PJB-2018-658
COMPARISON OF BARLEY DH PROGENIES WITH THEIR PARENTS FOR GRAIN NUTRIENTS AND STARCH PROPERTIES
Bakht Nisa Mangan
Abstract
Macro and micro nutrients are essential for human growth and development. It is reported that about one billion people are suffering from nutrient deficiencies all over the world. Among cereals, wheat and barley are main source for carbohydrates, proteins, vitamins, dietary fiber and minerals such as iron, copper, manganese Zinc, Iron and selenium. Focusing these importance, a field and Lab study was thus undertaken during 2011-2012 and 2012-2013 to investigate the variability and availability for trace elements such as Zn, Fe, Se, Mn, Cu with maximum available ratio of starch properties like Amylose and Amylopectin among 97 barley DHs along with their parents ‘Steptoe’(CI15229) and ‘Morex’(CI15773). The large number of DH progenies were identified which possesses great availability and variability for grain Fe, Zn, Cu, Mn and Se content along with amylose and amylopectin ratio as compared to their parents. Tested grain nutrient concentration in DH lines were averaged from 14.6mg kg-1 to 315μg kg-1 during the study year of 2011-12 while their parents were averaged from 13. 4mg kg-1 to 97.6μg kg-1. In case of starch properties, same type of difference was observed. During the year 2012-13, grain nutrient concentration was averaged from 14.5mg kg-1 to 316.7μg kg-1 while parents of DHs were from 14.5mg kg-1 to 96.6μg kg-1. Among all these grain nutrients, DHs barley showed more variability for selenium concentration as compared to other four elements. Results indicated that 97 barley DH lines showed great variability and diversity for selenium concentration (+16-669μg kg-1 with average +315μg kg-1). It is also concluded that the amylose/amylopectin ratio in barley DHs had great variation. Out of 97 analyzed progenies, 37 DHs produced normal content of amylose (20–30%), while ten progenies had more than 30% of the apparent amylase content. Our results indicated that the DHs had considerable variation for all five elements (Fe, Zn, Se, Mn, Cu) along with amylose and amylopectin ratio compared to their parents, which not only provide some useful information about the difference in the nutrient concentration and amount of amylose and amylopectin content among these DH progenies, but also offered some prospect of using selected lines for barley quality improvement.
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