شناسایی منابع مقاومت به نماتد مولد گره ریشه در چغندرقند

نویسندگان

گروه بیماری‌شناسی گیاهی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران

چکیده

چغندرقند یکی از میزبان‌های نماتد مولد گره ریشه است. در این مطالعه طی سه آزمایش جداگانه، دو جمعیت گرده‌افشان باز و فامیل‌های نیمه خواهری آن‌ها (37 فامیل)،دو هیبرید چغندرقند و ارقام تجاری مقاوم به نماتد سیستی (Heterodera schachtii)شامل توکان، کاکتوس، سانتا، پائولتا، پائولینا، فرناندو، ساکارا و شکوفا، در برابر Meloidogyne javanica وM. arenaria در شرایط گلخانه ارزیابی شدند. برای ارزیابی، گیاهچه‌‌ها با 500 و 750 لارو سن دوم نماتد مایه‌زنی شدند. حدود 70 روز پس از مایه‌زنی، گیاهان برداشت و تعداد گره‌های روی ریشه شمارش شدند. گیاهان با10 و کمتر از 10 گره در ریشه به عنوان مقاوم شناخته شدند. نتایج نشان داد که جمعیت‌های گرده‌افشان باز SB33 و SB34 و کلیه فامیل‌های نیمه خواهری آن‌ها مقاوم به نماتد مولد گره ریشه بودند و مقاومت در جمعیت SB33 به صورت غالب به ارث می‌رسد. همچنین تمامی ارقام مقاوم به نماتد سیستی، حساس به نماتد مولد گره ریشه بودند.

کلیدواژه‌ها


عنوان مقاله [English]

Identification of Resistance Sources to Root-Knot Nematode in Sugar Beet

نویسندگان [English]

  • M. Bakooie
  • E. Pourjam
  • S. B. Mahmoudi
  • N. Safaie
چکیده [English]

Sugar beet (Beta vulgaris) is one of the hosts for root-knot nematodes. In this study, two open-pollinated populations and their half-sib families (37 families), two hybrids of sugar beet and the commercial resistant cultivars to cyst nematode (Heterodera schachtii), including Tucan, Cactus, Saneta, Pauletta, Paulina, Fernando, Sucarra and Shokufa, were evaluated against Meloidogyne javanica and M. arenaria in the separate experiments under greenhouse condition. Seedlings were inoculated with 500 and 750 second-stage juveniles. About 70 days after inoculation, the plants were taken off and the number of root-galls in roots was counted. Individual plants with 10 and less than 10 galls in root were considered as a resistant. Results indicated that SB33 and SB34 open-pollinated populations and total their half-sib families were resistant to root-knot nematode and the resistance in SB33 population is inherited in a dominant manner. Also the all resistant cultivars to cyst nematode, were susceptible to root-knot nematode.

کلیدواژه‌ها [English]

  • sugar beet
  • half-sib family
  • Root-knot nematode
  • resistance
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