Interspecific hybridization between Cajanus cajan and Cajanus cajanifolius



Document title: Interspecific hybridization between Cajanus cajan and Cajanus cajanifolius
Journal: CBAB. Crop breeding and applied biotechnology
Database: PERIÓDICA
System number: 000269926
ISSN: 1518-7853
Authors: 1
Institutions: 1Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu. India
Year:
Season: Jun
Volumen: 7
Number: 2
Pages: 204-211
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract Interspecific hybridization between five Canajus cajan genotypes viz., ICPL 87, CORG 9302, CORG 5, TAT 93- 47 and AS 46 and the wild species C. cajanifolius was attempted. Successful pod set was observed in direct crosses involving C. cajan as ovule parent and C. cajanifolius as pollen parent while the reciprocal crosses failed to set pods. The only surviving F1 of ICPL 87 × C. cajanifolius was vigorous in growth and exhibited intermediate leaf and flower morphology with predominance of C. cajanifolius plant type. Chromosome pairing was rather irregular in the F1 hybrid with loose pairing, univalents, quadrivalents and abnormalities like laggards, stickiness, bridges, precocious separation and non-synchronization of the genomes. Pollen fertility of the hybrid was low and occurrence of triads was noticed. The partial homology coupled with seed set suggested the possibility of incorporating traits of economic importance such as pest resistance from C. cajanifolius into C. cajan
Portuguese abstract A hibridação interespecífica entre cinco genótipos de Canajus cajan - ICPL 87, CORG 9302, CORG 5, TAT 93- 47 e AS 46 – e a espécie silvestre C. cajanifolius foi tentada. Sucesso na frutificação foi observado nos cruzamentos diretos envolvendo C. cajan como genitor feminino e C. cajanifolius como genitor masculino, enquanto os cruzamentos recíprocos falharam. O único híbrido F1 sobrevivente de ICPL 87 × C. cajanifolius se mostrou crescimento vigoroso e exibiu morfologia de folhas e flores intermediária, com predomínio do tipo de planta de C. cajanifolius. Pareamento cromossômico no híbrido F1 foi bastante irregular, com perda de pareamento, univalentes, quadrivalentes e outras anormalidades, separação precoce e não sincronização dos genomas. A fertilidade do pólen do híbrido foi baixa, com ocorrência de tríades. A homologia parcial e a produção de sementes sugerem a possibilidade de incorporar caracteres de importância como resistência a pragas de C. cajanifolius em C. cajan
Disciplines: Agrociencias
Keyword: Fitotecnia,
Leguminosas,
Biotecnología,
Mejoramiento genético,
Cajanus cajan,
Cajanus cajanifolius,
Híbridos,
Genotipos,
Rendimiento
Keyword: Agricultural sciences,
Crop husbandry,
Legumes,
Genetic improvement,
Cajanus cajan,
Cajanus cajanifolius,
Hybrids,
Genotypes,
Yield
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