Association of recombinant Chilli leaf curl virus with enation leaf curl disease of tomato: a new host for chilli begomovirus in India

Chilli leaf curl virus (ChiLCV) is a serious problem for chilli production in Pakistan and India. In this study, fourteen different chilli lines / varieties were screened for their resistance/susceptibility towards ChiLCV in open field trials. Data of disease severity and disease incidence was recorded on weekly basis. Out of all varieties screened, Tatapuri Chilli and CH111 showed high susceptibility towards the chilli leaf curl disease. Talhari, CH 99, CH103, CH 106, CH107, CH108, CH109, GSL111 showed susceptible response whereas CBS1292 showed moderately susceptible response towards the disease. Only two cultivars Hybrid-46 and Hot Queen were found as moderately resistant. The screening experiment showed that most of the chilli varieties are susceptible to chilli leaf curl disease and resistance is lacking in local germplasm. Furthermore, three insecticides: Imidacloprid, Polo and Emamectin were tested for their efficacy for the management of disease and whitefly vector in field conditions at weekly intervals. Out of three insecticides, Polo gave best results as compared to Emamectin and Imidacloprid against chilli leaf curl disease and whitefly vector.

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Genetic analysis for resistance to leaf curl disease in Chilli Peppers (Capsicum annuum L.) under specific situations

Indian Journal of Genetics and Plant Breeding (The) ◽

10.31742/ijgpb.79.4.13 ◽

2020 ◽

Vol 79 (04) ◽

Author(s):

Pradeep Kumar Maurya ◽

Arpita Srivatstava ◽

Manisha Mangal ◽

Akshay Talukdar ◽

Bikash Mondal ◽

...

Keyword(s):

Recessive Gene ◽

Viral Disease ◽

Specific Marker ◽

Chi Square ◽

Resistant Genotype ◽

Chi Square Test ◽

Leaf Curl Virus ◽

Chilli Leaf Curl Virus ◽

Leaf Curl Disease ◽

Leaf Curl

Leaf curl is a serious viral disease of chilli caused by a group of bigomoviruses dominated by chilli leaf curl virus (ChiLcv). With the aim to study the mode of inheritance of the ChiLcv disease resistance, a resistant genotype DLS-Sel.10 was crossed with a susceptible genotype Phule Mukta and F1, F2, B1 and B2 generations were developed. The parents along with the segregating generations were screened under natural conditions as well as challenged inoculation with viruliferous whiteflies carrying predominant ChiLcv.PCR amplification of viral genome-specific marker confirmed the presence of virus in all the tested plants however, only susceptible plants produced symptoms. The F1 plants showed susceptibility under both natural and challenged inoculation conditions indicating that the resistance is of recessive nature. On Chi-square test, it was found that susceptible and resistant plants of the two F2populations segregated in a ratio of 3 susceptible : 1 resistant plants and the B2 population derived from DLS-Sel.10/Phule Mukta//DLS-Sel.10 segregated in a ratio of 1 resistant : 1 susceptible plant suggesting that the Chilcv is goverened by a single recessive gene. The findings of this study will help in breeding for ChiLcv resistance in Chilli.

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