筛选热带和亚热带玉米种质，以确定其对 Striga hermonthica 和 S. asiatica 的抗性以及与产量相关的性状

IF 1.6 3区农林科学 Q2 AGRONOMY

Euphytica Pub Date : 2024-03-15 DOI:10.1007/s10681-024-03309-2

Emeline N. Dossa, Hussein Shimelis, Admire I. T. Shayanowako, Mark D. Laing

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引用次数: 0

摘要

鉴定对Striga hermonthica（Sh）和S. asiatica（Sa）具有双重抗性的玉米种质可以培育出具有稳定抗性的栽培品种。在受控环境下，采用 13 × 10 α-网格设计，两季两次重复，对 130 个热带和亚热带玉米种质（包括对照）对 Sh 和 Sa 侵染的反应进行了评估。在浒苔和莎草侵染的处理中，被评估基因型的所有记录性状均存在显著差异（P < 0.05）。在沙害条件下，种植 8 周后（SEC8）和 10 周后（SEC10）的平均 Striga 出现计数分别为 5.00 和 45.50，而种植 8 周后（SDR8）和 10 周后（SDR10）的平均 Striga 危害率分别为 3.35 和 3.07。在浒苔肆虐的条件下，SEC8 和 SEC10 的平均值分别为 3.66 和 3.77，而 SDR8 和 SDR10 的值分别为 5.25 和 2.75。在沙尘暴条件下，花期-抽穗期（ASI）与 SDR8（r = 0.18）和 SDR10（0.32）之间存在显著的正相关（P < 0.05）。每株穗数（EPP）与 SEC8、SDR8 和 SDR10 之间呈显著负相关，分别为 r = - 0.18、r = - 0.27 和 r = - 0.24。在浒苔侵染条件下，SDR8 与 EPP（r = - 0. 20）、EHT 与 SEC8（r = - 0.22）、EHT 与 SDR8（r = - 0.36）、PLHT 与 SDR8（- 0.48）以及 PLHT 与 SDR10（- 0.22）之间存在显著负相关。结果表明，一些热带和亚热带玉米品系对两种 Striga 具有双重抗性。以下基因型对 Sa 和 Sh 具有双重抗性：CML440、CML566、CML540、CML539、CLHP0343、CLHP0326、TZISTR1248、TZSTRI115、TZISTR25、TZISTR1205、TZSTRI113、TZISTR1119、TZISTR1174 和 OPV B. King/1421、Shesha/1421。King/1421、Shesha/1421、ZM1421、DTSTR-W SYN13、DTSTR-Y SYN14 和 2*TZECOMP3DT/WhiteDTSTRSYN）C2。所鉴定的基因型适合作为亲本，用于培育具有抗Striga能力和提高谷物产量的高性能玉米品种。

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Screening tropical and sub-tropical maize germplasm for resistance to Striga hermonthica and S. asiatica and yield-related traits

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Screening tropical and sub-tropical maize germplasm for resistance to Striga hermonthica and S. asiatica and yield-related traits

Identification of maize germplasm with dual resistance to Striga hermonthica (Sh) and S. asiatica (Sa), could lead to the development of cultivars with stable resistance. 130 tropical and sub-tropical maize germplasms, including checks, were evaluated in a controlled environment for their reaction to Sh and Sa infestations using a 13 × 10 alpha lattice design with two replications over two seasons. Significant differences (P < 0.05) were detected among the assessed genotypes for all the recorded traits in Sh and Sa-infested treatments. Under Sa-infested conditions, mean Striga emergence counts 8 weeks after planting (SEC8) and 10 weeks after planting (SEC10) were 5.00 and 45.50, respectively, while the mean Striga damage rate 8 weeks after planting (SDR8) and 10 weeks after planting (SDR10) were 3.35 and 3.07, respectively. Under Sh-infested conditions, SEC8 and SEC10 mean values were 3.66 and 3.77, respectively, while the SDR8 and SDR10 values were 5.25 and 2.75 respectively. Positive and significant (P < 0.05) correlations were found between anthesis-silking interval (ASI) and SDR8 (r = 0.18) and SDR10 (0.32) under Sa-infested conditions. Negative and significant correlations were recorded between ear per plant (EPP) and SEC8, SDR8, and SDR10, with r = − 0.18, r = − 0.27, and r = − 0.24, respectively. Under Sh-infested conditions, significant and negative correlations were recorded between SDR8 and EPP (r = − 0. 20), EHT and SEC8 (r = − 0.22), EHT and SDR8 (r = − 0.36), PLHT and SDR8 (− 0.48), and PLHT and SDR10 (− 0.22). The results suggest that dual resistance to the two Striga species exists in some tropical and sub-tropical maize lines. The following genotypes have dual resistance to Sa and Sh: CML440, CML566, CML540, CML539, CLHP0343, CLHP0326, TZISTR1248, TZSTRI115, TZISTR25, TZISTR1205, TZSTRI113, TZISTR1119, TZISTR1174 and the OPVs B.King/1421, Shesha/1421, ZM1421, DTSTR-W SYN13, DTSTR-Y SYN14, and 2*TZECOMP3DT/WhiteDTSTRSYN) C2. The identified genotypes are suitable for use as parents in developing high-performing maize varieties with Striga resistance and improved grain yield.

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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.