Inheritance Of Amylose Content And The Relationship Between Grain Appearance Quality Trains And Amylose Content In Rice Genotypes In Uganda
Journal Title: IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) - Year 2018, Vol 11, Issue 11
Abstract
Amylose content and grain appearance quality of rice (Oryza sativa L.) represent a major problem of rice marketing in many rice producing areas in the world. In Uganda cooking and eating quality and that of the appearance quality remain undefined in the rice breeding program. The objective of this study was to determine the amylose content and to understand the inheritance patterns of amylose content and possible relationships between grain appearance quality traits and amylose content in rice in Uganda. Forty genotypes were planted in two seasons (2015B and 2016A) in alpha lattice design at national crop resource research institute with three replications to characterize for amylose content and grain appearance quality traits. Seven parents involving 3 low, 4 intermediate amylose content genotypes were crossed in a half diallel and the F1 were advanced to F2 generation which together with parents were planted in the field in alpha lattice design in three replications. The results showed that amylose content (AC), Kernel width (KW) and kernel length to width ratio (K/L) were affected by both genetic effects and genotype by season (G x S) interaction while kernel length (KL) was mainly affected by genetic factors. Genotypes were grouped into low, intermediate and high amylose content categories. AC correlated weakly negatively with the physical appearance quality traits of the grain implying that improvement of amylose content in grains would not affect grain size and shape. There were significant differences (P ≤ 0.001) among the parents for general combining ability (GCA) and crosses for specific combining ability (SCA) (P ≤ 0.5) for amylose content, indicating that both additive and non-additive gene actions were responsible in the inheritance of AC, however, the variance component for GCA was larger than the variance component for SCA implying that the inheritance of amylose content was more conditioned by the additive gene effect.
Authors and Affiliations
Kitara I. O. , Lamo J, Edema R. , Gibson P. , Rubaihayo P.
Keywords
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- EP ID EP409220
- DOI 10.9790/2380-1111012634.
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