TRIALLEL ANALYSIS FOR YIELD AND ITS ANCILLARY CHARACTERS IN OKRA [Abelmoschus esculentus (L.) Moench]
KrishiKosh
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Title |
TRIALLEL ANALYSIS FOR YIELD AND ITS ANCILLARY CHARACTERS IN OKRA [Abelmoschus esculentus (L.) Moench]
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Creator |
GOHIL, VANRAJ N.
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Contributor |
VASHI, P.S.
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Subject |
crossing over, planting, fruits, yields, additives, developmental stages, heterosis, vegetables, biological phenomena, genetics
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Description |
Triallel analysis was performed using six genetically diverse genotypes and one improved variety of okra. The trial was conducted in a set of 112 entries including seven parental lines at College Farm, N.M. College of Agriculture, Navsari Agricultural University, Navsari during summer, 2005. The characters studied were days to first fruit set, plant height, branches per plant, fruit length, fruit girth, fruits per plant, yield per plant and incidence of yellow vain mosaic. The data were analysis as per the model suggested by Ponnuswamy (1972). The triallel cross analysis of variances indicated the presence of additive and non-additive gene action in make up of all the traits because all the line effects except two line specific effect of second kind for plant height were significant. Some of the genotypes were found to be good as both grand parents and immediate parents. They were JO(2000-S)-3 for days to first fruit set and fruit length; JO (2K-5) for yield per plant and fruit length; JO(2000-S)-12 for fruit girth; JO (2K-1) for branches per plant and JO(2000-S)-18 for incidence of yellow vein mosaic. Considering the three line specific effects of all the traits, crosses (JO (2K-5) x JO (2K)-10)JO(2000-S)-12, (JO (2K-1) x Parbhani Kranti)JO(2000-S)-3 and (JO(2000-S)-12 x Parbhani Kranti)JO (2K)-10 were found to be important from the unified action point of view for yield and its ancillary characters. In some of the crosses reciprocal effects were found to be significant which indicated that the performance of triplet was influenced by order of parents appeared in a specific cross therefore, while planning the crossing programme, order of parents should be taken in to consideration. Among components of gene action dominance x dominance was predominant for all the characters except days to first fruit set where additive x dominance was higher. Wherever additive component was parents it was minor in magnitude and dominance component was negative for all the traits. The predominant dominance x dominance component can be exploited through hybrids derivative programme, for improvement in yield and it ancillary characters in okra. Hybridization involving identified better parents for respective traits followed by selection may be practiced for further improvement of the traits where additive component was involved in the expression of the characters. |
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Date |
2016-03-08T09:18:06Z
2016-03-08T09:18:06Z 2007-06 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/64895
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Language |
en
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Format |
application/pdf
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Publisher |
Navsari Agricultural University, Navsari
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