extent of embryo and endosperm growth following interspecific hybridization between Cicer arietinum L. and related annual wild species

In vivo interspecific pollinations were performed and immature seed development investigated by histological methods in order to study crossability barrier(s) in Cicer L. species wide hybridization. Seven of the eight wild annual Cicer species, belonging to the secondary and tertiary gene pools, wer...

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Bibliographic Details
Published in:Genetic resources and crop evolution 2004-11, Vol.51 (7), p.765-772
Main Authors: Ahmad, F, Slinkard, A.E
Format: Article
Language:English
Subjects:
annuals
Chickpeas
Cicer
Cicer arietinum
embryo (plant)
embryo abortion
Embryos
Endosperm
Genetic resources
Growth rate
Hybridization
Hybrids
In vivo methods and tests
Interspecific
Interspecific hybridization
plant breeding
seed abortion
seed development
Species
wild relatives
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Summary:In vivo interspecific pollinations were performed and immature seed development investigated by histological methods in order to study crossability barrier(s) in Cicer L. species wide hybridization. Seven of the eight wild annual Cicer species, belonging to the secondary and tertiary gene pools, were used in reciprocal crosses with the cultivated chickpea. It was confirmed that the zygote was formed in all interspecific crosses. The embryos showed continued and retarded growth at different rate in various crosses, but eventually aborted at an early pro-embryo stage in all crosses except C. arietinum L. x C. echinospermum Dav. Reciprocal cross differences were observed in early embryo growth rate and could have implications in obtaining hybrids. This study further emphasizes the necessity for developing appropriate and efficient in vitro procedures for rescuing immature globular hybrid pro-embryos, which will make the wild Cicer gene resources amenable to chickpea improvement.
ISSN:0925-9864
1573-5109
DOI:10.1023/B:GRES.0000034580.67728.e4