eprintid: 11650
rev_number: 9
eprint_status: archive
userid: 3170
dir: disk0/00/01/16/50
datestamp: 2020-11-14 05:52:34
lastmod: 2020-11-14 05:53:06
status_changed: 2020-11-14 05:52:34
type: article
metadata_visibility: show
creators_name: Gaddameedi, A
creators_name: Phuke, R M
creators_name: Kishor Bilhan Polavarapu, K
creators_name: Gorthy, S
creators_name: Subhasini, V
creators_name: Jagannathan, J
creators_name: Kumar Are, A
creators_gender: Female
creators_gender: Female
icrisatcreators_name: Gorthy, S
icrisatcreators_name: Subhasini, V
icrisatcreators_name: Jagannathan, J
icrisatcreators_name: Kumar Are, A
affiliation: ICRISAT (Patancheru)
affiliation: Indian Agricultural Research Institute, Regional Station, Indore, M.P
affiliation: Osmania University, Hyderabad, Telangana
affiliation: Department of Biotechnology, Vignan’s Foundation for Science, Technology and Research, Vadlamudi, Guntur
country: India
title: Heterosis and combining ability for grain Fe and Zn concentration and agronomic traits in sorghum [Sorghum bicolor (L.) Moench]
ispublished: pub
subjects: s1.4
subjects: s2.13
divisions: CRPS2
full_text_status: public
keywords: Heterosis, GCA, SCA, Gene action, Grain iron, Grain zinc
note: Planning experiments, supporting and monitoring of research -
AAK; Performance of experiments – AG, RP, JJ, SG; Data analysis
was carried out by AG, RP; and manuscript development and
review – AG, RP, AAK, PK, PBK.
abstract: Studies on genetics and trait relationships with grain yield and other agronomic traits are critical for
improving the micronutrients content in the grain and it forms an effective strategy for breeding bio fortified
sorghum. It greatly contributes to addressing micronutrient malnutrition in poor people who are
dependent on sorghum as a staple food. Development of hybrids with high grain Fe and Zn and higher
yield enables delivery of commercial products that address both food and nutrition while bringing profits
to farmers. The present study was aimed at developing suitable breeding strategy and improving breeding
products using gene action, heterosis and combining ability analysis for improving the grain Iron (Fe)
and Zinc (Zn) concentration and grain yield in sorghum. This study was conducted in Line  Tester mating
design involving seven parents. A total of 12 new hybrids were developed by mating three lines with
four testers. The combining ability of the crosses indicated predominance of dominance variance than
additive variance for the agronomic traits such as days to 50% flowering, grain yield, grain Fe and Zn concentrations
except for plant height and 100 seed weight. Higher magnitude of SCA than GCA variance for
grain iron and zinc concentrations indicated the importance of non-additive gene action in the improvement
of nutritional traits. Hybrids exhibited heterosis for agronomic traits and for grain Fe concentration
and grain Zn. Most of the traits showed significant positive heterosis over mid parent value indicating the
predominance of dominant gene action except the trait 100 seed weight. Significant positive mid-parent
heterosis for grain iron indicated that there would be an opportunity to exploit heterosis in improving for
grain Fe. But for Zn concentration, there is a limited possibility for exploitation of heterosis. This study
suggested that simple selection will improve plant height and 100 seed weight in sorghum but heterosis
breeding is more useful for improving grain yield. While both parents need to be improved for improving
grain Zn concentration, there is good scope for exploiting heterosis for improving grain Fe concentration
in sorghum.
date: 2020-08
date_type: published
publication: Journal of King Saud University - Science (TSI)
volume: 32
number: 7
publisher: Elsevier
pagerange: 2989-2994
id_number: doi:10.1016/j.jksus.2020.08.003
refereed: TRUE
issn: 1018-3647
official_url: https://doi.org/10.1016/j.jksus.2020.08.003
related_url_url: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=10.1016%2Fj.jksus.2020.08.003&btnG=
related_url_type: pub
citation:   Gaddameedi, A and Phuke, R M and Kishor Bilhan Polavarapu, K and Gorthy, S and Subhasini, V and Jagannathan, J and Kumar Are, A  (2020) Heterosis and combining ability for grain Fe and Zn concentration and agronomic traits in sorghum [Sorghum bicolor (L.) Moench].  Journal of King Saud University - Science (TSI), 32 (7).  pp. 2989-2994.  ISSN 1018-3647     
document_url: http://oar.icrisat.org/11650/1/1-s2.0-S1018364720302329-main.pdf