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GENETIC ARCHITECTURE OF YIELD AND ITS COMPONENT CHARACTERS IN BLACK GRAM DURING RABI (Vigna mungo L. Hepper)

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Title GENETIC ARCHITECTURE OF YIELD AND ITS COMPONENT CHARACTERS IN BLACK GRAM DURING RABI (Vigna mungo L. Hepper)
 
Creator Trivedi, Pratik B.
 
Contributor CHAUHAN, D. A.
 
Subject fruits, cytoplasm, planting, fertilizers, grain, biological phenomena, developmental stages, sugarbeet, meiosis, layering
 
Description The present investigation was carried out with a view to study the magnitude of heterosis, combining ability and gene action through half diallel analysis excluding reciprocals involving seven parents and their twenty one F1 in black gram for rabi condition. The experimental material was planted in randomized block design with three replications at Pulses Research Station, Navsari Agricultural University, Navsari during Rabi-2012-13.
The analysis of variance for all the characters revealed that parents were found to be highly significant for all the character studied except pod length and hybrids were highly significant for all the characters, indicating presence of considerable amount of genetic variability in the parental material tested. Parents vs. Hybrids comparison was found to be highly significant for all the characters studied except days to 50 per cent flowering, plant height, harvest index and protein content.
Among the Parents, T-9, RU-10-626 and RU-10-630 were recorded as the best performing parents for seed yield per plant and 3 traits.
High heterotic effects were observed for days to 50% flowering, Plant height, Number of branches per plant, Number of clusters per plant, Number of pods per plant, pod length, Number of seeds per pod, seed yield per plant and 100-seed weight. It was observed from the present study that heterotic response for seed yield per plant was mainly due to high heterotic response observed for number of branches per plant, number of clusters per plant, number of pods per plant, 100-seed weight and number of seeds per pod.
Combining ability analysis revealed that the mean squares due to general combining ability and specific combining ability were highly significant for almost all the characters indicating importance of both additive as well as non-additive gene effects involved in the expression of all the characters. However, the variances due to general combining ability were lower than specific combining ability for plant height, number of branches per plant, pods per plant, pod length, Number of seeds per pod, seed yield per plant, 100-seed weight, straw yield, harvest index and protein content, thus on the basis of ratio of 2gca and 2sca results pointing out the preponderance of non-additive gene effects for the characters studied.
The general combining ability effects revealed that T-9, RU-10-626 and RU-10-630 were the good, average and poor general combiners, respectively for seed yield per plant, whereas, for other yield contributing characters the best general combiner
was T-9. The crosses GU-1 x RU-10-621, GU-1 x T-9, RU-10-629 x T-9, RU-10-629 x RU-10-630 and RU-10-621 x RU-10-624 were found to be good in respect of sca effects for grain yield per plant and involved poor x average and poor x good, average x good, average x poor and average x poor. This might be due to effect of allels of combining parents. Out of these best specific cross combinations, majority of the crosses showed high per se performance along with higher heterotic effects and higher sca effects for seed yield per plant indicating more reliability of per se performance. The per se performance of parents were more or less related to their gca effects.
 
Date 2017-01-20T09:52:06Z
2017-01-20T09:52:06Z
2013-07
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/97236
 
Language en
 
Publisher GENETICS AND PLANT BREEDING DEPT., N.M. COLLEGE OF AGRICULTURE, NAVSARI AGRICULTURAL UNIVERSITY, NAVSARI