สืบค้นงานวิจัย
Study on Performance of Clones in SSCT Derived from Hybridization among 1981 Hevea Germplasm and Oriental Clones
Nurmi-Rohayu A.H. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Study on Performance of Clones in SSCT Derived from Hybridization among 1981 Hevea Germplasm and Oriental Clones
ผู้แต่ง / หัวหน้าโครงการ (EN): Nurmi-Rohayu A.H.
บทคัดย่อ (EN): Over the past fifty years of rubber breeding programme. the small population introduced by Wickham was successfully increased in yield production. However, yield increases will not be expected with existing Wickham germplasm due to inbreeding depression, unless there is a new introduction of variability. In order to overcome the narrow genetic base of Hevea population in Malaysia, several attempts has been carried out to broaden the genetic base such as an introductions of new genetic materials. More than 10,000 genotypes of the 1981 Hevea germplasm were evaluated and some of the promising genotypes were incorporated in the breeding programme by crossing with high yielding oriental clones. The objective of this paper is to evaluate the growth performance and latex production clones for selection of improved materials. A total of forty three progenies derived from 13 crosses between 1981 Hevea germplasm and oriental clones of the 1990 hand pollination programme were evaluated in Small Scale clone Trial. The experimental design was 10 × 10 simple lattices with two replications This trial was carried out with planting distance of 30’ × 9’. The girth measurement of each progenies was carried out from the age of two years after planting and repeated annually. The progenies were opened foe tapping at the seven years after planting with 50% of the plants reaches tappabily size when the girth is at least 45 cm using the half spiral tapping cut and tapped third daily tapping system. The bark thickness measurement was carried out after three years of tapping period. Latex production for three years of tapping period of the progenies tested ranges from the highest 74.43 g/t/t (F5/21) to 5.30 g/t/t (N30/14). Twelve progenies showed mean yield better than PB 260. However, only four genotypes; F2/51 (74.43 g/t/t), K42/14 (73.93 g /t/t), 112/21 (68.50 g /t/t) and O27/11 (64.98 g/t/t) showed significantly higher mean yield than PB 260 (44.28 g/t/t) based on least significant difference test. Results for girth performance showed that J14/22 had the highest mean girth of 65.0 cm and 74.6 cm after five and seven years after planting respectively while J16/15 had the lowest mean girth of 36.1 cm and 43.5 cm after five and seven years of planting respectively. After five years of planting, thirty eight progenies were found to have mean girth measurement more than 45 cm. Eight progenies showed significantly higher mean girth measurement than PB 260 when the results were subjected to least significant different test for mean comparison i.e. J14/22 (65.0 cm), K42/14 (62.9 cm), N32/14 (61.2 cm), C2/11 (61.2 cm), F7/3 (59.6 cm), J14/8 (59.0 cm), and W39/12 (58.9 cm). Out of 32 progenies, 14 progenies showed significantly higher mean girth measurement than PB 260 after seven years of planting based on least significant difference test. However, only four progenies i.e. J14/22, N34/14, J14/8 and W39/12 were found to have significantly higher increment than PB 260. Out of 39 progenies, 17 were found to have significantly higher increment than PB 260 during tapping period. In term of bark thickness, genotype I12/21 showed significantly higher virgin bark and renewed bark after three years of tapping than PB 260 with 9.9 mm and 7.9 mm respectively. On the other hand, genotype J16/15 showed significantly lowest renewed bark with 4.9 mm. It was reported that germplasm materials are vigorous and possesses long straight boles (logs) that suitable for timber production (Ramli et. al, 1995) however. The latex production is low (Masahuling, 2005). As the additive genetic effect controlled the growth performance and latex yield production (Simmond, 1969; Tan and Subramaniam, 1975), it is suggested to incorporate the 1981 germplasm materials into the rubber breeding programme through cross-breeding. Thus, increase both growth vigour and latex production within the hybrid, thus producing better latex timber clones in the future. In addition, the introductions of germplasm materials into the rubber breeding programme are essential in order to improve the quality of future planting material.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): clones
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
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Nurmi-Rohayu A.H.. "Study on Performance of Clones in SSCT Derived from Hybridization among 1981 Hevea Germplasm and Oriental Clones". ไม่ระบุหน่วยงาน. ม.ป.ป.

Nurmi-Rohayu A.H.. "Study on Performance of Clones in SSCT Derived from Hybridization among 1981 Hevea Germplasm and Oriental Clones". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Study on Performance of Clones in SSCT Derived from Hybridization among 1981 Hevea Germplasm and Oriental Clones
Nurmi-Rohayu A.H.
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
Results of Some Hevea Clones from the Large Scale Clone Trials in Cambodia Preliminary Yield Potential Comparison on ½ S d/3 and ½ S d/4 Tapping Systems of Some Hevea Clones in Cambodia IMPROVEMENT AND APPLICATION OF THE TECHNIQUE OF MINI-SEEDLING BUDDING OF HEVEA BRASILIENSIS TOWARD SELECTION OF IMPROVED HEVEA BRASILIENSIS CLONES FOR SOUTH KONKAN: LONG TERM PERFORMANCE OF ORTET CLONES DEVELOPMENT OF DWARF CLONES OF HEVEA BRASILIENSIS Performance of RRII 400 Series Clones in a Small Holding: A Case Study A MODIFIED STIMULATION METHOD IN HEVEA BRASILIENSIS FOR REDUCING OXIDATIVE STRESS การพัฒนาเทคนิค Reverse dot blot hybridization สำหรับตรวจหาความผิดปกติของยีน β-thalassemia Developments of Reverse dot blot hybridization technique for detection of β-thalassemia mutation Growth and Yield Performance of Some Exotic Clones Of Hevea brasiliensis in North Kerala Region Recombination Breeding of Hevea brasiliensis in India: Clones Evolved From the 1983 Hybridization Programme
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