GENETIC-PHYSIOLOGIC AND GENETIC-MORPHOLOGIC COMPONENTS IN SOYBEAN

M. Elsahookie, M.

	GENETIC-PHYSIOLOGIC AND GENETIC-MORPHOLOGIC COMPONENTS IN SOYBEAN
The Iraqi Journal of Agricultural Science
Article 1, Volume 37, Issue 2, 2006, Pages 63-68
Author
M. M. Elsahookie
Abstract
To determine the genetic-physiologic and genetic-morphologic components in soybean, live genotypes were grown in a randomized complete block design of four replicates. Data were recorded on plants grown in a one square meter of each experimental unit. The genetic-physiologic components of the five genotypes of soybeans ranged between 3.8 and 8.1 g/m/d of growth rate, 95 and 137 d of growing season, 360 and 1110 g/m2 TDM, and 28.1% and 40.4% of harvest index. Meanwhile, the genetic -morphologic components ranged between 765 and 1310 pod/m , 1.4 and 2.1 seed/pod, and 95 and 177 mg/seed which gave 145 and 393 g/plant of seeds. Results obtained showed that plant growth rate was the most effective variable to obtain high TDM/plant, then days of growing season. The best cultivar to give higher TDM and seed yield should has longer period from planting to blooming, along with higher growth rate and moderate harvest index. However, the most important genetic-morphologic component was number of pods/plant, then seed weight. So, to develop a high yielding cultivar of soybean we need to select plants of higher growth rate, higher number of pods/plant, longer period from planting to blooming and moderate harvest index.

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