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Can a speed breeding approach accelerate genetic gain in pigeonpea?

OAR@ICRISAT

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Relation http://oar.icrisat.org/11486/
https://doi.org/10.1007/s10681-019-2520-4
doi:10.1007/s10681-019-2520-4
 
Title Can a speed breeding approach accelerate genetic gain in pigeonpea?
 
Creator Saxena, K B
Saxena, R K
Hickey, L T
Varshney, R K
 
Subject Plant Breeding
Pigeonpea
Genetics and Genomics
 
Description 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.
 
Publisher Springer Verlag
 
Date 2019-11
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11486/1/11_2019_Euphytica_Speed%20Breeding%20in%20Pigeonpea.pdf
Saxena, K B and Saxena, R K and Hickey, L T and Varshney, R K (2019) Can a speed breeding approach accelerate genetic gain in pigeonpea? Euphytica (TSI), 215 (12). pp. 1-7. ISSN 0014-2336