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Birsa Agricultural University, Ranchi

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1993 - 19952
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Author: Rajesh Kumar × End date: 1997 × Start date: 1993 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Studies on The Effect of Defoliation And Bud Wood Storage On Method Grafting In Mango (Mangifera Indica Linn.) Cv. Dashehari
    (Birsa Agricultural University, Ranchi, 1993) Rajesh Kumar; C. Singh
    The Mango because of its great utility occupies a prominent place amongst the fruits crops of India and is acknowledged as the national fruit of our country. Bihar ranks next to U.P in area and production of mango, Since mango is a cross pollinated crop, vegetative propagations of paramount importance for this crop. Although inarching is still the chief technique of propagation in Bihar, but due to several disadvantages of this method, now-a- days the detached methods such as veneer, soft wood and stome grafting are being strongly advocated. The information available on the comparative performance of these detached methods at the nursery stage and also on the establishment in the nursery under agro-climatic conditions of chota Nagpur region and lacking. Very little work has been done to standardize the period of defoliation and storage of bud wood for this region. With a view to evaluate the different techniques of detached methods of grafting for Dashehari mango and to find the best defoliation and storage period, the present study was undertaken at Ranchi Agril. College kanke, during the monsoon season of 1991 and repeated in 1992. For this study three different sets of trials were conducted with action shoot of Dashehari mango under randomized block design. There were altogether 9 treatments in each set and were replicated thrice. There were 3 defoliation periods (6, 8, and 10 days) 3 storage period(0, 3 and 6 Days).
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    ThesisItemOpen Access
    Genetic Diversity And Diallel Analysis Studies In Brinjal (solanum melongena L.)
    (Birsa Agricultural University, Ranchi, 1995) Rajesh Kumar; S.S.P.Verma
    The present investigation entitled Genetic diversity and diallel analysis studies in brinjal (Solanue L.) comprised of two sets of experiment, first relating to variability and genetic diversity with 40 diverse cultivars of brinjal and the second one was 6 x 6 complete diallel cross analysis for heterosis, combining ability and gene action studies. The analysis of variance revealed highly significant differences among the cultivars for all the 18 plant characters. The cultivar Aushay recorded the highest fruit yield per plant (1719.50 g) as well as estimated yeild (412.50 g/ha) and was found significantly superior to the check variety IMK. The other high yielding cultivars were AC.1 (393.75 q/ha) and PBR-91-1 (280.83 q/ha). The plant mortality due to wilt and fruit borer infestation was also found minimum in cultivars Aushay and AC.1. The phenotypic coefficient of variation (PCV) was slightly higher in magnitude than the genotypic coefficient of variation (GCV) for all the characters. PCV and GCV were found high for fruit weight, yield per plant and fruit width.