avaliação de linhagens, híbridos f1 e cultivares de pimentão quanto à resistência a meloidogyne spp. evaluation of resistance of lines, hybrids f1 and cultivars of sweet pepper to meloidogyne spp.
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Abstract
With the purposes of evaluating F1 hybrids of sweet pepper, together with their parents, for resistance to Meloidogyne incognita (races 1, 2, 3 and 4) and M. javanica nematodes, an experiment was conducted in glasshouse conditions in the facilities of Pioneer Sementes Ltda, in Ijaci, MG, Brazil. A randomized block in split-plot design was used with five plots, composed of four races of M. incognita and one isolate of M. javanica, and 48 subplots, composed of 47 genotypes of sweet pepper and one cultivar of tomato (Ângela Gigante I-5100) as a standard check. Five replicates and eight plants in each subplot were used. Inoculation was done with 60 eggs/mL of substrate mixture of vermiculite, Pinus sp. bark and carbonized rice husk. After 60 days following inoculation, the evaluations were performed. All the cultivars and standard-lines (line 004 and line 006) were susceptible to the races 1, 2, 3 and 4 of M. incognita. All the genotypes of sweet pepper were resistant to M. javanica. Almost all of the experimental lines were proved to be resistant to all of the four races of M. incognita. The same occurred to most of the experimental hybrids F1, although the degree of resistance of the hybrids in general was lower than that of their respective resistant parents. It is thus proven to be feasible to utilize F1 hybrids by crossing resistant to susceptible sweet pepper lines to control the nematodes M. incognita and M. javanica through varietal resistance.
بهدف تقييم هجن الجيل الأول (F1) من الفليفلة الحلوة، إلى جانب آبائها، لمقاومة نيماتودا *Meloidogyne incognita* (السلالات 1 و2 و3 و4) ونيماتودا *M. javanica*، أُجريت تجربة في ظروف البيوت المحمية بمرافق شركة "بايونير للبذور المحدودة" في إيجاسي، ميناس جيرايس، البرازيل. واستُخدم تصميم القطاعات العشوائية الكاملة بنظام القطع المنشقة بخمس قطع رئيسية، مكوّنة من أربع سلالات لـ *M. incognita* وعزلة واحدة لـ *M. javanica*، و48 قطعة منشقة، مكوّنة من 47 طرازاً وراثياً من الفليفلة الحلوة وصنف طماطم واحد (Ângela Gigante I-5100) كشاهد قياسي. واستُخدمت خمس مكررات وثماني نباتات في كل قطعة منشقة. وتمت العدوى بـ 60 بيضة/مل من خليط بيئة نمو مكوّن من الفيرميكوليت ولحاء الصنوبر (*Pinus* sp.) وقشور الأرز المتفحمة. وبعد مرور 60 يوماً على التلقيح، نُفّذت التقييمات. تبيّن أن جميع الأصناف والسلالات القياسية (السلالة 004 والسلالة 006) كانت قابلة للإصابة بالسلالات 1 و2 و3 و4 لـ *M. incognita*. وكانت جميع الطرز الوراثية للفليفلة الحلوة مقاومة لـ *M. javanica*. وثبتت مقاومة معظم السلالات التجريبية لجميع السلالات الأربع لـ *M. incognita*. وانطبق الأمر ذاته على معظم هجن الجيل الأول (F1) التجريبية، رغم أن درجة مقاومة الهجن كانت عموماً أقل من مقاومة آبائها المقاومة المقابلة. ومن ثم، ثبتت جدوى استخدام هجن الجيل الأول (F1) عبر تضريب سلالات فليفلة حلوة مقاومة مع أخرى قابلة للإصابة لمكافحة نيماتودا *M. incognita* و*M. javanica* من خلال المقاومة الصنفية.
| Reference Key |
peixoto1999pesquisaavaliao
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|---|---|
| Authors | ;José Ricardo Peixoto;Wilson Roberto Maluf;Vicente Paulo Campos |
| Journal | proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006 |
| Year | 1999 |
| DOI |
10.1590/S0100-204X1999001200013
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| URL | |
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