bull. Acad. Sinica 22: 35–47

    CAS  Google Scholar 

  3. Chauhan J S and Nanda J S 1983 Inheritance of amylose content and its association with grain yield and yield contributing characters in rice.Oryza 20: 81–85

    CAS  Google Scholar 

  4. Ghosh A K and Govindaswamy S 1972 Inheritance of starch iodine blue value and alkali digestion value in rice and their genetic association.II Riso 21: 123–132

    Google Scholar 

  5. Heu M H and Park S Z 1976a Dosage effect of waxy allele on the amylose content of rice grain. I. Amylose content of hybrid seeds obtained from isogenic lines for glutinuous and base colour.Korean J. Breed. 8: 48–54

    CAS  Google Scholar 

  6. Heu M H and Park S Z 1976b Dosage effect of waxy gene on the amylose content of rice grain. II. Amylose content of hybrid seeds obtained from male sterile stocks.Seoul Natl. Univ. Coll. Agric. Bull. 1: 39–46

    Google Scholar 

  7. IRRI 1976 Annual report for 1975, International Rice Research Institute, Los Bafios, Philippines, pp. 479

    Google Scholar 

  8. Juliano B O 1971 A simplified assay for milled rice amylose.Cereal Sci. Today 16: 334–338, 340, 360

    Google Scholar 

  9. McKenzie K S and Rutger J N 1983 Genetic analysis of amylose content, alkali spreading and grain dimension in rice.Crop Sci. 23: 306–313

    CAS  Google Scholar 

  10. Okuno K 1978 Gene dosage effect of waxy alleles on amylose content in endosperm starch of rice.Jpn. J. Genet. 53: 219–222

    Article  CAS  Google Scholar 

  11. Okuno K, Fuwa H and Yano M 1983 A new mutant gene lowering amylose content in endosperm of rice,Oryza Sativa L.Jpn. J. Breed. 33: 387–394

    CAS  Google Scholar 

  12. Okuno K and Yano M 1984 New endosperm mutants modifying starch characteristics of rice,Oryza sativa L.Jpn. Agric. Res. Q. 18: 73–84

    Google Scholar 

  13. Puri R P, Siddiq E A and Mehra R B 1980 Studies on cooking and nutritive qualities of cultivated riceOryza Sativa L. II. Quantitative genetic characterisation of amylose content.Genet. Agrar. 34: 15–34

    Google Scholar 

  14. Seethararnan R 1959 The inheritance of iodine value in rice and its association with other characters.Diss. Abstr. Int. 20: 856

    Google Scholar 

  15. Stansel J W 1966 The influence of heredity and environment on endosperm characteristics of rice (Oryza. sativa).Diss. Abstr. Int. 27: 48B

    Google Scholar 

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Correspondence to Ish Kumar or G S Khush.

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Kumar, I., Khush, G.S. Genetics of amylose content in rice (Oryza sativa L). J. Genet. 65, 1–11 (1986).

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  • Oryza sativa
  • amylose content
  • inheritance
  • dosage effect
  • endosperm
  • chemical composition
  • cooking quality