สืบค้นงานวิจัย
GENETIC IMPROVEMENT OF HEVEA BRASILIENSIS IN INDIA
Y. Annamma Varghese - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): GENETIC IMPROVEMENT OF HEVEA BRASILIENSIS IN INDIA
ผู้แต่ง / หัวหน้าโครงการ (EN): Y. Annamma Varghese
บทคัดย่อ (EN): Genetic improvement programme has paid rich dividends in increasing yield by several fold from a low productivity of around 300 kg ha-1 yr-1 for ordinary seeds to around 3000 kg ha-1 yr-1 for recent hybrid clones. In India so far, 127 Wickham clones evolved in countries like Malaysia, Sri Lanka, Thailand, China and Ivory Coast constitute the exotic component of the gene pool. Utilizing this genetic base substantial improvement in productivity has been achieved over the years. The high productivity now achieved by India can be attributed to the high yielding hybrid clones of which the most popular clone is RRII 105 with a production potential of over 2000 kg/ha/year in farmers plots. Over 100 potential clones evolved by hybridization, ortet section and polycross breeding are under various stages of vealuation. The current series of hybrid clones developed by the RRII viz. RRII 400 series is another remarkable achievement. Five of these clone viz. RRII 414, RRII 417, RRII 422, RRII 429 and RRII 430 with an experimental yield of more than 20 per cent improvement in yield and growth over the high yielding clone RRII 105 have been included in the planting recommendation of the Rubber Board. Out of a total of 46 clones included in three categories in the current planting recommendation, 15 are India clones, while the remaining 31 are of exotic origin from Malaysia, Indonesia, Sri Lanka, China, Thailand and Ivory Coast. Recognizing the potential danger of monoculture of one or a few high yielding clones in a geographical area, a strategy for encouraging multiclone planting has been recommended by the Rubber Board of India. Concerted efforts in selecting location specific clones for non-traditional rubber growing areas under sub optimal conditions have resulted in identification of clones for different non-traditional areas. Based on the performance of clones in the regional research stations in the North Eastern states, an ad hoc recommendation of clones has been made. Realizing the need for broadening the original narrow genetic base, steps were taken for introduction of wild Germplasm in to the India breeding pool. Currently, a total of 4548 accessions including 90 ortet clones received from the Malaysian center, have been established for conservation and characterization, evaluation and utilization done in a phased manner. Attempts towards establishment of a core collection from the large collection of wild Germplasm has been initiated and established the first core set of 27 from a set of 81 wild accessions. In the context of rubber cultivation having been extended to nontraditional and marginal areas, screening wild accessions for resistance to major diseases, drought and cold conditions is in progress and certain potential accessions were selected for incorporation in to the breeding pool. Selections with relatively high yield potential in preliminary screening have been subjected to field evaluation. Hybrid progenies from selected parent clones of Wickham and wild Germplasm are also under field evaluation. Molecular studies in Hevea indicated the potential of DNA based markers for various applications in genetic improvement like assay of genetic diversity and genetic analysis. The significance of crop improvement programmers to meet the current objectives and future demand of the industry are discussed.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): wild germplasm
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

การอ้างอิง

Y. Annamma Varghese. "GENETIC IMPROVEMENT OF HEVEA BRASILIENSIS IN INDIA". ไม่ระบุหน่วยงาน. ม.ป.ป.

Y. Annamma Varghese. "GENETIC IMPROVEMENT OF HEVEA BRASILIENSIS IN INDIA". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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GENETIC IMPROVEMENT OF HEVEA BRASILIENSIS IN INDIA
Y. Annamma Varghese
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
Cloning and expression of HbACO2 of Hevea brasiliensis Plant Hormones and Oxidative Stress in Hevea brasiliensis Localization of Peroxidase Enzyme in the Bark of Hevea brasiliensis Some Considerations Concerning the Yield Potential of Some Clones (Hevea brasiliensis) Effect of Temperature Constraints on Photosynthesis of Rubber (Hevea brasiliensis) Rapid Molecular Identification and Detection of Corynespora cassiicola of Hevea brasiliensis ผลของโอโซนต่อการสังเคราะห์ด้วยแสงของยางพารา Hevea brasiliensis Muell.Arg Identification of Resistance of Hevea brasiliensis Clones to Corynespora Leaf Fall Disease Rubber Particles Proteins and Sensitivity to the Tapping Panel Dryness at Hevea brasiliensis Association of a Viroid with Tapping Panel Dryness of Hevea brasiliensis and its Molecular Characterization
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