آخر الأخبار
التباينات الوراثية والمظهرية، معامل التوريث، معامل المسار وتلازم بعض صفات، الذرة الصفراء (.Zea mays L)
2014, Volume 9, issue 33,pp 59-76| Cite as
The genetic and appearance variations in the factories of genetics : Factories of way and combination of some of yellow corn (ZEA MAYS L.)
| authors |
Slash Al-Awad , Thoraya Al-Nwege , Ahmad Ali Al-Ali Alkhalf , Ayman Al-Arfe |
| Abstract |
Experiments were carried out at Raqqa Research Center (RRC) and Ali Baglih Research Station (ABRS), Raqqa governorate, Syria, in 2013 to study phenotypic and genotypic variation, heritability and association between yield and its components in some maize (Zea mays L) genotypes (15 crosses, 8 parents and check) in linextester analysis. The experiments were arranged in a randomized complete block design (RCBD) with three replications. The presence of a wide range from significant genotypic and phenotypic variation showed by most of the studied traits. High broad sense heritability (h'B) estimate was showed by ear height (0.94) and plant height (0.97), while High narrow sense heritability (h’N) estimate was recorded by number of kernel/row (0.48) and ear diameter (0.50) at RRC. At ABRS, the number of kernels/row, ear diameter and 100 kernels weight exhibited high broad sense heritability (h'B) estimates (0.83, 0.83 and 0.86), respectively. while high narrow sense heritability (hn) estimates showed by number of kernels/row and ear length (0.67 and 0.78), respectively. The highest value of genetic advance as mean percent was obtained for grain yield (53.8%) followed by ear height (29.9%) at RRC. While at ABRS, the highest (32.6 and 31.9%) genetic advance was recorded by grain yield and number of kernel per row, respectively. Grain yield was highly and positively (r20.71**) correlated with the 100 kernel weight, ear diameter, ear length, plant height and ear height. Its genotypic correlation coefficients with days to tasseling, days to silking and number of kernel per row were positive and significant (r20.45*). Grain yield was no significant positive correlated (r20.34) with number of rows per ear. The direct effect for path analysis showed high negative associated between grain yield with earliness traits, and low positive with plant height, ear height and ear diameter, and moderate positive with number of rows per ear and ear length, and high positive with number of kernel per row and 100 kernel weight. Based on the genotypic correlation and path analysis the number of rows per ear, number of kernel per row, ear length and 100 kernel weight were the most important traits that could be used as selection criteria to improve grain yield.
Key Words: Maize, Variation, Heritability, correlation, Path Analysis. |
| الكاتب |
شلاش العواد، ثريا النويجي ، أحمد علي العلي الخلف, أيمن العرفي |
| الملخص |
نفذت التجارب الحقلية في مركز البحوث العلمية الزراعية بالرقة ومحددة بحوث العلي باجلية التابعة له بمحافظة الرقة للموسم 2013 لدراسة التباين الوراثي والمظهري، معامل التوريث والتلازم مابين الغلة الحبية ومكوناتها في بعض الطرز الوراثية للذرة الصفراء (15هجين فردي و 8 أباء وشاهد) والناتجة بطريقة سلالة مختبر والمزروعة وفق تصميم القطاعات العشوائية الكاملة مع ثلاثة مكررات. وجد مدى واسع من التباين الوراثي، والمظهري بين الطرز الوراثية لأغلب الصفات المدروسة. سجلت صفتي ارتفاع النبات، والعرنوس أعلى قيم التباين الوراثي، والمظهري. سجل أعلى معامل للتوريث بالمعنى الواسع الارتفاع العرنوس((0.94وارتفاع النبات (0.97)، بينما سجلت عدد الحبوب بالصف ( 0.48)، وقطر ارتبطت الغلة الحبية ايجابيا وعالي المعنوية (r≥0.71)مع وزن ال100 حبة، قطر العرنوس، طول |
