สืบค้นงานวิจัย
Reaction of the Polycross Progeny of Prepotent Clones to Two Major Leaf Diseases of Rubber (Hevea brasiliensis)
Sadanand K. Mushrif - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Reaction of the Polycross Progeny of Prepotent Clones to Two Major Leaf Diseases of Rubber (Hevea brasiliensis)
ผู้แต่ง / หัวหน้าโครงการ (EN): Sadanand K. Mushrif
บทคัดย่อ (EN): Abnormal leaf fall (ALF) disease caused by Phytophthora spp. And powdery mildew caused by Oidium heveae are the major leaf diseases of rubber in India. A yield loss of 38 to 56% due to ALF was reported when the trees are left6 unsprayed for one disease season whereas, the yield loss reported to be 8.1% due to powdery mildew in the clone PB 5/51 in Malaysia. Since protection using fungicides against the diseases is costly and likely to cause environmental hazards being toxic to animals and human beings, the alternative and more permanent approach is to develop tolerant/resistant cultivars. With this aim, a three-year study was undertaken to evaluate the polycross progeny of prepotent clones for their tolerance/susceptibility for ALF and powdery mildew diseases. Evaluation was conducted in a compact family block design with three replications and 4-5 trees per plot at a spacing of 4.9 x 4.9 m. A total of 150 progeny clones were evaluated in two field trials, one trial (Trial I) with 10 clones per progeny and the other (Trial II), with five clones per progeny. The field trials were laid out at the Central Experiment Station of the RRII at Chethackal in Ranni. The clones were evaluated for ALF and powdery mildew diseases in the 11th to 13th year after planting. Powdery mildew disease was assessed during February/March of each season. For this purpose, five leaves collected from each tree from the terminal whorls of 4 branches were observed for disease severity. The leaves were graded according to the intensity of infection on 0-5 scale where 0 = no disease; 1 = 1-10% disease severity; 2 = 11-25% disease severity; 3 = 26-50% disease severity; 4 = 51-75% disease severity and 5 = >75% disease severity. For ALF disease, the assessment on per cent leaf retention was carried out during September – October period after the disease season. The data obtained for three consecutive years were analysed and computed familywise and clonewis. The results on powdery mildew indicated that the disease severity among the families ranged from 23-59%, 35-55% and 47-83% in 1st, 2nd and 3rd year of studies, respectively whereas the per cent retention of leaves in case of ALF disease ranged from 51-76%, 47-67% and 15-60% in 1st, 2nd and 3rd years, respectively in both the trials. This highlights of the fact that the intensity of both thd disease was higher in the 3rd year than in 1st and 2nd years of studies. Interestingly, results of the pooled data analysis on the performance of individual clones within a family against powdery mildew disease indicated that two clones viz., 104 and 54 of the family PB 5/76 as the female parent showed disease severity of less than 25% even when the disease intensity was high in 3rd year. It is observed from the results on the pooled data analysis obtained from three years on the evaluation of individual clones within family against ALF disease that the clone 128 of the family AVT 73 showed highest leaf retention of 79% followed by the clones 65 of the family AVT 73, 75 of PB 217 and 47 of PB 215 with leaf retention of 71%. In trial II, the clones 132 and 69 of the family PB 252 showed leaf retention of 73% over a period of 3 year assessment. The individual yearwise assessment of the 3rd year wherein the disease intensity was more, has shown that with the exception of clone 73 with leaf retention of 58%, all other clones performed well against ALF disease with per cent leaf retention ranging from 65% to 76%. Altogether, 73 clones in Trial I and 34 clones from Trial II showed per cent leaf retention ranging from 50 to 75% The girth, timber and rubber yield of these clones have already been reported. Among the clones found promising in terms of reaction to the ALF disease, clone 132 evolved from the parent PB 252 is reported to be latex timber clone with >80% improvement in yield over the high yielding clone RRII 105 coupled with high timber yield. Clone 132 in this study found to be consistently tolerant to ALF disease and thus found to be a promising clone for future. Clone 69 also derived from PB 252 and was found tolerant to ALF disease is reported to be a timber latex clone with promising rubber yield and high timber yield. Clone 128 evolved from the parent AVT 73 found to be tolerant to ALF disease in this study is reported to be timber clones with high timber yield though rubber yield is less.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): Oidium heveae
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

การอ้างอิง

Sadanand K. Mushrif. "Reaction of the Polycross Progeny of Prepotent Clones to Two Major Leaf Diseases of Rubber (Hevea brasiliensis)". ไม่ระบุหน่วยงาน. ม.ป.ป.

Sadanand K. Mushrif. "Reaction of the Polycross Progeny of Prepotent Clones to Two Major Leaf Diseases of Rubber (Hevea brasiliensis)". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Reaction of the Polycross Progeny of Prepotent Clones to Two Major Leaf Diseases of Rubber (Hevea brasiliensis)
Sadanand K. Mushrif
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
TOWARD SELECTION OF IMPROVED HEVEA BRASILIENSIS CLONES FOR SOUTH KONKAN: LONG TERM PERFORMANCE OF ORTET CLONES DISEASES OF RUBBER (Hevea brasiliensis) IN THE PHILIPPINES, CONTROL AND SCREENING FOR RESISTANCE Identification of Resistance of Hevea brasiliensis Clones to Corynespora Leaf Fall Disease Components of Inorganic Phosphates in Rhizosphere of Rubber Tree (Hevea brasiliensis) ความหลากหลายทางพันธุกรรมของเชื้อรา Phytophthora spp. สาเหตุโรคของยางพารา (Hevea brasiliensis Muell.Arg.) ในพื้นที่เพาะปลูกจังหวัดสุราษฎร์ธานี Evaluation of Rubber (Hevea brasiliensis) Modern Clones under Certain Stressful Climatic Conditions of Odisha Performance of Selected Exotic and Indigenous Rubber (Hevea brasiliensis) Clones in Traditional Region of Kerala, India Identification of Rubber Clones (Hevea brasiliensis) Using Inter Simple Sequence Repeat (ISSR) Markers รายงานการวิจัยฉบับสมบูรณ์ ความหลากหลายทางพันธุกรรมของเชื้อรา Phytophthora spp. สาเหตุโรคของยางพารา (Hevea brasiliensis Muell. Arg.) ในพื้นที่เพาะปลูกจังหวัดสุราษฎร์ธานี Some Considerations Concerning the Yield Potential of Some Clones (Hevea brasiliensis)
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