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Morphology, Cytology and Fertility of Avena sativa L. × A. magna Murph. et Terrell Amphiploids
Author(s) -
Premachandran M. N.,
Choubey R. N.,
Gupta S. K.
Publication year - 1986
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1986.tb01064.x
Subject(s) - biology , avena , peduncle (anatomy) , pollen , pedicel , panicle , botany , ploidy , glume , stamen , fertility , plant morphology , inflorescence , chromosome number , sterility , chromosome , karyotype , genetics , population , demography , sociology , gene
The genotypes of Avena sativa were crossed to A. magna Murph. et Terrell, from the sterile pentapliod F 1 amphiploids were successfully developed after colchicine treatment. The C 1 plants were observed for their morphology, cytology and fertility. These plants were characterized by longer and broader glumes, swollen pedicel attachment, pubescent lemmas, bold seeds and persistent spikelets. Other characters, viz., final plant height, rachis length, peduncle length and spikelets per panicle were intermediate. All plants hail the chromosome number 2n = 70 or close to. 7C. Due to stickiness of chromosomes, meiosis of only two decaploid plants could be studied in detail. The average chromosome Association was 1.3 I + 28.56 II + 1.4 III + 1.77 IV + 0.07 VI and 0.13 I + 28.7 II + 0.14 III + 2.09 IV + 0.59 VI; but in some cells up to 35 bivalents were observed. Seed set as well as pollen fertility and size exhibited great variation.