สืบค้นงานวิจัย
Management of Wild Hevea Genetic Resources in India: Yield and Growth Performance in Immature Phase
G. Prabhakara Rao - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Management of Wild Hevea Genetic Resources in India: Yield and Growth Performance in Immature Phase
ผู้แต่ง / หัวหน้าโครงการ (EN): G. Prabhakara Rao
บทคัดย่อ (EN): Ninty nine per cent of global natural rubber (NR) requirement is met by the Hevea brasiliensis (Willd, ex. Adr. De Juss). Muell. Arg. Cultuvars. Genetic resources of Hevea are fast eroding in the primary center of origin, Brazil. To broaden the genetic base of cultivated rubber. The International Rubber Research and Deve;p[,emt Board (IRRDB) organized an expedition during 1981 in the Amazon basin, Brazil. This expedition resulted in collection of over 64.736 seeds and budwood from 194 exceptionally good trees, As an IRRDB member country India has received a share of this collection during the period between 1984 and 1990. The wild Hevea accessions introduced into India are being conserved in various source bush nurseries and evaluated in a phased manner. These accessions were assessed in the first five years of growth to ascertain the extent of variability present in this wild population for various growth and yield attributes for the identification of desirable genes. Highly significant clonal variability was observed for yield and all the growth characters viz., girth in the 3rd and 4th year, girth increment per year, over 3 years, number of branches, crotch height, plant height and height increment except girth in the 2nd year. The yield ranged from 0.01 g/t/t (MT 5081) to 3.52 g/t/t (MT 4788), girth ranged from 3 cm (AC 493, RO 1374, RO 2367) to 15.90 cm (AC 1218) in the 2nd year and from 10.67 cm (RO 2328) to 37.50 cm (RO 3792) in the 5th year, girth increment from 0.67 cm (RO 309, AC 3905) to 10 cm (AC 577, AC 734), number of branches from 1.67 (RO 1754) to 13.50 (MT 1680, RO 4194), crotch height from 1.20 m (RO 4574) to 9.60 m (RO 335), plant height from 0.85 m (MT 5136) to 7.25 m (MT 2226) in the 2nd year and from 1.50 m (RO 4574) to 7.25 m (RO 229) in the 5th year, height increment over 3 years from 0.50 m (RO 4574) to 9.80 m (AC 989), Correlations worked out among the eleven quantitative traits revealed that yield was significantly correlated with all the growth characters. Based on this study, the top 10% of the potential accessions showing early growth vigour and promising juvenile yield (MT 4788, AC 226, AC 4155, MT 1007, AC 3905, RO 326, AC 3884, RO 1524, MT 905, RO 303 and AC 760) were identified which could be of use in future crop improvement programmes.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): growth
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
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G. Prabhakara Rao. "Management of Wild Hevea Genetic Resources in India: Yield and Growth Performance in Immature Phase". ไม่ระบุหน่วยงาน. ม.ป.ป.

G. Prabhakara Rao. "Management of Wild Hevea Genetic Resources in India: Yield and Growth Performance in Immature Phase". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Management of Wild Hevea Genetic Resources in India: Yield and Growth Performance in Immature Phase
G. Prabhakara Rao
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
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