eprintid: 11379
rev_number: 12
eprint_status: archive
userid: 3170
dir: disk0/00/01/13/79
datestamp: 2020-02-24 09:08:58
lastmod: 2020-03-28 07:05:17
status_changed: 2020-02-24 09:08:58
type: article
metadata_visibility: show
creators_name: Samineni, S
creators_name: Sen, M
creators_name: Sajja, S B
creators_name: Gaur, P M
icrisatcreators_name: Samineni, S
icrisatcreators_name: Sen, M
icrisatcreators_name: Sajja, S B
icrisatcreators_name: Gaur, P M
affiliation: ICRISAT (Patancheru)
affiliation: The UWA Institute of Agriculture, University of Western Australia, (Perth)
country: India
country: Australia
title: Rapid generation advance (RGA) in chickpea to produce up to seven generations per year and enable speed breeding
ispublished: pub
subjects: PLB1
subjects: s1.1
subjects: s355
divisions: CRPS2
crps: CG1
full_text_status: public
keywords: Photoperiod, Immature seeds, Flowering, Rapid generation, Turnover
Speed breeding
note: This work was undertaken as part of the CGIAR Research
Program on Grain Legumes and Dryland Cereals. We would
like to thank Dr. Mahesh D. Mahendrakar, Research Fellow,
chickpea breeding and Dr. Yashoda, Research Fellow at
ICRISAT, for their help during data compilation and technical inputs in manuscript preparation.
abstract: This study was aimed at developing a protocol for increasing the number of generation cycles per year in chickpea (Cicer arietinum L.). Six accessions, two each from early (JG 11 and JG 14), medium (ICCV 10 and JG 16), and late (CDC-Frontier and C 235) maturity groups, were
used. The experiment was conducted for two years under glasshouse conditions. The photoperiod was extended to induce early flowering and immature seeds were germinated
to further reduce generation cycle time. Compared to control, artificial light caused a reduction in flowering time by respectively 8–19, 7–16, and 11–27 days in early-, medium-, and late-maturing accessions. The earliest stage of immature seed able to germinate was 20–23 days after anthesis in accessions of different maturity groups. The time period between germination and the earliest stage of immature seed suitable for germination was considered one generation cycle and spanned respectively 43–60, 44–64, and 52–79 days in early-, medium-, and late-maturing accessions. However, the late-maturing accession CDCFrontier
could not be advanced further after three generation cycles owing to the strong influence of photoperiod and temperature. The mean total number of generations produced
per year were respectively 7, 6.2, and 6 in early-, medium-, and late-maturing accessions. These results have encouraging implications for breeding programs: rapid progression toward homozygosity, development of mapping populations, and reduction in time, space
and resources in cultivar development (speed breeding).
date: 2020-02
date_type: published
publication: The Crop Journal (TSI)
volume: 8
number: 1
publisher: KeAi
pagerange: 164-169
id_number: doi:10.1016/j.cj.2019.08.003
refereed: TRUE
issn: 22145141
official_url: https://doi.org/10.1016/j.cj.2019.08.003
related_url_url: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=Rapid+generation+advance+%28RGA%29+in+chickpea+to+produce+up+to+seven+generations+per+year+and+enable+speed+breeding+&btnG=
related_url_type: pub
citation:   Samineni, S and Sen, M and Sajja, S B and Gaur, P M  (2020) Rapid generation advance (RGA) in chickpea to produce up to seven generations per year and enable speed breeding.  The Crop Journal (TSI), 8 (1).  pp. 164-169.  ISSN 22145141     
document_url: http://oar.icrisat.org/11379/1/main.pdf