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Heterosis, potence ratio, phenotypic correlation and path coefficient analysis for grain yield and it's components in barley (Hordeumvulgare L. )

قوة الهجين و درجة السيادة و معاملي الارتباط و المرور للغلة الحبية و بعض مكوناتها في الشعير (Hordeum vulgare L.)

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 Publication date 2014
  fields Field Crops
and research's language is العربية
 Created by Shamra Editor




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A half diallel set of crosses among six highly diverse barley (Hordeum vulgare L.) genotypes were evaluated at Karahta Research Station, General Commission of Scientific Agricultural Research (GCSAR), during 2010-2011 and 2011-2012 seasons to study heterosis, potence ratio, correlations among traits and path coefficient analysis for number of spikes per plant, number of grains per plant, number of grains per spike, biological yield ,and grain yield per plant. Heterosis effects for seed yield ranged from%-89.52 (T-6669×S-6303) to%16.99 (Arabi abiad mohsan×S-6689) and from%-49.94 (L-6711×S-6689) to %-1. 35 (Arabi abiad mohsan×S-6689) relative to mid and better parents respectively. Potence ratio values ranged from 1.14 (number of spikes per plant) to 3.50 (biological weight) indicating that non-additive gene action was more important in controlling all studied traits. Correlation coefficients among traits indicated that seed yield was positively and significantly associated with each of number of spikes per plant (0.289), number of grains per plant (0.832), number of grains per spike (0.587), and biological yield (0.708) traits. Path coefficient analysis indicated that number of grains per plant trait had high positive direct effects on grain yield.


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Research summary
تناولت الدراسة تنفيذ تهجين نصف تبادلي بين ستة طرز وراثية متنوعة من الشعير في محطة بحوث قرحتا التابعة للهيئة العامة للبحوث العلمية الزراعية خلال الموسمين الزراعيين 2010-2011 و2011-2012. هدفت الدراسة إلى تقدير قوة الهجين ودرجة السيادة ومعاملي الارتباط المظهري والمرور لعدد من الصفات مثل عدد السنابل في النبات، عدد الحبوب في النبات، عدد الحبوب في السنبلة، الغلة الحيوية، والغلة الحبية. أظهرت النتائج أن قيم قوة الهجين لصفة الغلة الحبية تراوحت بين -89.52% و16.99%، بينما تراوحت قيم درجة السيادة بين 1.14 و3.50، مما يشير إلى سيطرة الفعل الوراثي اللاتراكمي على الصفات المدروسة. كما أظهرت النتائج وجود ارتباط إيجابي ومعنوي بين صفة الغلة الحبية وكل من عدد السنابل في النبات، عدد الحبوب في النبات، عدد الحبوب في السنبلة، والغلة الحيوية. وأشارت نتائج تحليل المسار إلى أن صفة عدد الحبوب في النبات كانت الأكثر مساهمة في تباين الغلة الحبية. بناءً على هذه النتائج، أوصت الدراسة بإدخال الطرز الوراثية (S-6689) و(Arabi abiad mohsan) في برامج تربية الشعير لتحسين الغلة الحبية.
Critical review
تعتبر الدراسة شاملة ومفصلة في تحليلها لقوة الهجين ودرجة السيادة ومعاملي الارتباط والمرور في الشعير. ومع ذلك، يمكن تحسين الدراسة من خلال تضمين تحليل أعمق للعوامل البيئية وتأثيرها على النتائج، بالإضافة إلى دراسة تأثير التغيرات المناخية على الصفات المدروسة. كما يمكن توسيع نطاق الدراسة ليشمل طرز وراثية أخرى من مناطق جغرافية مختلفة لتحسين دقة النتائج وتعميمها.
Questions related to the research
  1. ما هي الطرز الوراثية التي تم استخدامها في الدراسة؟

    تم استخدام ستة طرز وراثية متنوعة من الشعير وهي: Arabi abiad mohsan، M-6544، T-6669، L-6711، S-6689، وS-6303.

  2. ما هي الصفات التي تم دراستها في هذه البحث؟

    تم دراسة عدد السنابل في النبات، عدد الحبوب في النبات، عدد الحبوب في السنبلة، الغلة الحيوية، والغلة الحبية.

  3. ما هي النتائج الرئيسية لتحليل معامل الارتباط؟

    أظهرت النتائج وجود ارتباط إيجابي ومعنوي بين صفة الغلة الحبية وكل من عدد السنابل في النبات، عدد الحبوب في النبات، عدد الحبوب في السنبلة، والغلة الحيوية.

  4. ما هي التوصيات التي قدمتها الدراسة بناءً على النتائج؟

    أوصت الدراسة بإدخال الطرز الوراثية (S-6689) و(Arabi abiad mohsan) في برامج تربية الشعير لتحسين الغلة الحبية، واستخدام صفة عدد الحبوب في النبات كمؤشر انتخابي في برامج التربية.


References used
Al-Shalaldeh, G and M. A. Duwayri. 1986. Inheritance of morpho-physiological characters and grain yield in durum wheat crosses. Rachis, 5(1): 37-41
Bouzerzour, H. and A. Djakoune. 1997. Inheritance of grain yield and grain yield components in barley. Rachis, 16(1/2): 9-16
Dewey, J.R. and K. H. Lu . 1959. Correlation and path coefficient analysis of components of crested wheat grass seed production. Agron. J. 51:515-518
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The present investigation was undertaken to estimate phenotypic correlation and path coefficient analysis for grain yield and its components in maize. Four local genotypes of yellow maize were evaluated in 2008 and 2009 growing seasons at two loca tions i.e. Damascus and Dir Al-Zor under three nitrogen fertilization levels (130, 195 and 260 of N. ha-1), The nitrogen fertilizer was applied at two splits. Split split plot design was used with 4 replications. Results of phenotypic correlation values showed that grain yield at Damascus location was positively and significantly associated with ear height (r= 0.204**), ear length (r= 0.205**) and number of rows per ear (r= 0.228**). On the other hand, grain yield at Dir Al-Zor location was positively and significantly associated with all studied traits at combined data whereas, it was positively and significantly associated with ear length at three levels and combined data (0.305*, 0.410**, 0.347** and 0.375**, respectively). The data of path coefficient analysis showed that ear length, ear height and number of rows per ear had positive direct effects on grain yield variation and thus grain yield improvement can be achieved through selection for ear length and ear height at Damascus location (11.06%). On the other side, data showed that each of ear height, number of kernels per row and 100-kernel weight had positive direct effects on grain yield variation (32.98%) and thus, 100-kernel weight can be considered as selection criteria may lead to the improvement of grain yield in yellow maize at Dir Al-Zor location.
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