Screening of Parents and Hybrids Resistant to Late Blight and Leaf Curl Virus Diseases in Tomato

Radhe Shyam Kherwa

Department of Horticulture (Vegetable & Floriculture), Bihar Agricultural University, Sabour, Bhagalpur– 813 210, Bihar, India.

S. S. Solankey *

Department of Horticulture (Vegetable & Floriculture), Bihar Agricultural University, Sabour, Bhagalpur– 813 210, Bihar, India.

Shirin Akhtar

Department of Horticulture (Vegetable & Floriculture), Bihar Agricultural University, Sabour, Bhagalpur– 813 210, Bihar, India.

Mahendra Kumar

Department of Horticulture, HNBGU, A Central University, Uttarakhand - 246174, India.

*Author to whom correspondence should be addressed.


Abstract

The experimental material included 21 F1 hybrids (developed by half diallel fashion), 7 parents and standard check were all planted in randomized complete block design with three replications at Bihar Agriculture University, Sabour. Among the parents Pusa Rohini, Arka Vikash and S. pimpinellifolium whereas, among the crosses, Pusa Rohini × Arka Vikash, H-86 × Arka Vikash and Arka Vikash × S. pimpinellifolium were showed  highly resistant for per cent disease incidence and coefficient of infection of late blight and ToLCV. Maximum heterosis over better parent and standard parent in desirable direction were found in Pusa Rohini × Arka Vikash (-48.61, -52.84), (-72.12, -76.42) and Arka Vikash × Arka Abha (-42.02, -50.35), (-61.35, -75.17) for per cent disease incidence and coefficient of infection of late blight. Whereas heterosis for PDI and CI of ToLCV was found in cross combinations namely, Pusa Rohini × S. pimpinellifolium (-46.35, -65.08), (-77.50, -88.35) and Arka Vikash × S. pimpinellifolium (-60.85, -64.32) (-86.95, -88.27) over better parent and standard parent. The cross identified as best specific combiners Arka Vikash × S. pimpinellifolium for per cent disease incidence and coefficient of infection of late blight and ToLCV. Among the parents for late blight the per cent disease incidence and coefficient of infection were significantly shown by Arka Vikash and Arka Abha. Against ToLCV (PDI and CI) resistance, parents Pusa Rohini, S. pimpinellifolium and Arka Vikash were exhibited significantly negative GCA effect.

Keywords: Heterosis, combining ability, late blight, ToLCV, resistance


How to Cite

Kherwa, Radhe Shyam, S. S. Solankey, Shirin Akhtar, and Mahendra Kumar. 2023. “Screening of Parents and Hybrids Resistant to Late Blight and Leaf Curl Virus Diseases in Tomato”. International Journal of Environment and Climate Change 13 (2):158-65. https://doi.org/10.9734/ijecc/2023/v13i21670.

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