Knowledge Center Catalog

Screening advanced bread wheat lines for grain yield potential under grass weed infestation

By: Contributor(s): Material type: TextTextPublication details: Addis Ababa (Ethiopia) CIMMYT : 1999ISBN:
  • 92-9146-058-3
Subject(s): Summary: During 1997, a multi-location study was conducted to assess differences in grain yield (GY) potential, under conditions of high weed infestation in the field, among 20 genotypes of bread wheat previously selected for high GY potential under weed-free conditions. Avena sativum was used as a proxy for grass weeds. The GY of wheat varied from 982 to 1951 for the 20 genotype means {i.e., averaged across the 3 locations). The two recently-released cultivars HAR 1685 and HAR 604 were significantly higher yielding than all other entries in the trial with the exception of entry 19 ( advanced line HAR 1918): At one site (Holetta), oat biomass yield was significantly and negatively correlated with wheat seedlings m-2 (WSM), wheat biomass at tillering and anthesis, and wheat GY. This suggests that higher initial wheat seedling stands and more productive canopies for specific wheat genotypes facilitated the suppression of wild oat biomass production. Similarly, the density of oat panicles m-2 at maturity was negatively affected by WSM, wheat spikes m-2 at maturity , and wheat biomass at tillering and anthesis. Oat height at maturity was significantly related to wheat height at tillering and to wheat biomass at tillering.
Tags from this library: No tags from this library for this title. Log in to add tags.
Star ratings
    Average rating: 0.0 (0 votes)
Holdings
Item type Current library Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library CIMMYT Publications Collection Look under series title (Browse shelf(Opens below)) 1 Available 1B629146
Total holds: 0

During 1997, a multi-location study was conducted to assess differences in grain yield (GY) potential, under conditions of high weed infestation in the field, among 20 genotypes of bread wheat previously selected for high GY potential under weed-free conditions. Avena sativum was used as a proxy for grass weeds. The GY of wheat varied from 982 to 1951 for the 20 genotype means {i.e., averaged across the 3 locations). The two recently-released cultivars HAR 1685 and HAR 604 were significantly higher yielding than all other entries in the trial with the exception of entry 19 ( advanced line HAR 1918): At one site (Holetta), oat biomass yield was significantly and negatively correlated with wheat seedlings m-2 (WSM), wheat biomass at tillering and anthesis, and wheat GY. This suggests that higher initial wheat seedling stands and more productive canopies for specific wheat genotypes facilitated the suppression of wild oat biomass production. Similarly, the density of oat panicles m-2 at maturity was negatively affected by WSM, wheat spikes m-2 at maturity , and wheat biomass at tillering and anthesis. Oat height at maturity was significantly related to wheat height at tillering and to wheat biomass at tillering.

Global Maize Program

English

0007|AGRIS 0101|R99-00CIMPU|AL-Wheat Program

Jose Juan Caballero

INT2937

CIMMYT Publications Collection


International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2021.
Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
If you have any question, please contact us at
CIMMYT-Knowledge-Center@cgiar.org