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Protein quality enhancement in temperate corn through introgression of o2o2 using marker assisted backcross and shuttle breeding

Published online by Cambridge University Press:  18 April 2024

Shamshir ul Hussan*
Affiliation:
Dryland Agricultural Research Station, Rangreth, SKUAST-Kashmir, Srinagar, India
Mohammad Ashraf Rather
Affiliation:
Division of Genetics and Plant Breeding, Faculty of Agriculture, SKUAST-Kashmir, Sopore, Baramulla, India
Zahoor Ahmad Dar
Affiliation:
Dryland Agricultural Research Station, Rangreth, SKUAST-Kashmir, Srinagar, India
Munezeh Rashid
Affiliation:
Division of Genetics and Plant Breeding, Faculty of Agriculture, SKUAST-Kashmir, Sopore, Baramulla, India
Azra Khan
Affiliation:
Division of Genetics and Plant Breeding, Faculty of Agriculture, SKUAST-Kashmir, Sopore, Baramulla, India
Asif Bashir Shikari
Affiliation:
Division of Genetics and Plant Breeding, Faculty of Agriculture, SKUAST-Kashmir, Sopore, Baramulla, India
Aflaq Hamid
Affiliation:
National Seed Project Laboratory, Faculty of Horticulture, SKUAST-Kashmir, Shalimar, Srinagar, India
Gowhar Ali
Affiliation:
National Seed Project Laboratory, Faculty of Horticulture, SKUAST-Kashmir, Shalimar, Srinagar, India
Mohd Altaf Wani
Affiliation:
Division of Genetics and Plant Breeding, Faculty of Agriculture, SKUAST-Kashmir, Sopore, Baramulla, India
Ajaz Ahmad Lone
Affiliation:
Dryland Agricultural Research Station, Rangreth, SKUAST-Kashmir, Srinagar, India
Seerat un Nissa
Affiliation:
Dryland Agricultural Research Station, Rangreth, SKUAST-Kashmir, Srinagar, India
*
Corresponding author: Shamshir ul Hussan; Email: gpbshamshir@skuastkashmir.ac.in

Abstract

Quality protein maize (QPM) has protein quality of opaque 2 (>0.074% tryptopan) with endosperm modifiers which turn its kernels vitreous that is similar to normal maize. Use of QPM as a cereal can significantly improve daily intake of lysine and tryptophan for humans and livestock. However QPM cultivars have lower yields due to trait compensation. Therefore, a breeding programme was carried out to convert parental lines of Shalimar maize hybrid 5 (SMH-5) viz. IML-187 and BML-6 into QPM versions. Marker polymorphism was worked out in donors and recipients. IML-187 was crossed with DQL-2029-1 and BML-6 was crossed with DQL-779-2-9. The first and second backcross generations involving IML-187 as recurrent parent were marked as BC1F1 (A) and BC2F1 (A) respectively, whereas those involving BML-6 were designated as BC1F1 (B) and BC2F1 (B) respectively. The BC2F2 lines derived from two generation of backcrossing coupled with SSR marker and phenotypic background and foreground selection were advanced to BC2F3. Approximately 80–90% of RPG similarity was observed in BC2F2 lines. Eight lines namely IML-187 × DQL-2029-1- BC2F3:06, 07 and 23: BML-6 × DQl-779-2-9: 02,04,09,20 and 13 were identified from BC2F3 to have tryptophan higher than 0.075% and <25% opaqueness. These lines were used for trait fixing and crosses were made to produce QPM version of SMH-5. Six improved versions of SMH-5 were selected for higher grain yield and tryptophan content and are to be employed in further testing and varietal release in Northern Hill Zone (NHZ) in India.

Information

Type
Research Article
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of National Institute of Agricultural Botany

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