<div>Background: Urdbean leaf crinkle disease (ULCD) is one of the most devastating biotic stress factors which is responsible for drastic yield loss in urdbean [Vigna mungo (L.) Hepper]. The etiology of ULCD is still unknown and there are conflicting reports on its transmission through seed, insect vectors, grafting and infected sap.&nbsp;&nbsp; 
 
Methods: Per cent seed transmission of ULCD had been studied during kharif, rabi and summer during the year 2019-2020 under natural and insect proof conditions. The effect on yield and seed quality parameters due to ULCD infection was studied. Urdbean cultivar VBN 8 was used in the present study. 
 
Result: The per cent seed transmission of ULCD was recorded ranging from 52.88 to 71.64% under natural conditions. In the insect proof glasshouse condition, the seed transmission was 83.62%. All the yield and seed quality parameters were adversely affected upon ULCD infection. The reduction in yield was recorded as 64.36% over the uninfected healthy plants. In ULCD infected seeds, the germination was reduced (84%) as compared to healthy seeds (92%).</div>

​Urdbean Leaf Crinkle Disease- Assessment of Seed Transmissibility and Its Effect on Yield and Seed Quality in Urdbean [Vigna mungo (L.) Hepper]

Background: Urdbean leaf crinkle disease (ULCD) caused by urdbean leaf crinkle virus (ULCV) is one of the destructive viral diseases for black gram cultivation. Development of resistant cultivars along with higher yield is the most efficient and cheapest way to alleviate the prevalence of ULCD. But for which understanding of inheritance of complex quantitative traits along with ULCD resistance is essential. Proper understanding of genetic architecture of complex traits can be obtained by using six-parameter model of generation mean analysis.&nbsp; 
 
Methods: Four diverse parents (VBN 8, DKU 87, LBG 623 and LBG 787) together with their six F1s (obtained during rabi, 2021-22), six BC1s, six BC2s and six F2s (obtained during summer, 2022) were evaluated for yield components in kharif, 2022 and rabi, 2022-23 and for ULCD during rabi, 2022-23 and late rabi, 2022-23 at Agricultural College Farm, Bapatla, Andhra Pradesh for estimation of components of gene effects controlling various traits.&nbsp; 
 
Result: Additive-dominant model is inadequate for nine traits out of ten studied quantitative traits including ULCD except test weight. Dominant &times; Dominant [l] type of epistatic interaction, is predominant among the operating non-allelic interactions. Duplicate epistatic interaction in the inheritance is evident at least in few crosses for eight traits (Days to maturity, plant height, branches per plant, clusters per plant, pods per plant, pod length, seeds per pod and grain yield per plant).

Deciphering the Inter Allelic Interactions for Yield Components and Urdbean Leaf Crinkle Disease Resistance in Black Gram [Vigna mungo (L.) Hepper] using Generation Mean Analysis

​Urdbean Leaf Crinkle Disease- Assessment of Seed Transmissibility and Its Effect on Yield and Seed Quality in Urdbean [Vigna mungo (L.) Hepper]

Deciphering the Inter Allelic Interactions for Yield Components and Urdbean Leaf Crinkle Disease Resistance in Black Gram [Vigna mungo (L.) Hepper] using Generation Mean Analysis

Urdbean Leaf Crinkle Disease- Assessment of Seed Transmissibility and Its Effect on Yield and Seed Quality in Urdbean [Vigna mungo (L.) Hepper]