Cytological analysis of F1 hybrid between Vigna radiata (L.) Wilczek (mungbean) and Vigna mungo (L.) Hepper (black gram).

Date

3-1991

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Dolores A. Ramirez

Abstract

Chromosome morphology and the meiotic behavior of V. radiata, V. mango and their F1 hybrids were determined. Meiotic behavior of bath parents and the F1 hybrid were related to its fertility and breeding behavior radiata and V. mungo had higher frequency of normal pairing at diakinesis (11II) (75.92% and 79.17% respectively, than the F1 hybrids (43.14%) which showed several chromosomal configurations. In other meiotic stage chromosomal abnormalities observed in the hybrids are significantly higher. The percentage pollen fertility in the F1 was determined to be within the range of 3.47% to 9.19% as compared to a higher percentage pollen fertility in both parents which ware observed to be within 'the range 'al 91-38% 94.14% for V. radiate and 85.42% to 96.52% for V. mango. The low percent fertility in the F1 is attributed to the high chromosomal abnormalities in the different meiotic stages. Such abnormalities are duo to incomplete homology, difference in duration of meiotic cycle or duration of each meiotic stage of the the parents. High pollen sterility may also be attributed to the genic factors.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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