Genetic enhancement of essential amino acids for nutritional enrichment of maize protein quality through marker assisted selection

Maize grain protein is deficient in two essential amino acids, lysine and tryptophan, defining it as of low nutritive value. The discovery of opaque2 ( o 2) gene has led to the development of quality protein maize (QPM) that has enhanced levels of essential amino acids over normal maize. However, th...

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Published in:Physiology and molecular biology of plants 2020-11, Vol.26 (11), p.2243-2254
Main Authors: Kaur, Ravneet, Kaur, Gurleen, Vikal, Yogesh, Gill, Gurjit Kaur, Sharma, Sunita, Singh, Jagveer, Dhariwal, Gaganpreet Kaur, Gulati, Ankit, Kaur, Amandeep, Kumar, Ashok, Chawla, Jasbir Singh
Format: Article
Language:English
Subjects:
Biological and Medical Physics
Biomedical and Life Sciences
Biophysics
Cell Biology
Life Sciences
Plant Physiology
Plant Sciences
Research Article
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Summary:Maize grain protein is deficient in two essential amino acids, lysine and tryptophan, defining it as of low nutritive value. The discovery of opaque2 ( o 2) gene has led to the development of quality protein maize (QPM) that has enhanced levels of essential amino acids over normal maize. However, the adoption of QPM is still very limited. The present study aims at improving the quality of normal four maize inbred lines (LM11, LM12, LM13 and LM14) of single cross hybrids; Buland (LM11 × LM12) and PMH1 (LM13 × LM14) released in India for different agro-climatic zones by introgressing o 2 allele along-with modifiers using marker assisted backcross breeding. Both foreground and background selection coupled with phenotypic selection were employed for selection of o2 specific allele and maximum recovery of the recurrent parent genome (87–90%) with minimum linkage drag across the crosses. The converted QPM lines had
ISSN:0971-5894
0974-0430
DOI:10.1007/s12298-020-00897-w