تقدير معامل المسار والاختلافات الوراثية والمظهرية لسبعة تراكيب وراثية من الرز بتأثير ثلاث مواعيد زراعة
فليح عبد جابر الجبوري و رزاق لفته اعطيه و خضر عباس حميد و حميد مجيد رضيوي و كرار خالد محسن
DOI:
https://doi.org/10.59658/jkas.v3i2.24Keywords:
تراكيب وراثية من الرز، معامل المسار، الإختلافات الوراثية والمظهرية، مواعيد زراعة, Rice genetics, path coefficient, phenotypic and genotypic variationAbstract
نفذت تجربة حقلية في محطة أبحاث الرز في المشخاب والواقعة في محافظة النجف الاشرف في العراق للموسم الزراعي الصيفي لعام 2013 وباستخدام سبعة تراكيب وراثية من الرز هي: ( T85 و LT2 و HT1 و MRBF-0174 وMRFA-01-7-11 وMRBF-0167 والياسمين) لتقدير معامل المسار ومعامل الاختلاف الوراثي والمظهري، وتعد هذه من المتطلبات الهامة لبناء برامج التربية. حققت قيم معامل الإختلاف المظهري والوراثي إختلافات في نتائجها بإختلاف مواعيد الزراعة، وتراوحت قيمها بين العالية والمتوسطة والواطئة، في معامل المسار أظهرت صفة وزن 1000 حبة تاثير مباشر موجب على حاصل الحبوب وتاثير غير مباشرة موجب على حاصل الحبوب من خلال صفة النسبة المئوية لعدم الخصب للموعد الاول وطول الدالية للموعد الثاني ومن خلال النسبة المئوية لعدم الخصب وعدد الحبوب في الدالية في الموعد الثالث ، وعليه نوصى إختيار صفة وزن 1000 حبة بوصفها هدفا اساسا لزيادة حاصل الحبوب، مع الاخذ بنظر الإعتبار الصفات المهمة الأخرى منها عدد الحبوب في الدالية ونسبة عدم الخصب.
الكلمات المفتاحية / تراكيب وراثية من الرز، معامل المسار، الإختلافات الوراثية والمظهرية، مواعيد زراعة.
Estimate of the path coefficient and phenotypic and genotypic variation of seven rice genotypes affect by sowing dates
Flayeh Abed Jaber Aljbory* Razaq Lafta Attiya**
Khidhir Abbas* Hameed Hameed Majeed Rdhaiwi *
Karrar Khaled Mohsen *
Agricultural Research Office*
College of Agriculture - Karbala University**
Abstract
Afield trial was conducted at Al-Mishkhab Rice Research Station in Najaf province during rice season 2013 used seven rice genetics are: (T85, LT2, HT1, MRBF-0174, MRFA-01-7-11, MRBF-0167, Jasmine) to estimate the path coefficient and Phenotypic and Genotypic variation coefficients, this is the important requirements for establish breeding programs. The Phenotypic and Genotypic variation coefficients values achieved differences in the results by different sowing dates, and the values ranged between high, medium and low, and 1000-grain weight showed direct and indirect effected on grain yield through other characters, therefore recommended chose 1000-grain weight described as a key objective to increase the grain yield, taking into consideration other important characters such us number of grains per panicle and the percentage of unfertile grains.
Keywords/ Rice genetics, path coefficient, phenotypic and genotypic variation,
sowing dates.
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