Combining ability and hybrid breeding in pearl millet (Pennisetum glaucum [L.] R. Br.) for agronomic traits and resistance to Striga hermonthica

IF 1.6 3区农林科学 Q2 AGRONOMY Euphytica Pub Date : 2024-03-27 DOI:10.1007/s10681-024-03320-7

Armel Rouamba, Hussein Shimelis, Inoussa Drabo, Emmanuel Mrema, Jacob Mashilo, Learnmore Mwadzingeni

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Abstract

Pearl millet (Pennisetum glaucum [L.] R. Br., 2n = 2x = 14) is a nutrient-dense and climate-resilient crop widely cultivated in the dry regions of Africa and Asia. In Burkina Faso, the actual mean yield of the crop is < 1 ton/ha compared with a potential yield of 3 tons/ha. Several constraints, including cultivar susceptibility to the noxious weed Striga hermonthica (Del.) Bentham (Sh) and severe and recurrent drought stress limit the potential productivity of the crop. Therefore, this study aimed to determine the combining ability effects and degree of heterosis for agronomic traits and resistance to Sh among complementary pearl millet genotypes to select promising parental lines and hybrids to develop and deploy farmer-preferred varieties. The narrow-and broad-sense heritability were relatively higher for Striga-resistance (≥ 70%) and low (≤ 23%) for grain yield. The general combining ability and specific combining ability ratios were less than unity for agronomic traits and Striga reaction indicating the predominance of non-additive gene action conditioning the assessed traits. The new experimental hybrids such as IP-11358 × ICMB177111, IP-11358 × IKMB18002, IP-10579 × ICMB177002 and IP-9242 × ICMB177002 are recommended for multi-environment evaluation and production in Sh-infested pearl millet cultivation agro-ecologies in Burkina Faso or similar agro-ecologies.

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珍珠粟（Pennisetum glaucum [L.] R. Br.）农艺性状和抗Striga hermonthica的组合能力与杂交育种

珍珠粟（Pennisetum glaucum [L.] R. Br.，2n = 2x = 14）是一种营养丰富、气候适应性强的作物，广泛种植于非洲和亚洲的干旱地区。在布基纳法索，该作物的实际平均产量为 1 吨/公顷，而潜在产量为 3 吨/公顷。一些制约因素，包括栽培品种对有害杂草 Striga hermonthica (Del.) Bentham (Sh) 的易感性以及严重和反复的干旱胁迫，限制了该作物的潜在产量。因此，本研究旨在确定互补珍珠粟基因型在农艺性状和抗性方面的组合能力效应和异质性程度，以筛选出有前景的亲本品系和杂交种，开发和应用农民喜爱的品种。抗Sh的狭义和广义遗传力相对较高（≥ 70%），而谷粒产量的狭义和广义遗传力较低（≤ 23%）。农艺性状和抗Striga反应的一般结合能力比和特殊结合能力比均小于1，表明非加性基因作用在所评估的性状中占主导地位。建议对 IP-11358 × ICMB177111、IP-11358 × IKMB18002、IP-10579 × ICMB177002 和 IP-9242 × ICMB177002 等新的试验杂交种进行多环境评价，并在布基纳法索或类似的农业生态环境中进行珍珠粟种植生产。

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来源期刊

Euphytica 农林科学-农艺学

CiteScore

3.80

自引率

5.30%

发文量

157

审稿时长

4.5 months

期刊介绍： Euphytica is an international journal on theoretical and applied aspects of plant breeding. It publishes critical reviews and papers on the results of original research related to plant breeding. The integration of modern and traditional plant breeding is a growing field of research using transgenic crop plants and/or marker assisted breeding in combination with traditional breeding tools. The content should cover the interests of researchers directly or indirectly involved in plant breeding, at universities, breeding institutes, seed industries, plant biotech companies and industries using plant raw materials, and promote stability, adaptability and sustainability in agriculture and agro-industries.