MEIOSIS IN SESQUIDIPLOID HYBRIDS OF LYCOPERSICON-ESCULENTUM AND SOLANUM-LYCOPERSICOIDES

被引：50

作者：

RICK, CM ^{[1
]}

DEVERNA, JW ^{[1
]}

CHETELAT, RT ^{[1
]}

STEVENS, MA ^{[1
]}

机构：

[1] CAMPBELL INST RES & TECHNOL, DAVIS, CA 95616 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 1986年 / 83卷 / 11期

关键词：

D O I：

10.1073/pnas.83.11.3580

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We have synthesized diploid hybrids between Lycopersicon esculentum and Solanum lycopersicoides and have converted them to allotetraploids. Two sesquidiploids, having two complements of the former parent and one of the latter, have been obtained by backcrossing the former parent with the alloploid. In meiosis of the sesquidiploid the L. esculentum chromosomes exhibit strong preferential pairing, consistently forming 12 bivalents, whereas the S. lycopersicoides chromosomes remain unpaired. This chromosomal comportment conforms with expectations based on meiosis of the 2.times. and 4.times. hybrids. Condensation of the S. lycopersicoides univalents is retarded in early diakinesis but their development appears normal at later stages. Presumably as a consequence of the orderly behavior of the L. esculentum bivalents and consequent contribution to each gamete, fertility of the sesquidiploids is higher than in L. esculentum autotriploids. The normally strict self-incompatibility is somewhat relaxed in the sesquidiploids. Extra S. lycopersicoides chromosomes can be transmitted from the sesquidiploid as pistillate parent, and the aneuploid progeny are viable. Establishment of alien addition races and their utilization to transmit desired genes from S. lycopersicoides to L. esculentum are anticipated.

引用

页码：3580 / 3583

页数：4

共 18 条

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