Self -Compatibility in a Diploid Hybrid Population of Solanum phureja – S. stenotomum

AbstractPotato is the third most important staple food crop. To address challenges associated with global food security, a hybrid potato breeding system, aimed at converting potato from a tuber-propagated tetraploid crop into a seed-propagated diploid crop through crossing inbred lines, is under development. However, given that most diploid potatoes are self-incompatible, this represents a major obstacle which needs to be addressed in order to develop inbred lines. Here, we report on a self-compatible diploid potato, RH89-039-16 (RH), which can efficiently induce a mating transition from self-incompatibility to self-compatibility, when crossed to self-incompatible lines. We identify the S-locusinhibitor (Sli) gene in RH, capable of interacting with multiple allelic variants of the pistil-specific S-ribonucleases (S-RNases). Further, Sli gene functions like a general S-RNase inhibitor, to impart SC to RH and other self-incompatible potatoes. Discovery of Sli now offers a path forward for the diploid hybrid breeding program.

Download Full-text

Two Cycles of Recurrent Maternal Half-Sib Selection Reduce Foliar Late Blight in a Diploid Hybrid Solanum phureja-S. stenotomum Population by Two-thirds

American Journal of Potato Research ◽

10.1007/s12230-013-9345-9 ◽

2013 ◽

Vol 91 (3) ◽

pp. 254-259 ◽

Cited By ~ 3

Author(s):

Kathleen G. Haynes ◽

Xinshun Qu ◽

Barbara J. Christ

Keyword(s):

Late Blight ◽

Solanum Phureja ◽

Diploid Hybrid ◽

Sib Selection

Download Full-text

Mapping polygenes for tuber resistance to late blight in a diploid Solanum phureja × S. stenotomum hybrid population

Plant Breeding ◽

10.1111/j.1439-0523.2006.01232.x ◽

2006 ◽

Vol 125 (4) ◽

pp. 385-389 ◽

Cited By ~ 24

Author(s):

I. Simko ◽

S. Costanzo ◽

V. Ramanjulu ◽

B. J. Christ ◽

K. G. Haynes

Keyword(s):

Late Blight ◽

Solanum Phureja ◽

Hybrid Population ◽

Tuber Resistance

Download Full-text

Crude Protein Content in Diploid Hybrid Potato Clones of Solanum phureja–S. stenotomum

Potato Research ◽

10.1007/s11540-012-9211-z ◽

2012 ◽

Vol 55 (3-4) ◽

pp. 315-322 ◽

Cited By ~ 4

Author(s):

Wenhe Lu ◽

Meng Yu ◽

Yamei Bai ◽

Wenxia Li ◽

Xuepu Xu

Keyword(s):

Protein Content ◽

Crude Protein ◽

Solanum Phureja ◽

Diploid Hybrid ◽

Crude Protein Content

Download Full-text

INCORPORATION OF GLANDULAR TRICHOMES INTO AN ADVANCED SOLANUM PHUREJA-STEN0TOMUM HYBRID POPULATION

HortScience ◽

10.21273/hortsci.26.5.492g ◽

1991 ◽

Vol 26 (5) ◽

pp. 492g-492

Author(s):

Roger L. Vallejo ◽

Wanda W. Collins ◽

Rocco Schiavone

Keyword(s):

Glandular Trichomes ◽

Diploid Species ◽

Rank Correlation ◽

Solanum Phureja ◽

Hybrid Population ◽

Solanum Stenotomum ◽

Narrow Sense Heritability ◽

Horticultural Traits ◽

Additive Gene ◽

Very High

A hybrid diploid potato population (Solanum phureja x Solanum stenotomum) with superior horticultural traits has been developed for breeding purposes. Because this highly advanced population has no resistance to potato virus Y (PVY), and because PVY pressure is very high in North Carolina, glandular trichomes from another diploid species, Solanum berthaultii, were introduced as a defense against aphids, the PVY vector. Two types of glandular trichomes, A and B, were transferred. Preliminary results show that genetic diversity and broad-sense heritability are adequate to transfer these traits; however, non-additive gene action was indicated in narrow-sense heritability estimates. Spearman's coefficients of rank correlation showed a low level of association between A and B trichomes; density of both types is postulated to be under the control of a Small number of genes.

Download Full-text

Three Cycles of Recurrent Maternal Half-Sib Selection Continue to Reduce Foliar Late Blight in a Diploid Hybrid Solanum phureja-S. stenotomum Population

American Journal of Potato Research ◽

10.1007/s12230-018-9681-x ◽

2018 ◽

Vol 96 (1) ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

Kathleen G. Haynes ◽

Xinshun Qu

Keyword(s):

Late Blight ◽

Solanum Phureja ◽

Diploid Hybrid ◽

Sib Selection

Download Full-text

Identification of the High Frequency of Triploid Potato Resulting from Tetraploid × Diploid Crosses

HortScience ◽

10.21273/hortsci13797-18 ◽

2019 ◽

Vol 54 (7) ◽

pp. 1159-1163

Author(s):

Ryan C. Graebner ◽

Hsuan Chen ◽

Ryan N. Contreras ◽

Kathleen G. Haynes ◽

Vidyasagar Sathuvalli

Keyword(s):

High Frequency ◽

Potato Breeding ◽

Unreduced Gametes ◽

Hybrid Population ◽

Development Programs ◽

Diploid Hybrid ◽

Diploid Parent ◽

Genomic Studies ◽

Triploid Block ◽

Triploid Clones

Conventional wisdom regarding potato breeding indicates that a strong triploid block prevents the development of viable triploid seeds from crosses between tetraploid and diploid clones. However, in a recent set of crosses between elite tetraploid potatoes and an improved diploid hybrid population derived from group Stenotomum and group Phureja, 61.5% of the resulting clones were found to be triploid. If clones derived from one diploid parent suspected of producing a high frequency of unreduced gametes were excluded, then the frequency of triploid clones increased to 74.4%. Tubers of these triploids are generally intermediates of the two parental groups. Our findings indicate the possibility of using triploid potatoes in potato variety development programs and in genetic and genomic studies.

Download Full-text