Fast track evaluation and selection of Hevea brasiliensis clones from a clonal nursery (Record no. 59298)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02539nam a2200217Ia 4500 |
| 100 ## - MAIN ENTRY--AUTHOR NAME | |
| Personal name | Gireesh T |
| 245 #0 - TITLE STATEMENT | |
| Title | Fast track evaluation and selection of Hevea brasiliensis clones from a clonal nursery |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Name of publisher | Industrial Crops and Products |
| Year of publication | 2017 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Number of Pages | 195-201 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Ten female parents of natural rubber (Hevea brasiliensis), introduced from two Southeast Asian countries were allowed to natural cross breeding. After a primary culling of seedlings based on growth and test tap yield in juvenile stage, 20 half-sib (HS) progenies were clones and evaluated in a clonal nursery trial (CNT) laid our (RCBD, plot size 6 with replication) in a close spacing of 2.5 m x 2.5 m. Four established precocious high yielding clones (RRII 430, RRII 424, RRII 105 and PB 235) were included as control. Superior clones were identified based on the important agronomic traits viz., growth, juvenile yield, tolerance to pink disease and bark thickness within a short span of five years, instead of fifteen years in conventional small scale trials (SST) with a wide spacing (4.9m x 4.9m). The results indicated that one of the half-sib progeny of mother clone PB 86 (HS PB 86/57) registered significantly (p<0.05) superior dry rubber yield of 18 g per tree per tapping (g/t/t), and vigorous trunk girth (43 cm) at breast height in the 5th year after planting when compared to that of RRII 105 (11.9 g/t/t; 34.1 cm girth) and on par with RRII 430 (14.9 g/t/t; 31 cm girth) and RRII 414 (14 g/t/t; 38 cm girth), the best among the checks. The second best clone HS LCB 1320/30 also recorded comparable yield and growth with RRII 430 and was better than RRII 414. Three clones (HS PB 86/57, HS BD 5/27 and HS LCB 1320/30) could be selected based on the growth, yield and other secondary traits. None of the trees of HS PB 86/57 showed incidence of pink disease and Tapping Panel Dryness (TPD) during field evaluation which deserves attention. The results support superior performance of new genotypes in CNT, saving time and space required to complete the breeding-evaluation cycle. Besides, these clones could be used as improved genetic stocks for initiating new breeding programmes to enrich the genetic base of natural rubber. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Early evaluation |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Half-sibs |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Hevea brasiliensis |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Rubber yield |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Sortening breeding cycle |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Meenakumari T |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Mydin K.K |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | Online copy |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Journals |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Serial Enumeration / chronology | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Journals | RRII Library | RRII Library | Botany | 17/12/2021 | Volume 103, Issue Sept | Journals |