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Rapid generation advance(RGA) in chickpea to produce up to seven generations per year and enable speed breeding

The Crop Journal 2020年第1期8卷 164-169页

作者： Srinivasan Samineni Madhuparni Sen sobhan bsajja Pooran MGaura International Crops Research Institute for the Semi-Arid Tropics(ICRISAT) PatancheruTelangana 502324India The UWA Institute of Agriculture University of Western AustraliaPerthWA 6009Australia

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 *** experiment was conducted for two years under glasshouse *** photoperiod was extended to induce early flowering and immature seeds were germinated to further reduce generation cycle *** 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 *** earliest stage of immature seed able to germinate was 20–23 days after anthesis in accessions of different maturity *** 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 ***,the late-maturing accession CDCFrontier could not be advanced further after three generation cycles owing to the strong influence of photoperiod and *** mean total number of generations produced per year were respectively 7,6.2,and 6 in early-,medium-,and late-maturing *** 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).

关键词： Photoperiod Immature seeds Flowering Rapid generation turnover Speed breeding

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