Development of sub-tropically adapted diverse provitamin-A rich maize inbreds through marker-assisted pedigree selection, their characterization and utilization in hybrid breeding
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Title |
Development of sub-tropically adapted diverse provitamin-A rich maize inbreds through marker-assisted pedigree selection, their characterization and utilization in hybrid breeding
Not Available |
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Creator |
Hriipulou Duo
Firoz Hossain Vignesh Muthusamy Rajkumar U. Zunjare Rajat Goswami Gulab Chand Subhra J. Mishra Rashmi Chhabra Munegowda M. Gowda Saikat Pal Aanchal Baveja Jayant S. Bhat Mehar C. Kamboj Bhupender Kumar John J. Amalraj Rajesh Khulbe Bhukya Prakash C. N. Neeraja Sujay Rakshit Om P. Yadav |
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Subject |
Sub-tropically adapted diverse provitamin-A rich maize inbreds
Marker-assisted pedigree selection Hybrid breeding |
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Description |
Not Available
Malnutrition has emerged as one of the major health problems worldwide. Traditional yellow maize has low provitamin-A (proA) content and its genetic base in proA biofortification breeding program of subtropics is extremely narrow. To diversify the proA rich germplasm, 10 elite low proA inbreds were crossed with a proA rich donor (HP702-22) having mutant crtRB1 gene. The F2 populations derived from these crosses were genotyped using InDel marker specific to crtRB1. Severe marker segregation distortion was observed. Seventeen crtRB1 inbreds developed through marker-assisted pedigree breeding and seven inbreds generated using marker-assisted backcross breeding were characterized using 77 SSRs. Wide variation in gene diversity (0.08 to 0.79) and dissimilarity coefficient (0.28 to 0.84) was observed. The inbreds were grouped into three major clusters depicting the existing genetic diversity. The crtRB1-based inbreds possessed high β-carotene (BC: 8.72μg/g), β-cryptox- anthin (BCX: 4.58μg/g) and proA (11.01μg/g), while it was 2.35μg/g, 1.24μg/g and 2.97μg/g in checks, respectively. Based on their genetic relationships, 15 newly developed crtRB1- based inbreds were crossed with five testers (having crtRB1 gene) using line × tester mating design. 75 experimental hybrids with crtRB1 gene were evaluated over three locations. These experimental hybrids possessed higher BC (8.02μg/g), BCX (4.69μg/g), proA (10.37μg/g) compared to traditional hybrids used as check (BC: 2.36 μg/g, BCX: 1.53μg/g, proA: 3.13μg/g). Environment and genotypes × environment interaction had minor effects on proA content. Both additive and dominance gene action were significant for proA. Not Available |
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Date |
2021-08-03T05:37:39Z
2021-08-03T05:37:39Z 2021-02-04 |
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Type |
Research Paper
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/52446 |
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Language |
English
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Relation |
Not Available;
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Publisher |
PLOS ONE
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