Chromosome doubling induces apomixis in a cassava×Manihot anomala hybrid

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Chromosome doubling induces apomixis in a cassava x Manihot anomala hybrid.

A new species was synthesized artificially by chromosome doubling of an interspecific hybrid between cassava and Manihot anomala. The ensuing polyploid type exhibits an apomictic nature and maintains its morphological characteristics in the progeny. It showed a 29% frequency of multiembryonic sacs in its examined ovules whereas the multiembryonic sacs were absent in the diploid type.

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Apomixis induces new species of Manihot*

Apomixis means production seed without fertilization. It perpetuates genotypes adapted to a certain environment. Genes of apomixis were detected in wild cassava and transferred to the cultivate by the senior author. A new species of Manihot species has evolved in our Living collection, at the Universidade de Brasília. Multiembryonic sacs were noted in its ovules. It bred true for four generatio...

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Apomixis Allows the Transgenerational Fixation of Phenotypes in Hybrid Plants

The introduction of apomixis-asexual reproduction through seeds-into crop plants is considered the holy grail of agriculture, as it would provide a mechanism to maintain agriculturally important phenotypes [1, 2]. Apomicts produce clonal offspring, such that apomixis could be used to transgenerationally fix any genotype, including that of F1 hybrids, which are used in agriculture due to their s...

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Apomixis: a developmental perspective.

The term apomixis encompasses a suite of processes whereby seeds form asexually in plants. In contrast to sexual reproduction, seedlings arising from apomixis retain the genotype of the maternal parent. The transfer of apomixis and its effective utilization in crop plants (where it is largely absent) has major advantages in agriculture. The hallmark components of apomixis include female gamete ...

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Apomixis and cassava.

Apomixis means seed formation without fertilization. In cassava (Manihot esculenta) it is an alternative to reproduction by cuttings, which normally transmits pathogens and leads to an accumulation of viral and bacterial diseases. Apomixis also assures preservation of heterosis and avoids genetic segregation. It occurs in wild relatives of cassava and has been transferred successfully from Mani...

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ژورنال

عنوان ژورنال: Hereditas

سال: 2006

ISSN: 0018-0661

DOI: 10.1111/j.2006.0018-0661.01957.x