Genetic Analysis and Distribution of F2 Population Variety of Tomato  Crosses

Ihsan Syawal Rahmat,Muh. Farid BDR,Siti Antara Maedhani Tahara,M. Alfan Ikhsanul Amal,Nuriyah Magfiratul Fara Ramadhani

doi:10.31327/atj.v6i2.1592

Abstract

The demand for tomatoes is increasing along with population growth. However, this demand needs to be supported by increasing tomato productivity. One way to increase this is the assembly of high-yielding tomato varieties. In the assembly of varieties, the F2 generation is a generation with high diversity. This becomes important in the process of evaluating and selecting tomato varieties. Genetic variants are the initial capital of plant breeding efforts, which are related to the assembly of varieties to increase the quantitatively and quality of the yield including fruit size, fruit quality and productivity by utilizing the heterotic phenomenon in the assembly of tomato varieties. A research was conducted to evaluate the diversity of generations of biparental crosses using an augmented design. The genotypes used were Mawar (30 plants), Karina (30 plants), F1 genotype of Mawar x Karina (25 plants), Mawar x Karina x Mawar (20 plants), Mawar x Karina x Karina (20 plants), and F2 genotype of Mawar x Karina (200 plants) which were divided into 4 blocks. The results show that the genetic diversity of the F2 population was highest in the characters of plant height, harvest age, fruit length and fruit diameter, with heritability values in the medium to high category

Highlights

According to Saputra, Helfi Eka Saputra, Dwi Wahyuni Ganefianti, Umi Salamah, Yenny Sariasih, Nico Dwi Ardiansyah (2019). the crossover method is a method of uniting each of the superior characters that exist in various genotypes in one genotype so as to produce an F2 population that can segregate maximally
Heritability is a genetic parameter used to measure the ability of a genotype in a plant population to pass on its characters
Heritability estimates have functions including determining the success of selection, because they can provide clues that a trait is more influenced by genetic factors or environmental factors

Summary

Introduction

According to Saputra, Helfi Eka Saputra, Dwi Wahyuni Ganefianti, Umi Salamah, Yenny Sariasih, Nico Dwi Ardiansyah (2019). the crossover method is a method of uniting each of the superior characters that exist in various genotypes in one genotype so as to produce an F2 population that can segregate maximally. The estimation of genetic diversity, heritability, and the number of gene control groups of characters has been done extensively in this population. Analysis of this generation mean has been widely used to determine the type and magnitude of gene action involved in the inheritance of tomato characters. Heritability is a genetic parameter used to measure the ability of a genotype in a plant population to pass on its characters. The heritability value has a function to determine the success of the selection, because it can provide an indication of a trait that is more influenced by genetic factors or environmental factors. Sa’diyah (2013), genetic diversity and heritability are useful for predicting the genetic progress of selection

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Methods