Abstract
Abstract Vitamin A deficiency in humans is a widespread health problem. Quality protein maize (QPM) is a popular food rich in lysine and tryptophan, but poor in provitamin A (proA). Here, we report the improvement of an elite QPM inbred, HKI1128Q for proA using marker‐assisted introgression of crtRB1 ‐favourable allele. HKI1128 was one of the parental lines of three popular hybrids in India and was converted to QPM in our earlier programme. Severe segregation distortion for crtRB1 was observed in BC 1 F 1 , BC 2 F 1 and BC 2 F 2 . Background selection by 100 SSRs revealed mean recovery of 91.07% recurrent parent genome varying from 88.78% to 93.88%. Across years, introgressed progenies possessed higher mean β‐carotene (BC: 9.22 µg/g), β‐cryptoxanthin (BCX: 3.05 µg/g) and provitamin A (proA: 10.75 µg/g) compared to HKI1128Q (BC: 2.26 µg/g, BCX: 2.26 µg/g and proA: 3.38 µg/g). High concentration of essential amino acids, viz. lysine (mean: 0.303%) and tryptophan (0.080%) in endosperm, was also retained. Multi‐year evaluation showed that introgressed progenies possessed similar grain yield (1,759–1,879 kg/ha) with HKI1128Q (1,778 kg/ha). Introgressed progenies with higher lysine, tryptophan and proA hold immense potential as donors and parents in developing biofortified hybrids.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Severe segregation distortion for crtRB1 was observed in BC1F1, BC2F1 and BC2F2 populations of the maize introgression.
- Organ / stage
- BC 1 F 1 , BC 2 F 1 and BC 2 F 2e2
- Gene
- crtRB1e2
- Outcome
- segregation distortione2
- Qualifier
- Severee2
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e2“Severe segregation distortion for crtRB1 was observed in BC 1 F 1 , BC 2 F 1 and BC 2 F 2”
Claim · model-written summary
Background selection with 100 SSRs recovered on average 91.07% of the recurrent parent genome.
- Treatment
- Background selection by 100 SSRse1
- Outcome
- recurrent parent genomee1
- Value
- 91.07%e1
- Qualifier
- varying from 88.78% to 93.88%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e1“Background selection by 100 SSRs revealed mean recovery of 91.07% recurrent parent genome varying from 88.78% to 93.88%”
Claim · model-written summary
Introgressed progenies had higher mean β‐carotene (9.22 µg/g) than HKI1128Q (2.26 µg/g).
- Treatment
- introgressed progeniese3
- Outcome
- β‐carotenee3
- Direction
- highere3
- Value
- 9.22 µg/ge3
- Qualifier
- 2.26 µg/ge3
- Comparator
- HKI1128Qe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e3“Across years, introgressed progenies possessed higher mean β‐carotene (BC: 9.22 µg/g), β‐cryptoxanthin (BCX: 3.05 µg/g) and provitamin A (proA: 10.75 µg/g) compared to HKI1128Q (BC: 2.26 µg/g, BCX: 2.26 µg/g and proA: 3.38 µg/g)”
Claim · model-written summary
Introgressed progenies had higher mean β‐cryptoxanthin (3.05 µg/g) than HKI1128Q (2.26 µg/g).
- Treatment
- introgressed progeniese3
- Outcome
- β‐cryptoxanthine3
- Direction
- highere3
- Value
- 3.05 µg/ge3
- Qualifier
- 2.26 µg/ge3
- Comparator
- HKI1128Qe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e3“Across years, introgressed progenies possessed higher mean β‐carotene (BC: 9.22 µg/g), β‐cryptoxanthin (BCX: 3.05 µg/g) and provitamin A (proA: 10.75 µg/g) compared to HKI1128Q (BC: 2.26 µg/g, BCX: 2.26 µg/g and proA: 3.38 µg/g)”
Claim · model-written summary
Introgressed progenies had higher mean provitamin A (10.75 µg/g) than HKI1128Q (3.38 µg/g).
- Treatment
- introgressed progeniese3
- Outcome
- provitamin Ae3
- Direction
- highere3
- Value
- 10.75 µg/ge3
- Qualifier
- 3.38 µg/ge3
- Comparator
- HKI1128Qe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e3“Across years, introgressed progenies possessed higher mean β‐carotene (BC: 9.22 µg/g), β‐cryptoxanthin (BCX: 3.05 µg/g) and provitamin A (proA: 10.75 µg/g) compared to HKI1128Q (BC: 2.26 µg/g, BCX: 2.26 µg/g and proA: 3.38 µg/g)”
Claim · model-written summary
Introgressed progenies retained a high lysine concentration (0.303%) in endosperm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e4“High concentration of essential amino acids, viz. lysine (mean: 0.303%) and tryptophan (0.080%) in endosperm, was also retained”
Claim · model-written summary
Introgressed progenies retained a high tryptophan concentration (0.080%) in endosperm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e4“High concentration of essential amino acids, viz. lysine (mean: 0.303%) and tryptophan (0.080%) in endosperm, was also retained”
Claim · model-written summary
Introgressed progenies had grain yield similar to HKI1128Q (1,778 kg/ha).
- Treatment
- introgressed progeniese5
- Outcome
- grain yielde5
- Direction
- similare5
- Value
- 1,759–1,879 kg/hae5
- Qualifier
- Multi‐year evaluatione5
- Comparator
- HKI1128Qe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e5“Multi‐year evaluation showed that introgressed progenies possessed similar grain yield (1,759–1,879 kg/ha) with HKI1128Q (1,778 kg/ha)”
Claim · model-written summary
Introgressed progenies with higher lysine, tryptophan and provitamin A are potential donors and parents for biofortified maize hybrids.
- Outcome
- donors and parents in developing biofortified hybridse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“elite quality protein maize inbred”
e6“Introgressed progenies with higher lysine, tryptophan and proA hold immense potential as donors and parents in developing biofortified hybrids”
The same questions in other papers
transgenic · molecular: metabolites · Zea mays (maize)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
6 papers more in this group
See all 10 papers →transgenic · yield · Zea mays (maize)Positive and negative results
17 papers in the same direction as this paper · 51 in the opposite direction
- positive
- positive
- positive
65 papers more in this group
See all 69 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.