<b>Bromatological characteristics and ruminal digestibility of grain corn hybrids with different vitreousness in silage maturity

Abstract

ABSTRACT. The aim of this research was to evaluate vitreousness in commercial corn hybrids with flint and dent grains and to study the effect of this characteristic on agronomic behavior, nutritional value, and ruminal degradability of grains harvested in silage maturity. Twelve commercial corn hybrids were evaluated. They were divided in two groups (six with flint grains and six with dent grains). The experiments were conducted in two municipalities represented by Guarapuava and Laranjeiras do Sul, both in Paraná State. The harvest for the grain quality analysis was performed at ¾ of the milk line stage in the grain. The following characteristics were evaluated: grain yield, grain yield in silage maturity, vitreousness, ruminal digestibility of grain, neutral detergent fiber, acid detergent fiber and crude protein. The grains in the group of dent hybrids exhibited better degradability associated with lower vitreousness than the group of flint hybrids. The group of dent hybrids exhibited better ruminal digestibility of the grains associated with lower vitreousness versus the group of flint hybrids. There is a negative correlation between vitreousness and the digestibility of the grain; thus, vitreousness can be a criterion for selecting genotypes for forage production.

Physicochemical properties of vitreous and floury endosperm flours in maize

“…Vitreous endosperm with the compacted and well‐developed protein matrix (Zhang et al, ) produces hard kernels, and this type of maize kernel is often used for nixtamalized and extruded products (Juárez‐García, Agama‐Acevedo, Gómez‐Montiel, Pando‐Robles, & Bello‐Pérez, ). On the contrary, floury endosperm with discontinuous protein matrix (Gayral et al, ) causes soft kernels, and this type of maize kernel is usually applied to produce flour (Juárez‐García et al, ) and feeding (Rossi et al, ) since the kernels break apart easily. In order to well direct the use for maize endosperm, there is a need to characterize their properties and differences between vitreous and floury endosperms.…”

“…endosperm with discontinuous protein matrix (Gayral et al, 2016) causes soft kernels, and this type of maize kernel is usually applied to produce flour (Juárez-García et al, 2013) and feeding (Rossi et al, 2016) since the kernels break apart easily. In order to well direct the use for maize endosperm, there is a need to characterize their properties and differences between vitreous and floury endosperms.…”

Assessment of agronomic performance and prediction of genetic gains through selection indices in silage corn

“…According to Rossi et al (2016), the group of dent hybrids exhibited better ruminal digestibility of the grains associated with lower vitreousness versus the group of flint hybrids. Cruz et al (2004) considers that the selection of genotypes should be based on several favorable agronomic traits, gand pursue the simultaneous breeding of such traits.…”

A meta-analysis on in situ ruminal degradability of grains and meals for energy concentrate feeds

“…However, other factors also could affect the degradability of the feeds as cultivar (Rossi et al, 2016), feed origin like coproduct or others (Busanello et al, 2016a;Lee et al, 2016), soluble carbohydrate content (Poorkasegaran and Yansari, 2014), neutral detergent fibre (NDF) and acid detergent fibre (ADF) (Busanello et al, 2016b;Lee et al, 2016).…”