Multi-Trait Selection of Promising Advanced Lines of Rapeseed Using Selection Index of Ideal Genotypes

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Gholizadeh Amir; Amiri Oghan Hassan; Rameeh Valiollah; Bakhshi Behnam; Dalili Seyed Alireza; Kia Shahriar; Shariati Farnaz

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Journal Paper

Paper Information

Journal: JOURNAL OF PLANT GENETIC RESEARCH Year:2022 | Volume:9 | Issue:1 Page(s): 85-98

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Information Journal Paper

Title

Multi-Trait Selection of Promising Advanced Lines of Rapeseed Using Selection Index of Ideal Genotypes

Author(s)

Keywords

Phenotypic and genotypic coefficient of variation

Genetic correlation

Seed yield

Rapeseed

Promising advanced line

Abstract

Genetic diversity is key to breeding programs and increasing selection efficiency. In this study, 19 promising advanced lines (F7 generation) along with two cultivars, Dalgan and, RGS003 were evaluated in a randomized complete block design with three replications in three experimental field stations (Gorgan, Sari and, Zabol) during the 2020–2021 growing season. The highest phenotypic and genotypic coefficient of variations was found for number of lateral branches and number of pods per plant, respectively. The highest broad sense heritability was estimated for days to end of flowering, and days to start of flowering and the lowest broad sense heritability was estimated for the plant height. The genotypes G16, G18, G15, G1, G2, G5, and G20 with a higher SIIG values as well as a higher seed yield above average were introduced as superior genotypes with respect to yield and other agronomic traits. Therefore, these genotypes can be used for further testing, including adaptation tests. Also, the results of factor analysis and genetic correlation coefficients indicated a positive relationship between number of lateral branches, number of pods per plant and number of seeds per pod with seed yield and seed yield. Generally, it can be concluded that number of lateral branches, number of pods per plant and number of seeds per pod traits could be used as the appropriate criteria to select for increasing seed yield in rapeseed breeding programs.

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