期刊
EUPHYTICA
卷 215, 期 12, 页码 -出版社
SPRINGER
DOI: 10.1007/s10681-019-2520-4
关键词
Early maturing cultivars; Immature seed germination; Pigeonpea; Rapid generation turnover; Single pod descent method
资金
- Department of Agriculture Cooperation and Farmers Welfare, Ministry of Agriculture and Farmers Welfare, Government of India
- United States Agency for International Development (USAID)
- Department of Biotechnology, Government of India
- Ministry of Agriculture, Government of Karnataka
- ICRISAT
Pure line breeding is a resource-intensive activity that takes 10 years or more to develop a new cultivar. In some crops, conducting off-season nurseries has significantly reduced the length of the breeding cycle. This approach could not be exploited in pigeonpea [Cajanus cajan (L.) Millsp.], because traditionally it has been a photoperiod-sensitive crop that requires long periods of darkness to induce flowering. However, the recent success of breeding early maturing photoperiod-insensitive genotypes has opened up the possibility of adopting 'speed breeding' techniques to enable rapid generation turnover. This paper outlines a speed breeding approach that integrates the use of immature seed germination for rapid generation advancement and a single pod descent method of breeding. To accelerate line development, while conserving genetic variability, the approach permits four generations per year and can fast-track field evaluation of resulting homozygous lines. Therefore, the breeding strategy conserves resources and has potential to deliver new early maturing cultivars within a substantially reduced timeframe of 4-5 years.
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