The resistance to banded leaf and sheath blight in maize of 282 inbred lines

Abstract

Rhizoctonia solani causal agent of banded leaf and sheath blight (BLSB), is widely distributed in the South China and Southeast Asian in maize causing severe yield losses. In this study, we identified the disease resistance of 282 maize inbred lines to BLSB. The results showed that no immune and highly resistant germplasm was found and four moderately resistant inbred lines were identified. These four moderately resistant inbreds had good performance in grain yield, combining ability and a suitable growth period; they could be good donor of disease resistance gene to improve the other maize lines. The environments, R. solani isolate and the evaluation method were main factors that affect the evaluate results. In order to evaluate the disease resistance of maize lines to BLSB, environments beneficial to the disease, R. solani isolate have stronger pathogenic force, artificial infection and proper disease nurseries were necessary. The analysis on the disease resistant inbred lines from different heterosis groups showed that lack of resistance germplasm in SS array was more serious and it was more effective to seek resistance germplasm from the NSS array, especially from the PB and tropical maize germplasm.

Genetic diversity and resistance assessment among maize genotypes against banded leaf and sheath blight (caused by Rhizoctonia solani f. sp. sasakii) utilizing SSR markers

“…Later, Bhavana and Gadag (2009) reported 27% and 13% resistant maize lines against BLSB under artificial conditions at Pantnagar and Udaipur, respectively. Similar differential responses of maize genotypes against BLSB have been recorded by various researchers under different climatic conditions: Asif & Mall (2017), Chen and Zhang (2013), Devi et al (2015), Izhar and Chakraborty (2013), Yadav, Sharma, et al (2022), Yadav, Kumar, et al (2022). Similarly, Lal (2013) observed 19 inbred lines and 14 hybrids as resistant to BLSB at Haryana, India, under artificial inoculation conditions.…”

Genetic dissection of maize disease resistance and its applications in molecular breeding

“…Banded leaf and sheath blight (BLSB) (Fig. 1f ) is a widespread soil-borne fungal disease of both maize and rice in South and Southeast Asia (Zhao et al 2006 ; Chen et al 2013 ; Li et al 2019 ). The F-box gene ZmFBL41 was identified as a causal gene conferring quantitative resistance to BLSB (Li et al 2019 ).…”