当前位置: X-MOL 学术Euphytica › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Grain yield and stability of tropical maize hybrids developed from elite cultivars in contrasting environments under a rainforest agro-ecology
Euphytica ( IF 1.9 ) Pub Date : 2020-05-19 , DOI: 10.1007/s10681-020-02620-y
C. E. Eze , R. O. Akinwale , S. Michel , H. Bürstmayr

In the maize producing regions of Sub-Saharan Africa (SSA), compounding effects of genotype-by-environment interaction have necessitated breeding maize for outstanding performance and stability across varying environments. This study was conducted to assess the performance and stability of late-maturing cultivars and their respective hybrids evaluated under contrasting environments in the tropical rainforest region. We evaluated 108 genotypes in field trials under three different growing conditions in 2018 involving 14 open-pollinated parents and their hybrids derived from a diallel mating design. The genotypes were evaluated under field conditions using 9 × 12 alpha lattice design with three replications in six environments. The genotypes were divided into three groups, containing either the parents, hybrids or checks, for estimating the stability variance and grain yield. The difference between the lowest and highest yielding environment was 3.9 t ha −1 , while the repeatability of the grain yield trials ranged from 39 to 80%. The average grain yield of the hybrids (2.33 t ha −1 ) was significantly higher than that of the parents (2.19 t ha −1 ) and the check varieties (2.03 t ha −1 ). The hybrids were more stable than both the parents and the checks. They also showed a higher stability against a common group of the parents and checks. The results of this study suggest that high yielding and stable population hybrids can be utilized in breeding programmes aiming to provide improved varieties for the large number of rural maize farmers in the SSA zone, who often lack access or the capacity to purchase commercial hybrids.

中文翻译:

热带雨林农业生态下对比环境下由优良品种培育的热带玉米杂交种的产量和稳定性

在撒哈拉以南非洲 (SSA) 的玉米产区,基因型与环境相互作用的复合效应使得育种玉米在不同环境中具有出色的性能和稳定性。本研究旨在评估在热带雨林地区对比环境下评估的晚熟品种及其各自杂交种的性能和稳定性。我们在 2018 年三种不同生长条件下的田间试验中评估了 108 种基因型,涉及 14 个开放授粉的亲本及其源自双列交配设计的杂种。在田间条件下使用 9 × 12 α 晶格设计评估基因型,在六个环境中重复三次。基因型分为三组,包含亲本、杂种或检查,用于估计稳定性方差和谷物产量。最低和最高产量环境之间的差异为 3.9 t ha -1 ,而谷物产量试验的可重复性在 39% 到 80% 之间。杂种的平均籽粒产量(2.33 t ha -1 )显着高于亲本(2.19 t ha -1 )和对照品种(2.03 t ha -1 )。杂种比亲本和检查都更稳定。他们还表现出对一组共同的父母和支票的更高稳定性。这项研究的结果表明,高产和稳定种群的杂交品种可用于育种计划,旨在为 SSA 地区的大量农村玉米农民提供改良品种,他们往往缺乏购买商业杂交品种的机会或能力。最低和最高产量环境之间的差异为 3.9 t ha -1 ,而谷物产量试验的可重复性在 39% 到 80% 之间。杂种的平均籽粒产量(2.33 t ha -1 )显着高于亲本(2.19 t ha -1 )和对照品种(2.03 t ha -1 )。杂种比亲本和检查都更稳定。他们还表现出对一组共同的父母和支票的更高稳定性。这项研究的结果表明,高产和稳定种群的杂交品种可用于育种计划,旨在为 SSA 地区的大量农村玉米农民提供改良品种,他们往往缺乏购买商业杂交品种的机会或能力。最低和最高产量环境之间的差异为 3.9 t ha -1 ,而谷物产量试验的可重复性在 39% 到 80% 之间。杂种的平均籽粒产量(2.33 t ha -1 )显着高于亲本(2.19 t ha -1 )和对照品种(2.03 t ha -1 )。杂种比亲本和检查都更稳定。他们还表现出对一组共同的父母和支票的更高稳定性。这项研究的结果表明,高产和稳定种群的杂交品种可用于育种计划,旨在为 SSA 地区的大量农村玉米农民提供改良品种,他们往往缺乏购买商业杂交品种的机会或能力。而谷物产量试验的可重复性在 39% 到 80% 之间。杂种的平均籽粒产量(2.33 t ha -1 )显着高于亲本(2.19 t ha -1 )和对照品种(2.03 t ha -1 )。杂种比亲本和检查都更稳定。他们还表现出对一组共同的父母和支票的更高稳定性。这项研究的结果表明,高产和稳定种群的杂交品种可用于育种计划,旨在为 SSA 地区的大量农村玉米农民提供改良品种,他们往往缺乏购买商业杂交品种的机会或能力。而谷物产量试验的可重复性在 39% 到 80% 之间。杂种的平均籽粒产量(2.33 t ha -1 )显着高于亲本(2.19 t ha -1 )和对照品种(2.03 t ha -1 )。杂种比亲本和检查都更稳定。他们还表现出对一组共同的父母和支票的更高稳定性。这项研究的结果表明,高产和稳定种群的杂交品种可用于育种计划,旨在为 SSA 地区的大量农村玉米农民提供改良品种,他们往往缺乏购买商业杂交品种的机会或能力。19 t ha -1 ) 和对照品种 (2.03 t ha -1 )。杂种比亲本和检查都更稳定。他们还表现出对一组共同的父母和支票的更高稳定性。这项研究的结果表明,高产和稳定种群的杂交品种可用于育种计划,旨在为 SSA 地区的大量农村玉米农民提供改良品种,他们往往缺乏购买商业杂交品种的机会或能力。19 t ha -1 ) 和对照品种 (2.03 t ha -1 )。杂种比亲本和检查都更稳定。他们还表现出对一组共同的父母和支票的更高稳定性。这项研究的结果表明,高产和稳定种群的杂交品种可用于育种计划,旨在为 SSA 地区的大量农村玉米农民提供改良品种,他们往往缺乏购买商业杂交品种的机会或能力。
更新日期:2020-05-19
down
wechat
bug