Genetic Analysis of Tertiary Rice Panicle Branches

Tri Hastini,Hajrial Aswidinnoor,Willy Bayuardi Suwarno,Munif Ghulamahdi,Juwaidah Juwaidah,Z Rozaki,P Saiyut,M.M Tjale

doi:10.1051/e3sconf/202123203002

Abstract

Panicle branching trait of rice is one of the key factors in detemining grain yield. This study was aimed to elucidate the genetic inheritance pattern of the tertiary rice panicle branches trait. Six rice populations i.e F1, F1R, F2, F2R, BC1P1, and BC1P2 generation including parental lines were generated as materials. The experiment was conducted at IPB University, Bogor, Indonesia from April 2017 to February 2019. Several parameters of genetic inheritance was observed. The result revealed that the inheritance of the tertiary panicle branching was controlled by many genes with the high broad-sense heritability and the moderate narrow-sense ones. Based on the scaling test, it was observed that additive dominant model did not fit to the number of tertiary branches and the number of grains of tertiary panicle branches. These phenomenons suspected may due probably to the effect of epistasis. In the advanced analysis employed by using the joint scaling test revealed that the gene action of the number of tertiary branches and number of grains on the tertiary branches were additive and additive×additive.

Highlights

IntroductionRice panicle branching is one of the traits that related to rice economic trait
The economic and related-traits generally included into quantitative traits
Rice panicle branching is one of the traits that related to rice economic trait

Summary

Introduction

Rice panicle branching is one of the traits that related to rice economic trait. A large number of rice spikelet increased because of accommodation of extra those by secondary branches like in New Plant Type (NPT) rice [2]. In the last few recent years many researchers has conducted study in rice panicle branching and the mechanism of its formation [3]. Rice researchers has carried out the experiment related to panicle branching. There had been a report that the inheritance of panicle types of rice grouped by the nodal distribution pattern of the number of spikelet on the secondary panicle branches. Yang et al [4] studied panicle related genes through biochemical analysis, and it was revealed that there were complex regulations.

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Conclusion