Heritability and path coefficient analysis for important characters of yield component related to grain yield in M4 red rice mutant

Abstract

Abstract. Formation of new red rice cultivar through mutation breeding is reported in this study. Mutant lines of fourth generation have been planted and analysed. The purpose of the experiment were to determine the value of heritability and the direct and indirect effects of the characters of yield components on the grain. The experiments were prepared based on a randomized block design. Seven red rice mutant lines of fourth generation and one non-mutant origin as control were used as treatments. Data from yield components used were the number of productive tillers per hill, the number of grains per panicle, the panicle density,and grain weight per hill. Results showed that the characters of the productive tillers number per hill, the number of grains per panicle, the panicle density, and the grain weight per hill gave all high heritability values, i.e. 0.83, 0.83, 0.62, and 0.52, respectively. Based on the path coefficient analysis against these characters, that there were only two very important character and effective for screening in increasing grain yield per hectare of red rice cultivars, i.e.: the character of productive tillers number per hill and grain weight per hill.

Heritability and genetic advancement on agronomic characters of Toraja red rice x Inpari-4 white rice genotypes

“…To improve yield, we have explored various methods, including conventional cross-breeding with short-lived and high-yielding "Inpari-4" white rice variety (Limbongan et al 2019), and plant mutation using the heavy-ion beam (Sjahril et al 2020;Riadi et al 2018). Consequently, we have opted for conventional breeding to produce new varieties, which began with forming new populations through crossings to combine important agronomic characters from different parents.…”