Genetics of amylose content in rice (Oryza sativa L.)

Kumar, Ish ; Khush, G. S. (1986) Genetics of amylose content in rice (Oryza sativa L.) Journal of Genetics, 65 (1-2). pp. 1-11. ISSN 0022-1333

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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 in between 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.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Oryza sativa; Amylose Content; Inheritance; Dosage Effect; Endosperm; Chemical Composition; Cooking Quality
ID Code:37829
Deposited On:23 Apr 2011 12:51
Last Modified:17 May 2016 20:44

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