Heritability of agronomic traits correlated with reduced stink bug damage in an F2:3 soybean population derived from IAC-100

Michelle Da Fonseca Santos, Milene Möller, Steven J. Clough, José Baldin Pinheiro

Research output: Contribution to journalArticle

Abstract

In Brazil, some of the most important insect pests causing damage to soybean (Glycine max) are stink bugs. Soybean production would increase if varieties with enhanced resistance were developed. The aim of this work was to examine different traits associated with plant development, and yield-related traits, in an F2:3 soybean population in a stink bug-infested field and to evaluate genetic parameters and correlations among those traits. The parents and progeny from 229 F2 plants developed by crossing a resistant cultivar (IAC-100) with a susceptible cultivar (CD-215) were evaluated in three replications in a single environment. Seven agronomic traits and eight indicators of insect resistance were measured. Genotypes showed significant differences for all traits except lodging. The grain-filling period exhibited a positive genotypic correlation of 0.66 with hundred-seed weight, whereas a negative genotypic correlation of −0.53 was found between pod damage index (%) and weight of healthy seeds. In general, a shorter pod-filling period, lower weight of hundred-seeds, lower indices of pod damage, and higher seed-yield per plant were phenotypic traits of genotypes resistant to these insects.

Original languageEnglish (US)
Pages (from-to)1-18
Number of pages18
JournalJournal of Crop Improvement
Volume32
Issue number1
DOIs
StatePublished - Jan 2 2018

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Keywords

  • Glycine max
  • IAC-100
  • Piezodorus guildinii
  • insect resistance

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Soil Science
  • Plant Science

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