Variability And Hetrosis In Bush Type Vegetable Cowpea (Vigna Unguiculata(L) Walp.) (Record no. 25625)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03622nam a2200181Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20220817175904.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 151218b xxu||||| |||| 00| 0 eng d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 635.6 |
| Item number | SOB/VA |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Sobha PP |
| 245 ## - TITLE STATEMENT | |
| Title | Variability And Hetrosis In Bush Type Vegetable Cowpea (Vigna Unguiculata(L) Walp.) |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc. | Vellanikkara |
| Name of publisher, distributor, etc. | Department of Olericulture, College of Horticulture |
| Date of publication, distribution, etc. | 1994 |
| 502 ## - DISSERTATION NOTE | |
| Degree type | MSc |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | The present investigation on ‘variability and hetrosis in bush type vegetable cowpea (Vignaunguiculata (L.) walp.)’ was conducted at the College of Horticulture, Vellanikkara, Thrissur during 1992 - 94. Thirty one genotypes of cowpea collected from different parts of the country were grown in a randomised block design with three replications to assess the extent of genetic variability for fifteen characters viz. plant height, spread, primary branches, days to flowering, days to harvest, pod length, pod girth, pod weight, seeds/pod, flower bunches, pods/cluster, pods/kg, 100 seed weight, pods/plant, and yield/plant. The genotypic and phenotypic coefficients of variation, heritability, genetic advance and genetic gain were estimated. Based on D2 analysis and morphological observations, ten parents were selected and crossed in all possible combinations in a 10 x 10 diallel to produce 45 F1 hybrids. These F1 hybrids were evaluated along with their parents to derive information on general and specific combining ability effects and heterosis. Significant differences were observed among the 31 genotypes for all the fifteen characters studied. The highest genotypic coefficient of variation was observed for pods/kg, pod weight and yield. High heritability coupled with high genetic gain was observed for these traits. Days to harvest, pod length, pod girth, pod weight and yield. High heritability coupled with high genetic gain was observed for these traits. Days to harvest, pod length, pod girth, pod weight, pods/kg, seeds/pod and 100 seed weight were highly correlated with yield. Pod weight exerted the maximum direct effect on yield. Based on genetic divergence the 31 genotypes were grouped into six clusters. Polyacrylamide gel electrophoresis of cowpea seed proteins showed marked variation in banding pattern. Different cowpea varieties could be distinguished by the species specific bands. Significant gca and sca variances were observed for all the traits. Amb – 1, selection 263 and selection 2 - 1 were the best general combiners for earliness. Hybrids resulted from Amb – 1 x ArkaGarima and Vu – 18 x Amb – 1 recorded high sca effects for earliness. ArkaGarima and selection 2 – were the best general combiners for yield. The hybrids Vu 18 x ArkaGarima and Selection 2 – 1 x Vs 389 evinced high sca effects for yield. Significant heterosis were observed for all the traits in many hybrids. Several hybrids recorded significant negative relative heterosis, heterobeltiosis and standard heterosis for earliness. Amb – 1 x ArkaGarima and Vu – 18 x Amb – 1 were significantly early to flower compared to standard variety, ArkaGarima. Relative heterosis and heterobeltiosis were observed in many hybrids for yield/plant. Selection 2–1 x VS 389 and Vu – 18 x Amb – 1 showed high relative heterosis as well as heterobeltiosis. Vu – 18 x ArkaGarima and Selection 2 – 1 x VS 389 were the promising hybrids which exceeded the standard variety ArkaGarima for yield/plant. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Abdul Wahab M (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://krishikosh.egranth.ac.in/handle/1/5810084671 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Koha item type | Theses |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Permanent Location | Current Location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
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| KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2014-03-18 | 635.6 SOB/VA | 170670 | 2014-03-18 | 2014-03-18 | Theses |