Generation mean analysis of Striga hermonthica resistance in pearl millet (Pennisetum glaucum [L.] R. Br.)

IF 1 Q3 AGRONOMY Journal of Crop Improvement Pub Date : 2022-12-15 DOI:10.1080/15427528.2022.2156960

Armel Rouamba, H. Shimelis, Inoussa Drabo, A. Shayanowako, E. Mrema, P. Gangashetty

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Abstract

ABSTRACT Striga hermonthica [Del.] Benth. (Sh) is a noxious parasitic weed causing substantial yield loss in sub-Saharan Africa’s pearl millet. The objective of this study was to determine the gene action and inheritance of Sh resistance in newly developed pearl millet populations to guide selection and genetic advancement. Bi-parental crosses were derived from pairs of pearl millet lines by contrasting reactions to Striga infestations. The two sets of parental lines, F1s, F2s, and backcrosses, were evaluated using a randomized complete block design with three replications. Data on the number of Striga counted at 60 and 80 days after planting were collected. The analysis of the variance showed significant (P < 0.001) differences among the generations across sets for Sh parameters. Duplicate gene action controlled the inheritance of the number of emerged Sh. Unique F2 individuals with Sh resistance were selected from the two sets for genetic advancement through recurrent selection methods for pearl millet variety development by integrating desirable agronomic and farmer-preferred traits.

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珍珠小米（Pennisetum glaucum[L.]R.Br.）对条纹夜蛾抗性的世代平均分析

摘要Striga hermonthica[Del.]Benth。（Sh）是一种有毒的寄生杂草，导致撒哈拉以南非洲珍珠小米的产量大幅下降。本研究的目的是确定新开发的珍珠小米群体中抗Sh的基因作用和遗传，以指导选择和遗传进展。通过对Striga侵扰的对比反应，从成对的珍珠小米系中获得双亲本杂交。两组亲本系，F1s、F2s和回交，使用三个重复的随机完全区组设计进行评估。收集在种植后60天和80天计数的Striga数量的数据。方差分析显示，Sh参数在各代之间存在显著差异（P<0.001）。重复基因作用控制了Sh出现数量的遗传。从这两组中选择具有抗Sh抗性的独特F2个体，通过综合理想的农艺性状和农民偏好的性状，采用循环选择方法进行珍珠小米品种的遗传改良。

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来源期刊

Journal of Crop Improvement Multiple-

CiteScore

3.30

自引率

7.70%

发文量

期刊介绍： Journal of Crop Science and Biotechnology (JCSB) is a peer-reviewed international journal published four times a year. JCSB publishes novel and advanced original research articles on topics related to the production science of field crops and resource plants, including cropping systems, sustainable agriculture, environmental change, post-harvest management, biodiversity, crop improvement, and recent advances in physiology and molecular biology. Also covered are related subjects in a wide range of sciences such as the ecological and physiological aspects of crop production and genetic, breeding, and biotechnological approaches for crop improvement.