NDLI: Novel interspecific hybridization between sweetpotato (Ipomoea batatas (L.) Lam.) and its two diploid wild relatives

Content Provider	Springer Nature Link
Author	Cao, Qinghe Zhang, An Ma, Daifu Li, Hongmin Li, Qiang Li, Peng
Copyright Year	2009
Abstract	Interspecific hybridization is an important approach to broaden the genetic base and create novel plant forms in breeding programs. However, interspecific hybridization in Ipomoea is very difficult due to the cross incompatibility. Here we report two novel interspecific F1 hybrids between I. batatas (L.) Lam. (2n = 6x = 90) and two wild species, I. grandifolia (2n = 2x = 30) and I. purpurea (2n = 2x = 30). Hybridization was stimulated by applying plant growth hormones. Morphological, molecular and cytological tests were conducted to confirm their hybridity. We found that the two hybrids were quite distinctive in leaf color and morphology, and yielded intermediate sizes of storage roots compared to their respective parents. Inter-simple sequence repeat analysis showed that the unique DNA bands from the wild parents could be detected in these two hybrids. The cluster analysis also showed that the two F1 hybrids were closer to I. batatas in phylogeny relationship. The number of chromosomes of the two hybrids was both 60, indicating that the hybrids were tetraploid. The meiotic configuration analysis of the H1 of I. batatas × I. grandifolia revealed the occurrence of 17.58I + 14.28II + 1.36III + 2.48IV at metaphase I in average chromosome association per pollen mother cells (PMCs), 4.26I + 18.32II + 2.56III + 3.12IV was average meiotic configuration in the H2 of I. batatas × I. purpurea. Both hybrids appeared to be polyads and multi-microcytes at tetrad phase and differed in their pollen fertility.
Starting Page	345
Ending Page	352
Page Count	8
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	169
Issue Number	3
e-ISSN	15735060
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-06-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Interspecific hybrids Morphology Molecular Cytology Biotechnology Plant Physiology Plant Pathology Plant Genetics & Genomics Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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Wx intron variations support an allohexaploid origin of the sweetpotato [Ipomoea batatas (L.) Lam]

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