Inheritance Studies of Amylose Content, Yield and Grain Quality Characters in Different Rice Genotypes (Oryza sativa L.) | ||
| Journal of Plant Production | ||
| Article 8, Volume 12, Issue 6, June 2021, Pages 645-650 PDF (951.23 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2021.79720.1034 | ||
| Author | ||
| Nessreen N. Bassuony* | ||
| rice research and training center | ||
| Abstract | ||
| Breeding for produced new rice varieties with good grain quality especially for low amylose content has become one of the most important goals in plant breeding programmes. In this experiment, three rice genotypes(Giza178, Giza175 and IR64) were used as a perants to study the inheritance amylose content, heritabilityand genetic parameters for grain yield per plant, 1000-grains weight, grain length, grain shape, hulling%, milling%, head rice% and gelatinization temperature characters. A randomized complete block design (RCBD) was used with three replications for six generations viz., P1, P2, F1, F2, BCP1 and BCP2 of a cross between Giza 178 (low amylose content) x Giza 175 (high amylose content) (cross I) and Giza178 (low amylose content) x IR64 (intermediate amylose content) (cross II) were used for the study. The results showed that the F1 plants of cross I gave intermediate amylose content in the endosperm 22.58%, while, the amylose content of F2 plants varied from 13.10 to 35%. and classified into two categories, i.e. 13.10-19 % and 20.50 -35 %.. These results indicated that high amylose content was incompletely dominant over low amylose. Cross II (Giza 178/IR64) low amylose content parent (Giza178) and intermediate amylose parent (IR64) gave 19.84% amylose content in F1 plants, while in F2 grains amylose values ranged from9.5 to 24.1. The plants could be classified into 3 categories. Category 1 with 9.5% - 11% a, category 2 (14.5-19.05%) and Category 3 (21.1-24.1%). Selection for intermediary segregates would be ineffective because the dosage effects would dissipate in further generations. | ||
| Keywords | ||
| Rice; Amylose; additive; gene action; heritability | ||
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