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>Assessment of genetic variability and heritability for grain yield and its associated traits in F2 populations of bread wheat (Triticum aestivum L.)
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Assessment of genetic variability and heritability for grain yield and its associated traits in F2 populations of bread wheat (Triticum aestivum L.)
The current research was carried out to determine the genetic variability and heritability for grain yield and its associated traits of six F 2 bread wheat segregating populations originated from seven parental varieties at the experimental field of Southern Wheat Research Station, ARI, Tandojam, Sindh. The experiment was carried out in randomized complete block design with three replications for plant height (cm), tillers plant -1 , spike length (cm), spikelets spike -1 , grains spike -1 , grain weight of main spike (g), grain yield plant -1 (g), seed index (g), biological yield plant -1 (g) and harvest index (%). Many variation were observed in all the studied traits giving an evidence of the crop improvement. The result regarding analysis of variance, all the genotypes, parents and hybrids displayed highly significant and significant differences for the all the attributes at 0.01% and 0.05% probability level. Among the F 2 hybrids, the cross Khirman x TD-1 was best (92.76%) in the contribution of heritability for plant height. Kiran-95 x Marvi-2000 performed notably for tillers plant -1 (83.51%), spike length (88.69%), spikelets spike -1 (95.62%), grains spike -1 (87.90%), grain weight of main spike (91.99%), grain yield plant -1 (94.13%), seed index (88.03%) and harvest index (89.12%). In case of biological yield plant -1 (85.21%), the cross Bakhar-2002 x TD-1 (85.21%) was the highest heritability contributor. It is concluded that these hybrids may be the best choices for the exploitation of heritability and hybrid crop development in bread wheat or selection of desirable plants from later segregating generation.
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机译：目前的研究进行，以确定粮食产量及其相关的六个F 2面包小麦分离群体的性状的遗传变异和遗传南方小麦研究站，ARI，Tandojam，信德省的试验田起源来自七个父母品种。该实验在随机完全块设计中进行，植物高度（cm），分蘖厂-1，尖峰长度（cm），小穗穗-1，谷粒重量，主穗（g）粒重（g），籽粒产株-1（g），种子指数（g），生物屈服植物-1（g）和收获指数（％）。在所有研究的特征中观察到许多变异，给出了作物改善的证据。关于方差分析的结果，所有基因型，父母和杂种对所有属性的显着和显着差异显示在0.01％和0.05％的概率水平。在F 2杂交种中，交叉Khirman X TD-1最佳（92.76％）在植物高度的潜力贡献中。 Kiran-95 x Marvi-2000显着表现出耕地厂-1（83.51％），穗长度（88.69％），穗穗穗--1（95.62％），谷物穗-1（87.90％），主穗粒重（ 91.99％），籽粒产株-1（94.13％），种子指数（88.03％）和收获指数（89.12％）。在生物屈服植物-1（85.21％）的情况下，交叉Bakhar-2002 x TD-1（85.21％）是最遗传的贡献者。得出结论，这些杂种可能是在面包小麦或从后来的隔离产生的面包小麦或期望植物的选择中利用遗传性和杂种作物发育的最佳选择。
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