Morphology, fertility and cytogenetics of intergeneric hybrid between Roegneria kamoji Ohwi and Dasypyrum villosum (L.) Candargy (Poaceae: Triticeae)

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Morphology, fertility and cytogenetics of intergeneric hybrid between Roegneria kamoji Ohwi and Dasypyrum villosum (L.) Candargy (Poaceae: Triticeae)

ZHOU Yong-Hong, WU Bi-Hua, FU Ti-Hua, ZHENG You-Liang

Received:1900-01-01 Revised:1900-01-01 Online:1999-03-10 Published:1999-03-10
Contact: ZHOU Yong-Hong

Abstract

Abstract:

The intergeneric hybrids between Roegneria kamoji Ohwi and Dasypyrum villo-

sum (L.)Candargy were successfully obtained by means of embryo culture in vitro. Studies

on morphology, fertility and chromosome pairing behavior in meiosis of the parents and their

hybrid F_l were carried out in the present work. The results showed that: (1) there were ob-

vious morphological differences between R. kamoji and D. villosum, and spikes of F_l

plants were morphologically intermediate between the two parental species; (2) the seed set

of the cross was 11.63%; the hybrid plant was infertile, which indicated that strong repro-

ductive isolation existed between the parents and R. kamoji and D. villosum were inde-

pendent biological species; (3) The somatic chromosome number in root-tips of F_l hybrids

was 28. Chromosome pairing at MI of PMCs in F_l hybrids was quite low. The meiotic con-

figuration was 26.72 Ⅰ + 0.62 Ⅱ + 0.02 Ⅲ, which indicated that very low homoeology

was detected between the St, H, Y genomes of R. kamoji and the V genome of D. villo-

sum, and the relationship between the parental species was remote.

Key words: Roegneria kamoji, Dasypyrum villosum, Intergeneric hybrid, Meiosis, Genome, Chromosome pairing Relationship

ZHOU Yong-Hong, WU Bi-Hua, FU Ti-Hua, ZHENG You-Liang. Morphology, fertility and cytogenetics of intergeneric hybrid between Roegneria kamoji Ohwi and Dasypyrum villosum (L.) Candargy (Poaceae: Triticeae)[J]. .

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Morphology, fertility and cytogenetics of intergeneric hybrid between Roegneria kamoji Ohwi and Dasypyrum villosum (L.) Candargy (Poaceae: Triticeae)

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