Identification and characterisation of nutmeg (Myristica fragrans Houtt.) genotypes of southern Kerala (Record no. 289363)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04861nam a22001817a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 633.8 |
| Item number | NAI/ID PG |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Nainu Joseph |
| 245 ## - TITLE STATEMENT | |
| Title | Identification and characterisation of nutmeg (Myristica fragrans Houtt.) genotypes of southern Kerala |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellayani |
| Name of publisher, distributor, etc | Department of Plantation Crops and Spices, College of Agriculture |
| Date of publication, distribution, etc | 2021 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 149p. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | M Sc |
| 520 ## - SUMMARY, ETC. | |
| Abstract | The research work on “Identification and characterisation of nutmeg (Myristica fragrans Houtt.) genotypes of Southern Kerala” was undertaken during 2020-21 at the Department of Plantation Crops and Spices, College of Agriculture, Vellayani. A survey was conducted in the nutmeg growing belts of Agro-Ecological Unit (AEU) 4 of Kottayam and Pathanamthitta districts, AEU 8 of Thiruvanathapuram district, AEU 9 of Kottayam, Pathanamthitta and Thiruvanathapuram districts, AEU 12 of Kottayam and Kollam districts and AEU 14 of Pathanamthitta district for identification of nutmeg genotypes with superior yield and variability. Among the fifty nutmeg genotypes surveyed twenty one genotypes were selected for characterization and in situ evaluation. The twenty one selected nutmeg genotypes from homesteads and estates were denoted as KDR 1, MNA 2, MNA 3, MNA 4, MPY 5, MPY 6, MPY 7, MPY 8, NLD 9, NLD 10, PND 11, PND 12, PKM 13, PLA 14, PLA 15, PLA 16, PLA 17, PRA 18, VNI 19, VNI 20 and VNI 21 based on the location of study. Qualitative and quantitative characterization of twenty one genotypes was undertaken for tree, leaf, flower, fruit and seed characters. Based on the DUS guidelines provided by PPV & FRA (2015) and minimal descriptor developed (Vikram, 2016) on nutmeg, thirty six qualitative characters were observed in the study in which height of tree, sex form, presence of caruncle and fruit length were non variable characters. The thirty two variable qualitative characters were subjected to hierarchical cluster analysis. UPGMA (Unweighted Pair Group Method with Arithmetical Averages) dendrogram was generated from the qualitative characters and fourteen clusters were formed at 65 percent similarity. Based on the clusters formed in the dendrogram, genotypes namely, MNA 3, NLD 9, NLD 10, PRA 18 and PLA 16 were closely related (cluster II), MPY 5 and PKM 13 (cluster III), PKD 11 and PLA 15 (cluster IV) and PLA 17 and VNI 20 (cluster VI). KDR 1 with yellow mace formed a separate cluster (Cluster I). The monoecious genotype VNI 21 was distinctly different from other clusters. Thirty two quantitative characters including biochemical characters were observed in the selected genotypes. Under the multivariate analysis for quantitative characters, principal component analysis was used as a statistical tool to interpret the parameters. The thirty two quantitative characters were reduced to eight principal component groups contributing a total variance of 84.518%. Based on the loadings in principal components 1 and 2, score plot and biplot was generated. The score plot grouped genotypes into 15 clusters in which genotypes with superior yield namely, PKD 11, PLA 14, NLD 9, PKM 13 and PRA 18 formed unique clusters. The pooled mean of yield characters revealed that five genotypes namely PKD 11, PLA 14, NLD 9, PKM 13 and PRA 18 were superior in yield. Significantly superior number of fruits per tree, fresh and dry mace yield and fresh nut yield per tree was observed in PKD 11 which was followed by PLA 14 with high yield in terms of number of fruits per tree, mace, nut and kernel yield. Significantly superior dry nut and kernel yield was obtained in NLD 9. PKM 13 and PRA 18 also recorded significantly high number of fruits per tree, dry mace, dry nut and dry kernel yield as compared to other genotypes. Thirty six qualitative characters were reduced to a minimal descriptor of eight characters namely, crown shape, shape of leaf blade, number of flowers per cluster, nature of fruit bearing, colour of mace (fresh), mace covering pattern, attachment of mace to nut and seed colour. Thirty two quantitative characters was reduced to a minimal data set of five characters such as number of flowers per cluster, height of tree, fruit weight, single kernel weight (dry) and fruit set percentage. Those genotypes with best combinations of these qualitative and quantitative characters can be selected for yield in nutmeg. Thus based on the identification, characterization and in situ evaluation for two years, PKD 11, PLA 14, NLD 9, PKM 13 and PRA 18 with superior yield and yellow maced genotype KDR 1 were selected for future crop improvement studies in nutmeg. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Plantation Crops and Spices |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Nutmeg |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Myristica fragrans Houtt. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Sreekala, G S (Guide) |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Item type | Theses |
| Not for loan | Collection code | Permanent location | Current location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2022-04-22 | 633.8 NAI/ID PG | 175303 | 2022-04-22 | Theses |